I have a code below and its a PIE & BAR CHART.
The values now are all static but I want to be able to pull the values from
a database.
Can you guys give me some ideas to do this?
Thanks
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
'Declare your object variables
Dim i As Integer
'Build a BitMap that will act as the pallet and container
'for the bar graph. Here 600 is the width and 300 is the height.
'These values could also be passed as parameters.
Dim objBitMap As New Bitmap(400, 200)
'Declare your Graphics objects for painting graphics on you newly
created bitmap.
Dim objGraphics As Graphics
objGraphics = Graphics.FromImage(objBitMap)
'Set the background color to silver
objGraphics.Clear(Color.Silver)
'Build an array of values for the bar and pie chart.
'These values could also be pulled from a database.
' Retrieve Products Table
Dim arrValues(5) As Integer
arrValues(0) = 100
arrValues(1) = 135
arrValues(2) = 115
arrValues(3) = 125
arrValues(4) = 75
arrValues(5) = 300
Dim arrValueNames(5) As String
arrValueNames(0) = "Jan"
arrValueNames(1) = "Feb"
arrValueNames(2) = "Mar"
arrValueNames(3) = "Apr"
arrValueNames(4) = "May"
arrValueNames(5) = "June"
'Write out a title for your bar and pie chart.
objGraphics.DrawString("5 Month Projection Report", New
Font("Tahoma", 16), Brushes.Black, New PointF(5, 5))
'Create a legend to describe your bar and chart.
Dim symbolLeg As PointF = New PointF(335, 20)
Dim descLeg As PointF = New PointF(360, 16)
For i = 0 To arrValueNames.Length - 1
objGraphics.FillRectangle(New SolidBrush(GetColor(i)),
symbolLeg.X, symbolLeg.Y, 20, 10)
objGraphics.DrawRectangle(Pens.Black, symbolLeg.X, symbolLeg.Y,
20, 10)
objGraphics.DrawString(arrValueNames(i).ToString, New
Font("Tahoma", 10), Brushes.Black, descLeg)
symbolLeg.Y += 15
descLeg.Y += 15
Next i
'Loop through the values to create the Bar Chart.
For i = 0 To arrValues.Length - 1
objGraphics.FillRectangle(New SolidBrush(GetColor(i)), (i * 35)
+ 15, 200 - arrValues(i), 20, arrValues(i) + 5)
objGraphics.DrawRectangle(Pens.Black, (i * 35) + 15, 200 -
arrValues(i), 20, arrValues(i) + 5)
Next
'Loop through the values to create the Pie Chart.
Dim sglCurrentAngle As Single = 0
Dim sglTotalAngle As Single = 0
i = 0
For i = 0 To arrValues.Length - 1
'Current Value / (sum of all the Values) * 360 degree angle
sglCurrentAngle = arrValues(i) / 550 * 360
objGraphics.FillPie(New SolidBrush(GetColor(i)), 220, 95, 100,
100, sglTotalAngle, sglCurrentAngle)
objGraphics.DrawPie(Pens.Black, 220, 95, 100, 100,
sglTotalAngle, sglCurrentAngle)
sglTotalAngle += sglCurrentAngle
Next i
objBitMap.Save(Response.OutputStream, ImageFormat.Gif)
End Sub
'This function returns a color for the bar and pie charts.
Private Function GetColor(ByVal itemIndex As Integer) As Color
Dim objColor As Color
Select Case itemIndex
Case 0
objColor = Color.Blue
Case 1
objColor = Color.Red
Case 2
objColor = Color.Yellow
Case 3
objColor = Color.Purple
Case 4
objColor = Color.Orange
Case 5
objColor = Color.Brown
Case 6
objColor = Color.Gray
Case 7
objColor = Color.Maroon
Case Else
objColor = Color.Green
End Select
Return objColor
End Function
9  3050 
Hi Patrick,
You can get the values to fill the arrValues and arrValueNames from the
database, and put them on a collection (instead of using a fixed array).
Additionally, you can create a struct (a value type) to hold the pairs
[Value, Name], like the one as follows:
public struct GraphValue
{
public Name;
public Value;
}
Then, you can iterate through your collection of data (a collection filled
with data of the type [Value, Name] defined above) with a for each and make
the appropriate drawings en each case
As an example, this could be a refactored piece of the code (c#, sorry ;)),
using the collection of values
ArrayList GraphValueCollection = new ArrayList();
....
....
int colorCode = 0;
foreach(GraphValue graphValue in GraphValueCollection)
{
colorCode++;
objGraphics.FillRectangle(New SolidBrush(GetColor(colorCode)),
symbolLeg.X, symbolLeg.Y, 20, 10);
objGraphics.DrawRectangle(Pens.Black, symbolLeg.X, symbolLeg.Y, 20, 10)
objGraphics.DrawString(graphValue.Value, New Font("Tahoma", 10),
Brushes.Black, descLeg);
symbolLeg.Y += 15;
descLeg.Y += 15;
}
Regards,
Leon
"Patrick.O.Ige" wrote: I have a code below and its a PIE & BAR CHART.
The values now are all static but I want to be able to pull the values from
a database.
Can you guys give me some ideas to do this?
Thanks
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
'Declare your object variables
Dim i As Integer
'Build a BitMap that will act as the pallet and container
'for the bar graph. Here 600 is the width and 300 is the height.
'These values could also be passed as parameters.
Dim objBitMap As New Bitmap(400, 200)
'Declare your Graphics objects for painting graphics on you newly
created bitmap.
Dim objGraphics As Graphics
objGraphics = Graphics.FromImage(objBitMap)
'Set the background color to silver
objGraphics.Clear(Color.Silver)
'Build an array of values for the bar and pie chart.
'These values could also be pulled from a database.
' Retrieve Products Table
Dim arrValues(5) As Integer
arrValues(0) = 100
arrValues(1) = 135
arrValues(2) = 115
arrValues(3) = 125
arrValues(4) = 75
arrValues(5) = 300
Dim arrValueNames(5) As String
arrValueNames(0) = "Jan"
arrValueNames(1) = "Feb"
arrValueNames(2) = "Mar"
arrValueNames(3) = "Apr"
arrValueNames(4) = "May"
arrValueNames(5) = "June"
'Write out a title for your bar and pie chart.
objGraphics.DrawString("5 Month Projection Report", New
Font("Tahoma", 16), Brushes.Black, New PointF(5, 5))
'Create a legend to describe your bar and chart.
Dim symbolLeg As PointF = New PointF(335, 20)
Dim descLeg As PointF = New PointF(360, 16)
For i = 0 To arrValueNames.Length - 1
objGraphics.FillRectangle(New SolidBrush(GetColor(i)),
symbolLeg.X, symbolLeg.Y, 20, 10)
objGraphics.DrawRectangle(Pens.Black, symbolLeg.X, symbolLeg.Y,
20, 10)
objGraphics.DrawString(arrValueNames(i).ToString, New
Font("Tahoma", 10), Brushes.Black, descLeg)
symbolLeg.Y += 15
descLeg.Y += 15
Next i
'Loop through the values to create the Bar Chart.
For i = 0 To arrValues.Length - 1
objGraphics.FillRectangle(New SolidBrush(GetColor(i)), (i * 35)
+ 15, 200 - arrValues(i), 20, arrValues(i) + 5)
objGraphics.DrawRectangle(Pens.Black, (i * 35) + 15, 200 -
arrValues(i), 20, arrValues(i) + 5)
Next
'Loop through the values to create the Pie Chart.
Dim sglCurrentAngle As Single = 0
Dim sglTotalAngle As Single = 0
i = 0
For i = 0 To arrValues.Length - 1
'Current Value / (sum of all the Values) * 360 degree angle
sglCurrentAngle = arrValues(i) / 550 * 360
objGraphics.FillPie(New SolidBrush(GetColor(i)), 220, 95, 100,
100, sglTotalAngle, sglCurrentAngle)
objGraphics.DrawPie(Pens.Black, 220, 95, 100, 100,
sglTotalAngle, sglCurrentAngle)
sglTotalAngle += sglCurrentAngle
Next i
objBitMap.Save(Response.OutputStream, ImageFormat.Gif)
End Sub
'This function returns a color for the bar and pie charts.
Private Function GetColor(ByVal itemIndex As Integer) As Color
Dim objColor As Color
Select Case itemIndex
Case 0
objColor = Color.Blue
Case 1
objColor = Color.Red
Case 2
objColor = Color.Yellow
Case 3
objColor = Color.Purple
Case 4
objColor = Color.Orange
Case 5
objColor = Color.Brown
Case 6
objColor = Color.Gray
Case 7
objColor = Color.Maroon
Case Else
objColor = Color.Green
End Select
Return objColor
End Function
Hi Patrick,
You can get the values to fill the arrValues and arrValueNames from the
database, and put them on a collection (instead of using a fixed array).
Additionally, you can create a struct (a value type) to hold the pairs
[Value, Name], like the one as follows:
public struct GraphValue
{
public Name;
public Value;
}
Then, you can iterate through your collection of data (a collection filled
with data of the type [Value, Name] defined above) with a for each and make
the appropriate drawings en each case
As an example, this could be a refactored piece of the code (c#, sorry ;)),
using the collection of values
ArrayList GraphValueCollection = new ArrayList();
....
....
int colorCode = 0;
foreach(GraphValue graphValue in GraphValueCollection)
{
colorCode++;
objGraphics.FillRectangle(New SolidBrush(GetColor(colorCode)),
symbolLeg.X, symbolLeg.Y, 20, 10);
objGraphics.DrawRectangle(Pens.Black, symbolLeg.X, symbolLeg.Y, 20, 10)
objGraphics.DrawString(graphValue.Value, New Font("Tahoma", 10),
Brushes.Black, descLeg);
symbolLeg.Y += 15;
descLeg.Y += 15;
}
Regards,
Leon
"Patrick.O.Ige" wrote: I have a code below and its a PIE & BAR CHART.
The values now are all static but I want to be able to pull the values from
a database.
Can you guys give me some ideas to do this?
Thanks
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
'Declare your object variables
Dim i As Integer
'Build a BitMap that will act as the pallet and container
'for the bar graph. Here 600 is the width and 300 is the height.
'These values could also be passed as parameters.
Dim objBitMap As New Bitmap(400, 200)
'Declare your Graphics objects for painting graphics on you newly
created bitmap.
Dim objGraphics As Graphics
objGraphics = Graphics.FromImage(objBitMap)
'Set the background color to silver
objGraphics.Clear(Color.Silver)
'Build an array of values for the bar and pie chart.
'These values could also be pulled from a database.
' Retrieve Products Table
Dim arrValues(5) As Integer
arrValues(0) = 100
arrValues(1) = 135
arrValues(2) = 115
arrValues(3) = 125
arrValues(4) = 75
arrValues(5) = 300
Dim arrValueNames(5) As String
arrValueNames(0) = "Jan"
arrValueNames(1) = "Feb"
arrValueNames(2) = "Mar"
arrValueNames(3) = "Apr"
arrValueNames(4) = "May"
arrValueNames(5) = "June"
'Write out a title for your bar and pie chart.
objGraphics.DrawString("5 Month Projection Report", New
Font("Tahoma", 16), Brushes.Black, New PointF(5, 5))
'Create a legend to describe your bar and chart.
Dim symbolLeg As PointF = New PointF(335, 20)
Dim descLeg As PointF = New PointF(360, 16)
For i = 0 To arrValueNames.Length - 1
objGraphics.FillRectangle(New SolidBrush(GetColor(i)),
symbolLeg.X, symbolLeg.Y, 20, 10)
objGraphics.DrawRectangle(Pens.Black, symbolLeg.X, symbolLeg.Y,
20, 10)
objGraphics.DrawString(arrValueNames(i).ToString, New
Font("Tahoma", 10), Brushes.Black, descLeg)
symbolLeg.Y += 15
descLeg.Y += 15
Next i
'Loop through the values to create the Bar Chart.
For i = 0 To arrValues.Length - 1
objGraphics.FillRectangle(New SolidBrush(GetColor(i)), (i * 35)
+ 15, 200 - arrValues(i), 20, arrValues(i) + 5)
objGraphics.DrawRectangle(Pens.Black, (i * 35) + 15, 200 -
arrValues(i), 20, arrValues(i) + 5)
Next
'Loop through the values to create the Pie Chart.
Dim sglCurrentAngle As Single = 0
Dim sglTotalAngle As Single = 0
i = 0
For i = 0 To arrValues.Length - 1
'Current Value / (sum of all the Values) * 360 degree angle
sglCurrentAngle = arrValues(i) / 550 * 360
objGraphics.FillPie(New SolidBrush(GetColor(i)), 220, 95, 100,
100, sglTotalAngle, sglCurrentAngle)
objGraphics.DrawPie(Pens.Black, 220, 95, 100, 100,
sglTotalAngle, sglCurrentAngle)
sglTotalAngle += sglCurrentAngle
Next i
objBitMap.Save(Response.OutputStream, ImageFormat.Gif)
End Sub
'This function returns a color for the bar and pie charts.
Private Function GetColor(ByVal itemIndex As Integer) As Color
Dim objColor As Color
Select Case itemIndex
Case 0
objColor = Color.Blue
Case 1
objColor = Color.Red
Case 2
objColor = Color.Yellow
Case 3
objColor = Color.Purple
Case 4
objColor = Color.Orange
Case 5
objColor = Color.Brown
Case 6
objColor = Color.Gray
Case 7
objColor = Color.Maroon
Case Else
objColor = Color.Green
End Select
Return objColor
End Function
Thx Leon,
But can you please forward me a detailed code how to retrieve the values
from database.
Thanks
"Leon Welicki" <Le*********@discussions.microsoft.com> wrote in message
news:89**********************************@microsof t.com... Hi Patrick,
You can get the values to fill the arrValues and arrValueNames from the
database, and put them on a collection (instead of using a fixed array).
Additionally, you can create a struct (a value type) to hold the pairs
[Value, Name], like the one as follows:
public struct GraphValue
{
public Name;
public Value;
}
Then, you can iterate through your collection of data (a collection filled
with data of the type [Value, Name] defined above) with a for each and
make the appropriate drawings en each case
As an example, this could be a refactored piece of the code (c#, sorry
;)), using the collection of values
ArrayList GraphValueCollection = new ArrayList();
...
...
int colorCode = 0;
foreach(GraphValue graphValue in GraphValueCollection)
{
colorCode++;
objGraphics.FillRectangle(New SolidBrush(GetColor(colorCode)),
symbolLeg.X, symbolLeg.Y, 20, 10);
objGraphics.DrawRectangle(Pens.Black, symbolLeg.X, symbolLeg.Y, 20,
10)
objGraphics.DrawString(graphValue.Value, New Font("Tahoma", 10),
Brushes.Black, descLeg);
symbolLeg.Y += 15;
descLeg.Y += 15;
}
Regards,
Leon
"Patrick.O.Ige" wrote:
I have a code below and its a PIE & BAR CHART.
The values now are all static but I want to be able to pull the values
from a database.
Can you guys give me some ideas to do this?
Thanks
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
'Declare your object variables
Dim i As Integer
'Build a BitMap that will act as the pallet and container
'for the bar graph. Here 600 is the width and 300 is the height.
'These values could also be passed as parameters.
Dim objBitMap As New Bitmap(400, 200)
'Declare your Graphics objects for painting graphics on you
newly created bitmap.
Dim objGraphics As Graphics
objGraphics = Graphics.FromImage(objBitMap)
'Set the background color to silver
objGraphics.Clear(Color.Silver)
'Build an array of values for the bar and pie chart.
'These values could also be pulled from a database.
' Retrieve Products Table
Dim arrValues(5) As Integer
arrValues(0) = 100
arrValues(1) = 135
arrValues(2) = 115
arrValues(3) = 125
arrValues(4) = 75
arrValues(5) = 300
Dim arrValueNames(5) As String
arrValueNames(0) = "Jan"
arrValueNames(1) = "Feb"
arrValueNames(2) = "Mar"
arrValueNames(3) = "Apr"
arrValueNames(4) = "May"
arrValueNames(5) = "June"
'Write out a title for your bar and pie chart.
objGraphics.DrawString("5 Month Projection Report", New
Font("Tahoma", 16), Brushes.Black, New PointF(5, 5))
'Create a legend to describe your bar and chart.
Dim symbolLeg As PointF = New PointF(335, 20)
Dim descLeg As PointF = New PointF(360, 16)
For i = 0 To arrValueNames.Length - 1
objGraphics.FillRectangle(New SolidBrush(GetColor(i)),
symbolLeg.X, symbolLeg.Y, 20, 10)
objGraphics.DrawRectangle(Pens.Black, symbolLeg.X,
symbolLeg.Y, 20, 10)
objGraphics.DrawString(arrValueNames(i).ToString, New
Font("Tahoma", 10), Brushes.Black, descLeg)
symbolLeg.Y += 15
descLeg.Y += 15
Next i
'Loop through the values to create the Bar Chart.
For i = 0 To arrValues.Length - 1
objGraphics.FillRectangle(New SolidBrush(GetColor(i)), (i *
35) + 15, 200 - arrValues(i), 20, arrValues(i) + 5)
objGraphics.DrawRectangle(Pens.Black, (i * 35) + 15, 200 -
arrValues(i), 20, arrValues(i) + 5)
Next
'Loop through the values to create the Pie Chart.
Dim sglCurrentAngle As Single = 0
Dim sglTotalAngle As Single = 0
i = 0
For i = 0 To arrValues.Length - 1
'Current Value / (sum of all the Values) * 360 degree angle
sglCurrentAngle = arrValues(i) / 550 * 360
objGraphics.FillPie(New SolidBrush(GetColor(i)), 220, 95,
100, 100, sglTotalAngle, sglCurrentAngle)
objGraphics.DrawPie(Pens.Black, 220, 95, 100, 100,
sglTotalAngle, sglCurrentAngle)
sglTotalAngle += sglCurrentAngle
Next i
objBitMap.Save(Response.OutputStream, ImageFormat.Gif)
End Sub
'This function returns a color for the bar and pie charts.
Private Function GetColor(ByVal itemIndex As Integer) As Color
Dim objColor As Color
Select Case itemIndex
Case 0
objColor = Color.Blue
Case 1
objColor = Color.Red
Case 2
objColor = Color.Yellow
Case 3
objColor = Color.Purple
Case 4
objColor = Color.Orange
Case 5
objColor = Color.Brown
Case 6
objColor = Color.Gray
Case 7
objColor = Color.Maroon
Case Else
objColor = Color.Green
End Select
Return objColor
End Function
Here, you´ve got a function that returns an ArrayList filled with the Graph
Data from a Sql Server DataBase
using System;
using System.Data;
using System.Data.SqlClient;
using System.Collections;
public ArrayList GetGraphData()
{
// Create the SQL Connection and Command Objects
string connectionString =
"Server=yoursever;UID=yourUID;PWD=yourPWD;Database =yourDB";
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand command = new SqlCommand();
SqlDataReader reader = null;
// create the graphdata collecion instance
ArrayList graphDataCollection = new ArrayList();
try
{
// open the connection
connection.Open();
// establish the sql sentence to the command
command.CommandText = "SELECT fieldName, fieldValue FROM myTable";
// bind the command and the connection
command.Connection = connection;
// fetch the data in a DataReader
reader = command.ExecuteReader(CommandBehavior.SequentialAc cess);
// while there is data left to read...
while (reader.Read())
{ // add data to the
collection graphDataCollection.Add(new GraphData(reader.GetString(0),
reader.GetInt32(1)));
}
}
finally
{
// close and release all data access objects
if (reader != null)
reader.Close();
connection.Close();
command.Dispose();
connection.Dispose();
}
// return the graph data
return graphDataCollection;
}
Be carefull with the data that is returned by your query. According to the
piece of code above, it must return a string field and then and integer field.
You have also to define this struct:
public struct GraphData
{
public string Name;
public double Value;
public GraphData(string name, double val)
{
this.Name = name;
this.Value = val;
}
}
Regards,
Leon
"Patrick.O.Ige" wrote: Thx Leon,
But can you please forward me a detailed code how to retrieve the values
from database.
Thanks
"Leon Welicki" <Le*********@discussions.microsoft.com> wrote in message
news:89**********************************@microsof t.com... Hi Patrick,
You can get the values to fill the arrValues and arrValueNames from the
database, and put them on a collection (instead of using a fixed array).
Additionally, you can create a struct (a value type) to hold the pairs
[Value, Name], like the one as follows:
public struct GraphValue
{
public Name;
public Value;
}
Then, you can iterate through your collection of data (a collection filled
with data of the type [Value, Name] defined above) with a for each and
make the appropriate drawings en each case
As an example, this could be a refactored piece of the code (c#, sorry
;)), using the collection of values
ArrayList GraphValueCollection = new ArrayList();
...
...
int colorCode = 0;
foreach(GraphValue graphValue in GraphValueCollection)
{
colorCode++;
objGraphics.FillRectangle(New SolidBrush(GetColor(colorCode)),
symbolLeg.X, symbolLeg.Y, 20, 10);
objGraphics.DrawRectangle(Pens.Black, symbolLeg.X, symbolLeg.Y, 20,
10)
objGraphics.DrawString(graphValue.Value, New Font("Tahoma", 10),
Brushes.Black, descLeg);
symbolLeg.Y += 15;
descLeg.Y += 15;
}
Regards,
Leon
"Patrick.O.Ige" wrote:
I have a code below and its a PIE & BAR CHART.
The values now are all static but I want to be able to pull the values from a database.
Can you guys give me some ideas to do this?
Thanks
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
'Declare your object variables
Dim i As Integer
'Build a BitMap that will act as the pallet and container
'for the bar graph. Here 600 is the width and 300 is the height.
'These values could also be passed as parameters.
Dim objBitMap As New Bitmap(400, 200)
'Declare your Graphics objects for painting graphics on you newly created bitmap.
Dim objGraphics As Graphics
objGraphics = Graphics.FromImage(objBitMap)
'Set the background color to silver
objGraphics.Clear(Color.Silver)
'Build an array of values for the bar and pie chart.
'These values could also be pulled from a database.
' Retrieve Products Table
Dim arrValues(5) As Integer
arrValues(0) = 100
arrValues(1) = 135
arrValues(2) = 115
arrValues(3) = 125
arrValues(4) = 75
arrValues(5) = 300
Dim arrValueNames(5) As String
arrValueNames(0) = "Jan"
arrValueNames(1) = "Feb"
arrValueNames(2) = "Mar"
arrValueNames(3) = "Apr"
arrValueNames(4) = "May"
arrValueNames(5) = "June"
'Write out a title for your bar and pie chart.
objGraphics.DrawString("5 Month Projection Report", New
Font("Tahoma", 16), Brushes.Black, New PointF(5, 5))
'Create a legend to describe your bar and chart.
Dim symbolLeg As PointF = New PointF(335, 20)
Dim descLeg As PointF = New PointF(360, 16)
For i = 0 To arrValueNames.Length - 1
objGraphics.FillRectangle(New SolidBrush(GetColor(i)),
symbolLeg.X, symbolLeg.Y, 20, 10)
objGraphics.DrawRectangle(Pens.Black, symbolLeg.X, symbolLeg.Y, 20, 10)
objGraphics.DrawString(arrValueNames(i).ToString, New
Font("Tahoma", 10), Brushes.Black, descLeg)
symbolLeg.Y += 15
descLeg.Y += 15
Next i
'Loop through the values to create the Bar Chart.
For i = 0 To arrValues.Length - 1
objGraphics.FillRectangle(New SolidBrush(GetColor(i)), (i * 35) + 15, 200 - arrValues(i), 20, arrValues(i) + 5)
objGraphics.DrawRectangle(Pens.Black, (i * 35) + 15, 200 -
arrValues(i), 20, arrValues(i) + 5)
Next
'Loop through the values to create the Pie Chart.
Dim sglCurrentAngle As Single = 0
Dim sglTotalAngle As Single = 0
i = 0
For i = 0 To arrValues.Length - 1
'Current Value / (sum of all the Values) * 360 degree angle
sglCurrentAngle = arrValues(i) / 550 * 360
objGraphics.FillPie(New SolidBrush(GetColor(i)), 220, 95, 100, 100, sglTotalAngle, sglCurrentAngle)
objGraphics.DrawPie(Pens.Black, 220, 95, 100, 100,
sglTotalAngle, sglCurrentAngle)
sglTotalAngle += sglCurrentAngle
Next i
objBitMap.Save(Response.OutputStream, ImageFormat.Gif)
End Sub
'This function returns a color for the bar and pie charts.
Private Function GetColor(ByVal itemIndex As Integer) As Color
Dim objColor As Color
Select Case itemIndex
Case 0
objColor = Color.Blue
Case 1
objColor = Color.Red
Case 2
objColor = Color.Yellow
Case 3
objColor = Color.Purple
Case 4
objColor = Color.Orange
Case 5
objColor = Color.Brown
Case 6
objColor = Color.Gray
Case 7
objColor = Color.Maroon
Case Else
objColor = Color.Green
End Select
Return objColor
End Function
Thanks alot Leon
Will try that!
"Leon Welicki" wrote: Here, you´ve got a function that returns an ArrayList filled with the Graph
Data from a Sql Server DataBase
using System;
using System.Data;
using System.Data.SqlClient;
using System.Collections;
public ArrayList GetGraphData()
{
// Create the SQL Connection and Command Objects
string connectionString =
"Server=yoursever;UID=yourUID;PWD=yourPWD;Database =yourDB";
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand command = new SqlCommand();
SqlDataReader reader = null;
// create the graphdata collecion instance
ArrayList graphDataCollection = new ArrayList();
try
{
// open the connection
connection.Open();
// establish the sql sentence to the command
command.CommandText = "SELECT fieldName, fieldValue FROM myTable";
// bind the command and the connection
command.Connection = connection;
// fetch the data in a DataReader
reader = command.ExecuteReader(CommandBehavior.SequentialAc cess);
// while there is data left to read...
while (reader.Read())
{ // add data to the
collection graphDataCollection.Add(new GraphData(reader.GetString(0),
reader.GetInt32(1)));
}
}
finally
{
// close and release all data access objects
if (reader != null)
reader.Close();
connection.Close();
command.Dispose();
connection.Dispose();
}
// return the graph data
return graphDataCollection;
}
Be carefull with the data that is returned by your query. According to the
piece of code above, it must return a string field and then and integer field.
You have also to define this struct:
public struct GraphData
{
public string Name;
public double Value;
public GraphData(string name, double val)
{
this.Name = name;
this.Value = val;
}
}
Regards,
Leon
"Patrick.O.Ige" wrote:
Thx Leon,
But can you please forward me a detailed code how to retrieve the values
from database.
Thanks
"Leon Welicki" <Le*********@discussions.microsoft.com> wrote in message
news:89**********************************@microsof t.com... Hi Patrick,
You can get the values to fill the arrValues and arrValueNames from the
database, and put them on a collection (instead of using a fixed array).
Additionally, you can create a struct (a value type) to hold the pairs
[Value, Name], like the one as follows:
public struct GraphValue
{
public Name;
public Value;
}
Then, you can iterate through your collection of data (a collection filled
with data of the type [Value, Name] defined above) with a for each and
make the appropriate drawings en each case
As an example, this could be a refactored piece of the code (c#, sorry
;)), using the collection of values
ArrayList GraphValueCollection = new ArrayList();
...
...
int colorCode = 0;
foreach(GraphValue graphValue in GraphValueCollection)
{
colorCode++;
objGraphics.FillRectangle(New SolidBrush(GetColor(colorCode)),
symbolLeg.X, symbolLeg.Y, 20, 10);
objGraphics.DrawRectangle(Pens.Black, symbolLeg.X, symbolLeg.Y, 20,
10)
objGraphics.DrawString(graphValue.Value, New Font("Tahoma", 10),
Brushes.Black, descLeg);
symbolLeg.Y += 15;
descLeg.Y += 15;
}
Regards,
Leon
"Patrick.O.Ige" wrote:
> I have a code below and its a PIE & BAR CHART.
> The values now are all static but I want to be able to pull the values
from > a database.
> Can you guys give me some ideas to do this?
> Thanks
>
>
> Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
> System.EventArgs) Handles MyBase.Load
> 'Declare your object variables
>
> Dim i As Integer
>
>
>
> 'Build a BitMap that will act as the pallet and container
>
> 'for the bar graph. Here 600 is the width and 300 is the height.
>
> 'These values could also be passed as parameters.
>
> Dim objBitMap As New Bitmap(400, 200)
>
>
>
> 'Declare your Graphics objects for painting graphics on you
newly > created bitmap.
>
> Dim objGraphics As Graphics
>
> objGraphics = Graphics.FromImage(objBitMap)
>
> 'Set the background color to silver
>
> objGraphics.Clear(Color.Silver)
>
>
>
> 'Build an array of values for the bar and pie chart.
>
> 'These values could also be pulled from a database.
> ' Retrieve Products Table
>
>
> Dim arrValues(5) As Integer
>
> arrValues(0) = 100
>
> arrValues(1) = 135
>
> arrValues(2) = 115
>
> arrValues(3) = 125
>
> arrValues(4) = 75
>
> arrValues(5) = 300
>
>
> Dim arrValueNames(5) As String
>
> arrValueNames(0) = "Jan"
>
> arrValueNames(1) = "Feb"
>
> arrValueNames(2) = "Mar"
>
> arrValueNames(3) = "Apr"
>
> arrValueNames(4) = "May"
>
> arrValueNames(5) = "June"
>
>
>
>
> 'Write out a title for your bar and pie chart.
> objGraphics.DrawString("5 Month Projection Report", New
> Font("Tahoma", 16), Brushes.Black, New PointF(5, 5))
>
>
>
> 'Create a legend to describe your bar and chart.
>
> Dim symbolLeg As PointF = New PointF(335, 20)
>
> Dim descLeg As PointF = New PointF(360, 16)
>
>
>
> For i = 0 To arrValueNames.Length - 1
>
> objGraphics.FillRectangle(New SolidBrush(GetColor(i)),
> symbolLeg.X, symbolLeg.Y, 20, 10)
>
> objGraphics.DrawRectangle(Pens.Black, symbolLeg.X,
symbolLeg.Y, > 20, 10)
>
>
>
> objGraphics.DrawString(arrValueNames(i).ToString, New
> Font("Tahoma", 10), Brushes.Black, descLeg)
>
> symbolLeg.Y += 15
>
> descLeg.Y += 15
>
> Next i
>
>
>
> 'Loop through the values to create the Bar Chart.
>
> For i = 0 To arrValues.Length - 1
>
> objGraphics.FillRectangle(New SolidBrush(GetColor(i)), (i *
35) > + 15, 200 - arrValues(i), 20, arrValues(i) + 5)
>
> objGraphics.DrawRectangle(Pens.Black, (i * 35) + 15, 200 -
> arrValues(i), 20, arrValues(i) + 5)
>
> Next
>
>
>
> 'Loop through the values to create the Pie Chart.
>
> Dim sglCurrentAngle As Single = 0
>
> Dim sglTotalAngle As Single = 0
>
> i = 0
>
>
>
> For i = 0 To arrValues.Length - 1
>
> 'Current Value / (sum of all the Values) * 360 degree angle
>
> sglCurrentAngle = arrValues(i) / 550 * 360
>
>
>
> objGraphics.FillPie(New SolidBrush(GetColor(i)), 220, 95,
100, > 100, sglTotalAngle, sglCurrentAngle)
>
> objGraphics.DrawPie(Pens.Black, 220, 95, 100, 100,
> sglTotalAngle, sglCurrentAngle)
>
>
>
> sglTotalAngle += sglCurrentAngle
>
> Next i
>
>
>
> objBitMap.Save(Response.OutputStream, ImageFormat.Gif)
>
> End Sub
>
> 'This function returns a color for the bar and pie charts.
>
> Private Function GetColor(ByVal itemIndex As Integer) As Color
>
> Dim objColor As Color
>
>
>
> Select Case itemIndex
>
> Case 0
>
> objColor = Color.Blue
>
> Case 1
>
> objColor = Color.Red
>
> Case 2
>
> objColor = Color.Yellow
>
> Case 3
>
> objColor = Color.Purple
>
> Case 4
>
> objColor = Color.Orange
>
> Case 5
>
> objColor = Color.Brown
>
> Case 6
>
> objColor = Color.Gray
>
> Case 7
>
> objColor = Color.Maroon
>
> Case Else
>
> objColor = Color.Green
>
> End Select
>
>
>
> Return objColor
>
>
>
> End Function
>
>
Hi Leon,
Sorry but more questions for you relating to these Pie, Bar charts..
Help if u can!
Thx
Question 1
-------------
I have got the Data set as you adviced using the "GetGraphData()".
But i defined the struct like this (Any idea if its ok and would i also need
to define a struct for the GraphValue):-
Public Structure GraphData
Public Name As String
Public Value As Double
Public Sub New(ByVal arrValueNames As String, ByVal arrValues As
Double)
Me.Name = arrValueNames
Me.Value = arrValues
End Sub
End Structure
Question 2
---------------------------------
I used these code below to create the Pie and Bar charts.
How would i iterate through the DataCollection.
Can you give me some ideas ?
'Create a legend to describe your bar and chart.
'symbolLeg represents the(position) stats near the calender
Dim symbolLeg As PointF = New PointF(335, 20)
'desc represents the (position)Months printed
Dim descLeg As PointF = New PointF(360, 16)
For i = 0 To arrValueNames.Length - 1
objGraphics.FillRectangle(New SolidBrush(GetColor(i)),
symbolLeg.X, symbolLeg.Y, 20, 10)
objGraphics.DrawRectangle(Pens.Black, symbolLeg.X, symbolLeg.Y,
20, 10)
objGraphics.DrawString(arrValueNames(i).ToString, New
Font("Tahoma", 10), Brushes.Black, descLeg)
symbolLeg.Y += 15
descLeg.Y += 15
Next i
'Loop through the values to create the Bar Chart.
For i = 0 To arrValues.Length - 1
objGraphics.FillRectangle(New SolidBrush(GetColor(i)), (i * 35)
+ 15, 200 - arrValues(i), 20, arrValues(i) + 5)
objGraphics.DrawRectangle(Pens.Black, (i * 35) + 15, 200 -
arrValues(i), 20, arrValues(i) + 5)
Next
'Loop through the values to create the Pie Chart.
Dim sglCurrentAngle As Single = 0
Dim sglTotalAngle As Single = 0
i = 0
For i = 0 To arrValues.Length - 1
'Current Value / (sum of all the Values) * 360 degree angle
sglCurrentAngle = arrValues(i) / 550 * 360
objGraphics.FillPie(New SolidBrush(GetColor(i)), 220, 95, 100,
100, sglTotalAngle, sglCurrentAngle)
objGraphics.DrawPie(Pens.Black, 220, 95, 100, 100,
sglTotalAngle, sglCurrentAngle)
sglTotalAngle += sglCurrentAngle
Next i
"Leon Welicki" wrote: Here, you´ve got a function that returns an ArrayList filled with the Graph
Data from a Sql Server DataBase
using System;
using System.Data;
using System.Data.SqlClient;
using System.Collections;
public ArrayList GetGraphData()
{
// Create the SQL Connection and Command Objects
string connectionString =
"Server=yoursever;UID=yourUID;PWD=yourPWD;Database =yourDB";
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand command = new SqlCommand();
SqlDataReader reader = null;
// create the graphdata collecion instance
ArrayList graphDataCollection = new ArrayList();
try
{
// open the connection
connection.Open();
// establish the sql sentence to the command
command.CommandText = "SELECT fieldName, fieldValue FROM myTable";
// bind the command and the connection
command.Connection = connection;
// fetch the data in a DataReader
reader = command.ExecuteReader(CommandBehavior.SequentialAc cess);
// while there is data left to read...
while (reader.Read())
{ // add data to the
collection graphDataCollection.Add(new GraphData(reader.GetString(0),
reader.GetInt32(1)));
}
}
finally
{
// close and release all data access objects
if (reader != null)
reader.Close();
connection.Close();
command.Dispose();
connection.Dispose();
}
// return the graph data
return graphDataCollection;
}
Be carefull with the data that is returned by your query. According to the
piece of code above, it must return a string field and then and integer field.
You have also to define this struct:
public struct GraphData
{
public string Name;
public double Value;
public GraphData(string name, double val)
{
this.Name = name;
this.Value = val;
}
}
Regards,
Leon
"Patrick.O.Ige" wrote:
Thx Leon,
But can you please forward me a detailed code how to retrieve the values
from database.
Thanks
"Leon Welicki" <Le*********@discussions.microsoft.com> wrote in message
news:89**********************************@microsof t.com... Hi Patrick,
You can get the values to fill the arrValues and arrValueNames from the
database, and put them on a collection (instead of using a fixed array).
Additionally, you can create a struct (a value type) to hold the pairs
[Value, Name], like the one as follows:
public struct GraphValue
{
public Name;
public Value;
}
Then, you can iterate through your collection of data (a collection filled
with data of the type [Value, Name] defined above) with a for each and
make the appropriate drawings en each case
As an example, this could be a refactored piece of the code (c#, sorry
;)), using the collection of values
ArrayList GraphValueCollection = new ArrayList();
...
...
int colorCode = 0;
foreach(GraphValue graphValue in GraphValueCollection)
{
colorCode++;
objGraphics.FillRectangle(New SolidBrush(GetColor(colorCode)),
symbolLeg.X, symbolLeg.Y, 20, 10);
objGraphics.DrawRectangle(Pens.Black, symbolLeg.X, symbolLeg.Y, 20,
10)
objGraphics.DrawString(graphValue.Value, New Font("Tahoma", 10),
Brushes.Black, descLeg);
symbolLeg.Y += 15;
descLeg.Y += 15;
}
Regards,
Leon
"Patrick.O.Ige" wrote:
> I have a code below and its a PIE & BAR CHART.
> The values now are all static but I want to be able to pull the values
from > a database.
> Can you guys give me some ideas to do this?
> Thanks
>
>
> Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
> System.EventArgs) Handles MyBase.Load
> 'Declare your object variables
>
> Dim i As Integer
>
>
>
> 'Build a BitMap that will act as the pallet and container
>
> 'for the bar graph. Here 600 is the width and 300 is the height.
>
> 'These values could also be passed as parameters.
>
> Dim objBitMap As New Bitmap(400, 200)
>
>
>
> 'Declare your Graphics objects for painting graphics on you
newly > created bitmap.
>
> Dim objGraphics As Graphics
>
> objGraphics = Graphics.FromImage(objBitMap)
>
> 'Set the background color to silver
>
> objGraphics.Clear(Color.Silver)
>
>
>
> 'Build an array of values for the bar and pie chart.
>
> 'These values could also be pulled from a database.
> ' Retrieve Products Table
>
>
> Dim arrValues(5) As Integer
>
> arrValues(0) = 100
>
> arrValues(1) = 135
>
> arrValues(2) = 115
>
> arrValues(3) = 125
>
> arrValues(4) = 75
>
> arrValues(5) = 300
>
>
> Dim arrValueNames(5) As String
>
> arrValueNames(0) = "Jan"
>
> arrValueNames(1) = "Feb"
>
> arrValueNames(2) = "Mar"
>
> arrValueNames(3) = "Apr"
>
> arrValueNames(4) = "May"
>
> arrValueNames(5) = "June"
>
>
>
>
> 'Write out a title for your bar and pie chart.
> objGraphics.DrawString("5 Month Projection Report", New
> Font("Tahoma", 16), Brushes.Black, New PointF(5, 5))
>
>
>
> 'Create a legend to describe your bar and chart.
>
> Dim symbolLeg As PointF = New PointF(335, 20)
>
> Dim descLeg As PointF = New PointF(360, 16)
>
>
>
> For i = 0 To arrValueNames.Length - 1
>
> objGraphics.FillRectangle(New SolidBrush(GetColor(i)),
> symbolLeg.X, symbolLeg.Y, 20, 10)
>
> objGraphics.DrawRectangle(Pens.Black, symbolLeg.X,
symbolLeg.Y, > 20, 10)
>
>
>
> objGraphics.DrawString(arrValueNames(i).ToString, New
> Font("Tahoma", 10), Brushes.Black, descLeg)
>
> symbolLeg.Y += 15
>
> descLeg.Y += 15
>
> Next i
>
>
>
> 'Loop through the values to create the Bar Chart.
>
> For i = 0 To arrValues.Length - 1
>
> objGraphics.FillRectangle(New SolidBrush(GetColor(i)), (i *
35) > + 15, 200 - arrValues(i), 20, arrValues(i) + 5)
>
> objGraphics.DrawRectangle(Pens.Black, (i * 35) + 15, 200 -
> arrValues(i), 20, arrValues(i) + 5)
>
> Next
>
>
>
> 'Loop through the values to create the Pie Chart.
>
> Dim sglCurrentAngle As Single = 0
>
> Dim sglTotalAngle As Single = 0
>
> i = 0
>
>
>
> For i = 0 To arrValues.Length - 1
>
> 'Current Value / (sum of all the Values) * 360 degree angle
>
> sglCurrentAngle = arrValues(i) / 550 * 360
>
>
>
> objGraphics.FillPie(New SolidBrush(GetColor(i)), 220, 95,
100, > 100, sglTotalAngle, sglCurrentAngle)
>
> objGraphics.DrawPie(Pens.Black, 220, 95, 100, 100,
> sglTotalAngle, sglCurrentAngle)
>
>
>
> sglTotalAngle += sglCurrentAngle
>
> Next i
>
>
>
> objBitMap.Save(Response.OutputStream, ImageFormat.Gif)
>
> End Sub
>
> 'This function returns a color for the bar and pie charts.
>
> Private Function GetColor(ByVal itemIndex As Integer) As Color
>
> Dim objColor As Color
>
>
>
> Select Case itemIndex
>
> Case 0
>
> objColor = Color.Blue
>
> Case 1
>
> objColor = Color.Red
>
> Case 2
>
> objColor = Color.Yellow
>
> Case 3
>
> objColor = Color.Purple
>
> Case 4
>
> objColor = Color.Orange
>
> Case 5
>
> objColor = Color.Brown
>
> Case 6
>
> objColor = Color.Gray
>
> Case 7
>
> objColor = Color.Maroon
>
> Case Else
>
> objColor = Color.Green
>
> End Select
>
>
>
> Return objColor
>
>
>
> End Function
>
>
Hi Leon,
I have tried something out with ur ideas but it looks like NO Data is
getting to the charts..
If u can go trhough the code.
Thanks
Code Below:-
-----------------
Public Class Chartdb
Inherits System.Web.UI.Page
Dim graphDataCollection As ArrayList = New ArrayList
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub
InitializeComponent()
End Sub
'NOTE: The following placeholder declaration is required by the Web Form
Designer.
'Do not delete or move it.
Private designerPlaceholderDeclaration As System.Object
Private Sub Page_Init(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Init
'CODEGEN: This method call is required by the Web Form Designer
'Do not modify it using the code editor.
InitializeComponent()
End Sub
#End Region
Public Structure GraphData
Public Name As String
Public Value As Double
Public Sub New(ByVal arrValueNames As String, ByVal arrValues As
Double)
Me.Name = arrValueNames
Me.Value = arrValues
End Sub
End Structure
Public Function GetGraphData() As ArrayList
' Create the SQL Connection and Command Objects
Dim connectionString As String
connectionString = "server=(local);database=Northwind;integrated
security=true;"
Dim connection As SqlConnection = New SqlConnection(connectionString)
Dim command As SqlCommand = New SqlCommand
Dim reader As SqlDataReader = Nothing
' create the graphdata collecion instance
Try
' open the connection
connection.Open()
' establish the sql sentence to the command
command.CommandText = "SELECT arrValues,arrValueNames FROM Charts"
' bind the command and the connection
command.Connection = connection
' fetch the data in a DataReader
reader = command.ExecuteReader(CommandBehavior.SequentialAc cess)
' while there is data left to read...
While reader.Read()
'add data to the collection
graphDataCollection.Add(New GraphData(reader.GetString(0),
reader.GetInt32(1)))
End While
Finally
' close and release all data access objects
If Not reader Is Nothing Then
reader.Close()
End If
connection.Close()
command.Dispose()
connection.Dispose()
End Try
' return the graph data
Return graphDataCollection
End Function
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
Dim objBitMap As New Bitmap(400, 200)
Dim objGraphics As Graphics
objGraphics = Graphics.FromImage(objBitMap)
objGraphics.Clear(Color.Azure)
'Write out a title for your bar and pie chart.
objGraphics.DrawString("5 Month Projection Report", New
Font("Tahoma", 16), Brushes.Black, New PointF(5, 5))
'Create a legend to describe your bar and chart.
'symbolLeg represents the(position) stats near the calender
Dim symbolLeg As PointF = New PointF(335, 20)
'desc represents the (position)Months printed
Dim descLeg As PointF = New PointF(360, 16)
Dim colorCode As Integer = 0
Dim arrValueNames As GraphData
'Dim graphDataCollection As ArrayList = New ArrayList
For Each arrValueNames In graphDataCollection
colorCode = colorCode + 1
objGraphics.FillRectangle(New SolidBrush(GetColor(colorCode)),
symbolLeg.X, symbolLeg.Y, 20, 10)
objGraphics.DrawRectangle(Pens.Black, symbolLeg.X, symbolLeg.Y,
20, 10)
objGraphics.DrawString(arrValueNames.ToString, New
Font("Tahoma", 10), Brushes.Black, descLeg)
symbolLeg.Y += 15
descLeg.Y += 15
Next
'Loop through the values to create the Bar Chart.
'For i = 0 To arrValues.Length - 1
'objGraphics.FillRectangle(New SolidBrush(GetColor(i)), (i * 35) +
15, 200 - arrValues(i), 20, arrValues(i) + 5)
'objGraphics.DrawRectangle(Pens.Black, (i * 35) + 15, 200 -
arrValues(i), 20, arrValues(i) + 5)
'Next
objBitMap.Save(Response.OutputStream, ImageFormat.Gif)
End Sub
Private Function GetColor(ByVal itemIndex As Integer) As Color
Dim objColor As Color
Select Case itemIndex
Case 0
objColor = Color.Blue
Case 1
objColor = Color.Red
Case 2
objColor = Color.Yellow
Case 3
objColor = Color.Purple
Case 4
objColor = Color.Orange
Case 5
objColor = Color.Brown
Case 6
objColor = Color.Gray
Case 7
objColor = Color.Maroon
Case Else
objColor = Color.Green
End Select
Return objColor
End Function
End Class
"Leon Welicki" wrote: Here, you´ve got a function that returns an ArrayList filled with the Graph
Data from a Sql Server DataBase
using System;
using System.Data;
using System.Data.SqlClient;
using System.Collections;
public ArrayList GetGraphData()
{
// Create the SQL Connection and Command Objects
string connectionString =
"Server=yoursever;UID=yourUID;PWD=yourPWD;Database =yourDB";
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand command = new SqlCommand();
SqlDataReader reader = null;
// create the graphdata collecion instance
ArrayList graphDataCollection = new ArrayList();
try
{
// open the connection
connection.Open();
// establish the sql sentence to the command
command.CommandText = "SELECT fieldName, fieldValue FROM myTable";
// bind the command and the connection
command.Connection = connection;
// fetch the data in a DataReader
reader = command.ExecuteReader(CommandBehavior.SequentialAc cess);
// while there is data left to read...
while (reader.Read())
{ // add data to the
collection graphDataCollection.Add(new GraphData(reader.GetString(0),
reader.GetInt32(1)));
}
}
finally
{
// close and release all data access objects
if (reader != null)
reader.Close();
connection.Close();
command.Dispose();
connection.Dispose();
}
// return the graph data
return graphDataCollection;
}
Be carefull with the data that is returned by your query. According to the
piece of code above, it must return a string field and then and integer field.
You have also to define this struct:
public struct GraphData
{
public string Name;
public double Value;
public GraphData(string name, double val)
{
this.Name = name;
this.Value = val;
}
}
Regards,
Leon
"Patrick.O.Ige" wrote:
Thx Leon,
But can you please forward me a detailed code how to retrieve the values
from database.
Thanks
"Leon Welicki" <Le*********@discussions.microsoft.com> wrote in message
news:89**********************************@microsof t.com... Hi Patrick,
You can get the values to fill the arrValues and arrValueNames from the
database, and put them on a collection (instead of using a fixed array).
Additionally, you can create a struct (a value type) to hold the pairs
[Value, Name], like the one as follows:
public struct GraphValue
{
public Name;
public Value;
}
Then, you can iterate through your collection of data (a collection filled
with data of the type [Value, Name] defined above) with a for each and
make the appropriate drawings en each case
As an example, this could be a refactored piece of the code (c#, sorry
;)), using the collection of values
ArrayList GraphValueCollection = new ArrayList();
...
...
int colorCode = 0;
foreach(GraphValue graphValue in GraphValueCollection)
{
colorCode++;
objGraphics.FillRectangle(New SolidBrush(GetColor(colorCode)),
symbolLeg.X, symbolLeg.Y, 20, 10);
objGraphics.DrawRectangle(Pens.Black, symbolLeg.X, symbolLeg.Y, 20,
10)
objGraphics.DrawString(graphValue.Value, New Font("Tahoma", 10),
Brushes.Black, descLeg);
symbolLeg.Y += 15;
descLeg.Y += 15;
}
Regards,
Leon
"Patrick.O.Ige" wrote:
> I have a code below and its a PIE & BAR CHART.
> The values now are all static but I want to be able to pull the values
from > a database.
> Can you guys give me some ideas to do this?
> Thanks
>
>
> Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
> System.EventArgs) Handles MyBase.Load
> 'Declare your object variables
>
> Dim i As Integer
>
>
>
> 'Build a BitMap that will act as the pallet and container
>
> 'for the bar graph. Here 600 is the width and 300 is the height.
>
> 'These values could also be passed as parameters.
>
> Dim objBitMap As New Bitmap(400, 200)
>
>
>
> 'Declare your Graphics objects for painting graphics on you
newly > created bitmap.
>
> Dim objGraphics As Graphics
>
> objGraphics = Graphics.FromImage(objBitMap)
>
> 'Set the background color to silver
>
> objGraphics.Clear(Color.Silver)
>
>
>
> 'Build an array of values for the bar and pie chart.
>
> 'These values could also be pulled from a database.
> ' Retrieve Products Table
>
>
> Dim arrValues(5) As Integer
>
> arrValues(0) = 100
>
> arrValues(1) = 135
>
> arrValues(2) = 115
>
> arrValues(3) = 125
>
> arrValues(4) = 75
>
> arrValues(5) = 300
>
>
> Dim arrValueNames(5) As String
>
> arrValueNames(0) = "Jan"
>
> arrValueNames(1) = "Feb"
>
> arrValueNames(2) = "Mar"
>
> arrValueNames(3) = "Apr"
>
> arrValueNames(4) = "May"
>
> arrValueNames(5) = "June"
>
>
>
>
> 'Write out a title for your bar and pie chart.
> objGraphics.DrawString("5 Month Projection Report", New
> Font("Tahoma", 16), Brushes.Black, New PointF(5, 5))
>
>
>
> 'Create a legend to describe your bar and chart.
>
> Dim symbolLeg As PointF = New PointF(335, 20)
>
> Dim descLeg As PointF = New PointF(360, 16)
>
>
>
> For i = 0 To arrValueNames.Length - 1
>
> objGraphics.FillRectangle(New SolidBrush(GetColor(i)),
> symbolLeg.X, symbolLeg.Y, 20, 10)
>
> objGraphics.DrawRectangle(Pens.Black, symbolLeg.X,
symbolLeg.Y, > 20, 10)
>
>
>
> objGraphics.DrawString(arrValueNames(i).ToString, New
> Font("Tahoma", 10), Brushes.Black, descLeg)
>
> symbolLeg.Y += 15
>
> descLeg.Y += 15
>
> Next i
>
>
>
> 'Loop through the values to create the Bar Chart.
>
> For i = 0 To arrValues.Length - 1
>
> objGraphics.FillRectangle(New SolidBrush(GetColor(i)), (i *
35) > + 15, 200 - arrValues(i), 20, arrValues(i) + 5)
>
> objGraphics.DrawRectangle(Pens.Black, (i * 35) + 15, 200 -
> arrValues(i), 20, arrValues(i) + 5)
>
> Next
>
>
>
> 'Loop through the values to create the Pie Chart.
>
> Dim sglCurrentAngle As Single = 0
>
> Dim sglTotalAngle As Single = 0
>
> i = 0
>
>
>
> For i = 0 To arrValues.Length - 1
>
> 'Current Value / (sum of all the Values) * 360 degree angle
>
> sglCurrentAngle = arrValues(i) / 550 * 360
>
>
>
> objGraphics.FillPie(New SolidBrush(GetColor(i)), 220, 95,
100, > 100, sglTotalAngle, sglCurrentAngle)
>
> objGraphics.DrawPie(Pens.Black, 220, 95, 100, 100,
> sglTotalAngle, sglCurrentAngle)
>
>
>
> sglTotalAngle += sglCurrentAngle
>
> Next i
>
>
>
> objBitMap.Save(Response.OutputStream, ImageFormat.Gif)
>
> End Sub
>
> 'This function returns a color for the bar and pie charts.
>
> Private Function GetColor(ByVal itemIndex As Integer) As Color
>
> Dim objColor As Color
>
>
>
> Select Case itemIndex
>
> Case 0
>
> objColor = Color.Blue
>
> Case 1
>
> objColor = Color.Red
>
> Case 2
>
> objColor = Color.Yellow
>
> Case 3
>
> objColor = Color.Purple
>
> Case 4
>
> objColor = Color.Orange
>
> Case 5
>
> objColor = Color.Brown
>
> Case 6
>
> objColor = Color.Gray
>
> Case 7
>
> objColor = Color.Maroon
>
> Case Else
>
> objColor = Color.Green
>
> End Select
>
>
>
> Return objColor
>
>
>
> End Function
>
>
Hi Leon,
Thanks for the reply.
But how should i iterate by using a member of the struct.
Are u saying i shoud use Names and Value and not arrValues and
arrValueNames?
With this line :- foreach(GraphData graphData in GraphDataCollection)
What should input as "graphData" in relative to my code.
Sorry for these questions but i need to change C# to VB.NET.
Thx in Advance..
"Leon Welicki" <Le*********@discussions.microsoft.com> wrote in message
news:53**********************************@microsof t.com... Hi Patrick
I think that there is a problem in the way you iterate through the
GraphDataCollection.
Here is a snippet of a way to walk through it (c#, sorry again ;))
foreach(GraphData graphData in GraphDataCollection)
{
...
...
objGraphics.DrawString(graphData.Name, New
Font("Tahoma", 10), Brushes.Black, descLeg)
...
...
}
Can you see the difference between this and your code? you are iterating
through a collection of GraphData elements, but instead of using a member
of the struct you are doing a ToString of the whole instance of the struct.
Another further improvement would be define the struct GraphData outside
the class, just in case you want to reuse it for another graphic. Maybe you
could isolate the GetGraphData function as a member of a separate class. That
function could receive the Sql query as a parameter. Within this two
simple refactorings you could be able to reuse this functions to draw other
graphics, based on different data
If you have any trouble with this, don´t hesitate to contact me
Regards,
Leon
"Patrick.O.Ige" wrote:
Hi Leon,
I have tried something out with ur ideas but it looks like NO Data
is getting to the charts..
If u can go trhough the code.
Thanks
Code Below:-
-----------------
Public Class Chartdb
Inherits System.Web.UI.Page
Dim graphDataCollection As ArrayList = New ArrayList
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub
InitializeComponent()
End Sub
'NOTE: The following placeholder declaration is required by the Web
Form Designer.
'Do not delete or move it.
Private designerPlaceholderDeclaration As System.Object
Private Sub Page_Init(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Init
'CODEGEN: This method call is required by the Web Form Designer
'Do not modify it using the code editor.
InitializeComponent()
End Sub
#End Region
Public Structure GraphData
Public Name As String
Public Value As Double
Public Sub New(ByVal arrValueNames As String, ByVal arrValues As
Double)
Me.Name = arrValueNames
Me.Value = arrValues
End Sub
End Structure
Public Function GetGraphData() As ArrayList
' Create the SQL Connection and Command Objects
Dim connectionString As String
connectionString = "server=(local);database=Northwind;integrated
security=true;"
Dim connection As SqlConnection = New
SqlConnection(connectionString) Dim command As SqlCommand = New SqlCommand
Dim reader As SqlDataReader = Nothing
' create the graphdata collecion instance
Try
' open the connection
connection.Open()
' establish the sql sentence to the command
command.CommandText = "SELECT arrValues,arrValueNames FROM
Charts"
' bind the command and the connection
command.Connection = connection
' fetch the data in a DataReader
reader =
command.ExecuteReader(CommandBehavior.SequentialAc cess)
' while there is data left to read...
While reader.Read()
'add data to the collection
graphDataCollection.Add(New
GraphData(reader.GetString(0), reader.GetInt32(1)))
End While
Finally
' close and release all data access objects
If Not reader Is Nothing Then
reader.Close()
End If
connection.Close()
command.Dispose()
connection.Dispose()
End Try
' return the graph data
Return graphDataCollection
End Function
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
Dim objBitMap As New Bitmap(400, 200)
Dim objGraphics As Graphics
objGraphics = Graphics.FromImage(objBitMap)
objGraphics.Clear(Color.Azure)
'Write out a title for your bar and pie chart.
objGraphics.DrawString("5 Month Projection Report", New
Font("Tahoma", 16), Brushes.Black, New PointF(5, 5))
'Create a legend to describe your bar and chart.
'symbolLeg represents the(position) stats near the calender
Dim symbolLeg As PointF = New PointF(335, 20)
'desc represents the (position)Months printed
Dim descLeg As PointF = New PointF(360, 16)
Dim colorCode As Integer = 0
Dim arrValueNames As GraphData
'Dim graphDataCollection As ArrayList = New ArrayList
For Each arrValueNames In graphDataCollection
colorCode = colorCode + 1
objGraphics.FillRectangle(New
SolidBrush(GetColor(colorCode)), symbolLeg.X, symbolLeg.Y, 20, 10)
objGraphics.DrawRectangle(Pens.Black, symbolLeg.X,
symbolLeg.Y, 20, 10)
objGraphics.DrawString(arrValueNames.ToString, New
Font("Tahoma", 10), Brushes.Black, descLeg)
symbolLeg.Y += 15
descLeg.Y += 15
Next
'Loop through the values to create the Bar Chart.
'For i = 0 To arrValues.Length - 1
'objGraphics.FillRectangle(New SolidBrush(GetColor(i)), (i * 35)
+ 15, 200 - arrValues(i), 20, arrValues(i) + 5)
'objGraphics.DrawRectangle(Pens.Black, (i * 35) + 15, 200 -
arrValues(i), 20, arrValues(i) + 5)
'Next
objBitMap.Save(Response.OutputStream, ImageFormat.Gif)
End Sub
Private Function GetColor(ByVal itemIndex As Integer) As Color
Dim objColor As Color
Select Case itemIndex
Case 0
objColor = Color.Blue
Case 1
objColor = Color.Red
Case 2
objColor = Color.Yellow
Case 3
objColor = Color.Purple
Case 4
objColor = Color.Orange
Case 5
objColor = Color.Brown
Case 6
objColor = Color.Gray
Case 7
objColor = Color.Maroon
Case Else
objColor = Color.Green
End Select
Return objColor
End Function
End Class
"Leon Welicki" wrote:
Here, you´ve got a function that returns an ArrayList filled with the
Graph Data from a Sql Server DataBase
using System;
using System.Data;
using System.Data.SqlClient;
using System.Collections;
public ArrayList GetGraphData()
{
// Create the SQL Connection and Command Objects
string connectionString =
"Server=yoursever;UID=yourUID;PWD=yourPWD;Database =yourDB";
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand command = new SqlCommand();
SqlDataReader reader = null;
// create the graphdata collecion instance
ArrayList graphDataCollection = new ArrayList();
try
{
// open the connection
connection.Open();
// establish the sql sentence to the command
command.CommandText = "SELECT fieldName, fieldValue FROM myTable";
// bind the command and the connection
command.Connection = connection;
// fetch the data in a DataReader
reader = command.ExecuteReader(CommandBehavior.SequentialAc cess);
// while there is data left to read...
while (reader.Read())
{ // add data to the
collection graphDataCollection.Add(new GraphData(reader.GetString(0),
reader.GetInt32(1)));
}
}
finally
{
// close and release all data access objects
if (reader != null)
reader.Close();
connection.Close();
command.Dispose();
connection.Dispose();
}
// return the graph data
return graphDataCollection;
}
Be carefull with the data that is returned by your query. According to
the piece of code above, it must return a string field and then and
integer field.
You have also to define this struct:
public struct GraphData
{
public string Name;
public double Value;
public GraphData(string name, double val)
{
this.Name = name;
this.Value = val;
}
}
Regards,
Leon
"Patrick.O.Ige" wrote:
> Thx Leon,
> But can you please forward me a detailed code how to retrieve the
values > from database.
> Thanks
>
>
> "Leon Welicki" <Le*********@discussions.microsoft.com> wrote in
message > news:89**********************************@microsof t.com...
> > Hi Patrick,
> >
> > You can get the values to fill the arrValues and arrValueNames
from the > > database, and put them on a collection (instead of using a fixed
array). > > Additionally, you can create a struct (a value type) to hold the
pairs > > [Value, Name], like the one as follows:
> >
> > public struct GraphValue
> > {
> > public Name;
> > public Value;
> > }
> >
> > Then, you can iterate through your collection of data (a
collection filled > > with data of the type [Value, Name] defined above) with a for each
and > make
> > the appropriate drawings en each case
> >
> > As an example, this could be a refactored piece of the code (c#,
sorry > ;)),
> > using the collection of values
> >
> >
> > ArrayList GraphValueCollection = new ArrayList();
> >
> > ...
> > ...
> >
> > int colorCode = 0;
> > foreach(GraphValue graphValue in GraphValueCollection)
> > {
> > colorCode++;
> > objGraphics.FillRectangle(New SolidBrush(GetColor(colorCode)),
> > symbolLeg.X, symbolLeg.Y, 20, 10);
> >
> > objGraphics.DrawRectangle(Pens.Black, symbolLeg.X,
symbolLeg.Y, 20, > 10)
> >
> > objGraphics.DrawString(graphValue.Value, New Font("Tahoma",
10), > > Brushes.Black, descLeg);
> >
> > symbolLeg.Y += 15;
> >
> > descLeg.Y += 15;
> > }
> >
> >
> > Regards,
> > Leon
> >
> >
> > "Patrick.O.Ige" wrote:
> >
> > > I have a code below and its a PIE & BAR CHART.
> > > The values now are all static but I want to be able to pull the
values > from
> > > a database.
> > > Can you guys give me some ideas to do this?
> > > Thanks
> > >
> > >
> > > Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
> > > System.EventArgs) Handles MyBase.Load
> > > 'Declare your object variables
> > >
> > > Dim i As Integer
> > >
> > >
> > >
> > > 'Build a BitMap that will act as the pallet and
container > > >
> > > 'for the bar graph. Here 600 is the width and 300 is the
height. > > >
> > > 'These values could also be passed as parameters.
> > >
> > > Dim objBitMap As New Bitmap(400, 200)
> > >
> > >
> > >
> > > 'Declare your Graphics objects for painting graphics on
you > newly
> > > created bitmap.
> > >
> > > Dim objGraphics As Graphics
> > >
> > > objGraphics = Graphics.FromImage(objBitMap)
> > >
> > > 'Set the background color to silver
> > >
> > > objGraphics.Clear(Color.Silver)
> > >
> > >
> > >
> > > 'Build an array of values for the bar and pie chart.
> > >
> > > 'These values could also be pulled from a database.
> > > ' Retrieve Products Table
> > >
> > >
> > > Dim arrValues(5) As Integer
> > >
> > > arrValues(0) = 100
> > >
> > > arrValues(1) = 135
> > >
> > > arrValues(2) = 115
> > >
> > > arrValues(3) = 125
> > >
> > > arrValues(4) = 75
> > >
> > > arrValues(5) = 300
> > >
> > >
> > > Dim arrValueNames(5) As String
> > >
> > > arrValueNames(0) = "Jan"
> > >
> > > arrValueNames(1) = "Feb"
> > >
> > > arrValueNames(2) = "Mar"
> > >
> > > arrValueNames(3) = "Apr"
> > >
> > > arrValueNames(4) = "May"
> > >
> > > arrValueNames(5) = "June"
> > >
> > >
> > >
> > >
> > > 'Write out a title for your bar and pie chart.
> > > objGraphics.DrawString("5 Month Projection Report", New
> > > Font("Tahoma", 16), Brushes.Black, New PointF(5, 5))
> > >
> > >
> > >
> > > 'Create a legend to describe your bar and chart.
> > >
> > > Dim symbolLeg As PointF = New PointF(335, 20)
> > >
> > > Dim descLeg As PointF = New PointF(360, 16)
> > >
> > >
> > >
> > > For i = 0 To arrValueNames.Length - 1
> > >
> > > objGraphics.FillRectangle(New
SolidBrush(GetColor(i)), > > > symbolLeg.X, symbolLeg.Y, 20, 10)
> > >
> > > objGraphics.DrawRectangle(Pens.Black, symbolLeg.X,
> symbolLeg.Y,
> > > 20, 10)
> > >
> > >
> > >
> > > objGraphics.DrawString(arrValueNames(i).ToString,
New > > > Font("Tahoma", 10), Brushes.Black, descLeg)
> > >
> > > symbolLeg.Y += 15
> > >
> > > descLeg.Y += 15
> > >
> > > Next i
> > >
> > >
> > >
> > > 'Loop through the values to create the Bar Chart.
> > >
> > > For i = 0 To arrValues.Length - 1
> > >
> > > objGraphics.FillRectangle(New
SolidBrush(GetColor(i)), (i * > 35)
> > > + 15, 200 - arrValues(i), 20, arrValues(i) + 5)
> > >
> > > objGraphics.DrawRectangle(Pens.Black, (i * 35) + 15,
200 - > > > arrValues(i), 20, arrValues(i) + 5)
> > >
> > > Next
> > >
> > >
> > >
> > > 'Loop through the values to create the Pie Chart.
> > >
> > > Dim sglCurrentAngle As Single = 0
> > >
> > > Dim sglTotalAngle As Single = 0
> > >
> > > i = 0
> > >
> > >
> > >
> > > For i = 0 To arrValues.Length - 1
> > >
> > > 'Current Value / (sum of all the Values) * 360
degree angle > > >
> > > sglCurrentAngle = arrValues(i) / 550 * 360
> > >
> > >
> > >
> > > objGraphics.FillPie(New SolidBrush(GetColor(i)),
220, 95, > 100,
> > > 100, sglTotalAngle, sglCurrentAngle)
> > >
> > > objGraphics.DrawPie(Pens.Black, 220, 95, 100, 100,
> > > sglTotalAngle, sglCurrentAngle)
> > >
> > >
> > >
> > > sglTotalAngle += sglCurrentAngle
> > >
> > > Next i
> > >
> > >
> > >
> > > objBitMap.Save(Response.OutputStream, ImageFormat.Gif)
> > >
> > > End Sub
> > >
> > > 'This function returns a color for the bar and pie charts.
> > >
> > > Private Function GetColor(ByVal itemIndex As Integer) As
Color > > >
> > > Dim objColor As Color
> > >
> > >
> > >
> > > Select Case itemIndex
> > >
> > > Case 0
> > >
> > > objColor = Color.Blue
> > >
> > > Case 1
> > >
> > > objColor = Color.Red
> > >
> > > Case 2
> > >
> > > objColor = Color.Yellow
> > >
> > > Case 3
> > >
> > > objColor = Color.Purple
> > >
> > > Case 4
> > >
> > > objColor = Color.Orange
> > >
> > > Case 5
> > >
> > > objColor = Color.Brown
> > >
> > > Case 6
> > >
> > > objColor = Color.Gray
> > >
> > > Case 7
> > >
> > > objColor = Color.Maroon
> > >
> > > Case Else
> > >
> > > objColor = Color.Green
> > >
> > > End Select
> > >
> > >
> > >
> > > Return objColor
> > >
> > >
> > >
> > > End Function
> > >
> > >
>
>
>
Here is list of 'PHP graphic software.' ( http://tinyurl.com/e3cgo)
Highly recommend jpgraph and phplot.
all could be integrated with database
Patrick.O.Ige wrote: *I have a code below and its a PIE & BAR CHART.
The values now are all static but I want to be able to pull the
values from
a database.
Can you guys give me some ideas to do this?
Thanks
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
'Declare your object variables
Dim i As Integer
'Build a BitMap that will act as the pallet and container
'for the bar graph. Here 600 is the width and 300 is the height.
'These values could also be passed as parameters.
Dim objBitMap As New Bitmap(400, 200)
'Declare your Graphics objects for painting graphics on you newly
created bitmap.
Dim objGraphics As Graphics
objGraphics = Graphics.FromImage(objBitMap)
'Set the background color to silver
objGraphics.Clear(Color.Silver)
'Build an array of values for the bar and pie chart.
'These values could also be pulled from a database.
' Retrieve Products Table
Dim arrValues(5) As Integer
arrValues(0) = 100
arrValues(1) = 135
arrValues(2) = 115
arrValues(3) = 125
arrValues(4) = 75
arrValues(5) = 300
Dim arrValueNames(5) As String
arrValueNames(0) = "Jan"
arrValueNames(1) = "Feb"
arrValueNames(2) = "Mar"
arrValueNames(3) = "Apr"
arrValueNames(4) = "May"
arrValueNames(5) = "June"
'Write out a title for your bar and pie chart.
objGraphics.DrawString("5 Month Projection Report", New
Font("Tahoma", 16), Brushes.Black, New PointF(5, 5))
'Create a legend to describe your bar and chart.
Dim symbolLeg As PointF = New PointF(335, 20)
Dim descLeg As PointF = New PointF(360, 16)
For i = 0 To arrValueNames.Length - 1
objGraphics.FillRectangle(New SolidBrush(GetColor(i)),
symbolLeg.X, symbolLeg.Y, 20, 10)
objGraphics.DrawRectangle(Pens.Black, symbolLeg.X, symbolLeg.Y,
20, 10)
objGraphics.DrawString(arrValueNames(i).ToString, New
Font("Tahoma", 10), Brushes.Black, descLeg)
symbolLeg.Y += 15
descLeg.Y += 15
Next i
'Loop through the values to create the Bar Chart.
For i = 0 To arrValues.Length - 1
objGraphics.FillRectangle(New SolidBrush(GetColor(i)), (i * 35)
+ 15, 200 - arrValues(i), 20, arrValues(i) + 5)
objGraphics.DrawRectangle(Pens.Black, (i * 35) + 15, 200 -
arrValues(i), 20, arrValues(i) + 5)
Next
'Loop through the values to create the Pie Chart.
Dim sglCurrentAngle As Single = 0
Dim sglTotalAngle As Single = 0
i = 0
For i = 0 To arrValues.Length - 1
'Current Value / (sum of all the Values) * 360 degree angle
sglCurrentAngle = arrValues(i) / 550 * 360
objGraphics.FillPie(New SolidBrush(GetColor(i)), 220, 95, 100,
100, sglTotalAngle, sglCurrentAngle)
objGraphics.DrawPie(Pens.Black, 220, 95, 100, 100,
sglTotalAngle, sglCurrentAngle)
sglTotalAngle += sglCurrentAngle
Next i
objBitMap.Save(Response.OutputStream, ImageFormat.Gif)
End Sub
'This function returns a color for the bar and pie charts.
Private Function GetColor(ByVal itemIndex As Integer) As Color
Dim objColor As Color
Select Case itemIndex
Case 0
objColor = Color.Blue
Case 1
objColor = Color.Red
Case 2
objColor = Color.Yellow
Case 3
objColor = Color.Purple
Case 4
objColor = Color.Orange
Case 5
objColor = Color.Brown
Case 6
objColor = Color.Gray
Case 7
objColor = Color.Maroon
Case Else
objColor = Color.Green
End Select
Return objColor
End Function *
--
fine
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