Bytes - answers

mdi

siddhanta — Fri, 20 Nov 2009 19:51:22 GMT

i wanna create a mdi form. but to make the other form as child of the main i cant find any mdiparent property in the properties list. i m using vs 2010.
help plzzz

leave it
i understood how to do it

dll not found when changing the path

tincho87 — Fri, 20 Nov 2009 15:07:42 GMT

Hi everyone, sorry about my english. Im having a problem and i don't know how to fix it.

I have a plugin-based application that i'm developing. Every plugin has a reference to a dll that has different static classes with functions. When i run the application with all the dlls (plugins and their references) in the same directory, the application works fine. But the problem comes when i change the application's path, leaving the dlls in other path. When i run the application, the plugin dll thrown an exception saying that the "functions dll" could not be found, but the dll is in the same directory as the plugin :| .

If i don't explain well:
C:\app.exe
C:\plugin.dll
C:\functions.dll
It works fine.

C:\test\app.exe
C:\plugin.dll
C:\functions.dll
It doesn't work.

I don't know where is the problem.
I'll be really grateful for your help.

Thanks
Greetings

Populating comboBox

buterfly0707 — Fri, 20 Nov 2009 10:04:22 GMT

hi..

i want to fill my combobox from the values which im having in my table in the database. and my combobox name is combobox1 and my table is tblDetails, and this table having two columns code and name. i want code values to the cobobox.

here is my code which i tried to do

this.comboBox1.DataSource = ds.Tables["tbldetail"];
this.comboBox1.DisplayMember = "Code";//column display name
this.comboBox1.ValueMember = "code";//actual column name

ds the dataset.

this is not working. can some one tell me what was the wrong that im doing here.

heap memory allocation

larrye1428 — Thu, 19 Nov 2009 19:30:24 GMT

(I started researching and using C# 2 days ago, so sorry if some of this is basic)

After much reading and other research I have the following concerns:

1) I need a large number of 64K buffers (as many as I can get) and they will last the life of the app.

2) These will be read/written to/from via win API's

3) They need to accessed via pointers (kept in a circular list)

4) I understand I can allocate them on the heap by using the "fixed" keyword and they will not be moved..

5) I also understand I can get and use pointers to them if I use "unsafe" code blocks. Outside of the need for careful code, is there any other problems that "unsafe" causes?

6) I also understand that these fixed buffers will not be managed by the garbage cleanup (the pointer will remain valid).

7) Is there any problems using a large amount of fixed heap? (I expect this will limit the amount of cleanup that can be done) How much heap does .net need to function etc?

8) using pinvoke, can i use these pointers the same way as I would of in c/c++ and avoid marshalling?

9) the win API functions use PVOID to both read and write data.

10) It seems that marshalling is often about allowing the operation and then copying the data to managed code.

11) I need to avoid any memory copying both to avoid time loss and duplicate memory.

12) the app will be moving many 100's of megabytes per second, so want to avoid hidden overheads.

Any help/comments you can provide on this would help. (The books I have don't seem to think I need to know this detail!)

Thanks,

Larry

Edit Button in Dynamically created DataList

Arielle — Thu, 19 Nov 2009 14:28:28 GMT

Background: I have a generated datalist to display information and I need to add the capability to have a button (Edit button) so that users can change the information. I'm sure once I figure it out I'll smack myself on the head for being so stupid but I feel as though right now I'm chasing my tail and want to see if some of yall can point me in a better direction.

Initiation

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 public class GroupDetail : WebPart

  {

//...

    DataList dlViewGroup;

protected override void CreateChildControls()

{

base.CreateChildControls();

      dlViewGroup = new DataList();

      oWeb = getWebFromURL(strOrgSite);

      oOrgChart = getListByName(strOrgList, oWeb);

      if (strGroupCode != string.Empty)

      {

        getGroupInformation(oOrgChart, strGroupCode);

      }

      else if (strDefaultGroupCode != string.Empty)

      {

        getGroupInformation(oOrgChart, strDefaultGroupCode);

      }

      dlViewGroup.HeaderTemplate = new GroupDetailTemplate(ListItemType.Header);

      dlViewGroup.ItemTemplate = new GroupDetailTemplate(ListItemType.Item);

      dlViewGroup.FooterTemplate = new GroupDetailTemplate(ListItemType.Footer);

      dlViewGroup.EditItemTemplate = new GroupDetailTemplate(ListItemType.EditItem);

      dlViewGroup.EditCommand += new DataListCommandEventHandler(dlViewGroup_Edit);

      this.Controls.Add(dlViewGroup);

}

    //User Control Methods

    protected void dlViewGroup_Edit(object sender, DataListCommandEventArgs e)

    {

      dlViewGroup.EditItemIndex = e.Item.ItemIndex;

      BindGroupData();

    }

}

Then here is the templat for the GroupDetail DataList

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   public void InstantiateIn(System.Web.UI.Control container)

    {

      //Declare Template Items

      PlaceHolder ph = new PlaceHolder();

      Label lblDirective = new Label();

      Label lblSymbol = new Label();

      Label lblFax = new Label();

      Label lblEmail = new Label();

      Label lblDirectory = new Label();

      HyperLink lnkArea = new HyperLink();

      lblDirective.ID = "lblDirective";

      lblSymbol.ID = "lblSymbol";

      lblFax.ID = "lblFax";

      lblEmail.ID = "lblEmail";

      lblDirectory.ID = "lblDirectory";

      lnkArea.ID = "lnkArea";

      lnkArea.Target = "_blank";
 
      //Declare Template Controls

      Button btnEditDept = new Button();

      btnEditDept.ID = "btnEditDept";

      btnEditDept.CommandName = "edit";

      btnEditDept.Text = "Edit Department";     
 
      switch (templateType)

      {

        case ListItemType.Header:

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(btnEditDept);

          ph.Controls.Add(new LiteralControl(""));

          break;

        case ListItemType.Item:

           //Department

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(new LiteralControl("Department:"));

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(lblDirective);

          ph.Controls.Add(new LiteralControl(""));
 
          //Office Symbol

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(new LiteralControl("Office Symbol:"));

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(lblSymbol);

          ph.Controls.Add(new LiteralControl(""));
 
          //Office Fax

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(new LiteralControl("Office Fax:"));

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(lblFax);

          ph.Controls.Add(new LiteralControl(""));
 
          //Office Email

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(new LiteralControl("Office Email:"));

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(lblEmail);

          ph.Controls.Add(new LiteralControl(""));
 
          //Staff Directory

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(new LiteralControl("Staff Directory:"));

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(lblDirectory);

          ph.Controls.Add(new LiteralControl(""));
 
          //Office Website

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(new LiteralControl("Website:"));

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(lnkArea);

          ph.Controls.Add(new LiteralControl("")); 
 
          ph.DataBinding += new EventHandler(Item_DataBinding);

          break;

        case ListItemType.Footer:

          ph.Controls.Add(new LiteralControl(""));

          break;

        case ListItemType.EditItem:

          //Department

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(new LiteralControl("Department:"));

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(lblDirective);

          ph.Controls.Add(new LiteralControl(""));
 
          //Office Symbol

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(new LiteralControl("Office Symbol:"));

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(lblSymbol);

          ph.Controls.Add(new LiteralControl(""));
 
          //Office Fax

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(new LiteralControl("Office Fax:"));

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(lblFax);

          ph.Controls.Add(new LiteralControl(""));
 
          //Office Email

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(new LiteralControl("Office Email:"));

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(lblEmail);

          ph.Controls.Add(new LiteralControl(""));
 
          //Staff Directory

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(new LiteralControl("Staff Directory:"));

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(lblDirectory);

          ph.Controls.Add(new LiteralControl(""));
 
          //Office Website

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(new LiteralControl("Website:"));

          ph.Controls.Add(new LiteralControl(""));

          ph.Controls.Add(lnkArea);

          ph.Controls.Add(new LiteralControl(""));
 
          ph.DataBinding += new EventHandler(Item_DataBinding);

          break;

      }

      container.Controls.Add(ph);

    }

    static void Item_DataBinding(object sender, System.EventArgs e)

    {

      PlaceHolder ph = (PlaceHolder)sender;

      DataListItem dli = (DataListItem)ph.NamingContainer;

      ((Label)ph.FindControl("lblDirective")).Text = getStringFromValue(DataBinder.Eval(dli.DataItem, "Title"));

      ((Label)ph.FindControl("lblSymbol")).Text = getStringFromValue(DataBinder.Eval(dli.DataItem, "Symbol"));

      ((Label)ph.FindControl("lblFax")).Text = getStringFromValue(DataBinder.Eval(dli.DataItem, "Office_x0020_Fax"));

      ((Label)ph.FindControl("lblEmail")).Text = getStringFromValue(DataBinder.Eval(dli.DataItem, "Office_x0020_Email"));

      ((Label)ph.FindControl("lblDirectory")).Text = getTextFromNumber(Int32.Parse(getStringFromValue(DataBinder.Eval(dli.DataItem, "Staff_x0020_Directory"))));

      ((HyperLink)ph.FindControl("lnkArea")).NavigateUrl = getFormatURL(getStringFromValue(DataBinder.Eval(dli.DataItem, "Area")), 0);

      ((HyperLink)ph.FindControl("lnkArea")).Text = getFormatURL(getStringFromValue(DataBinder.Eval(dli.DataItem, "Area")), 1);

    }

Date Diff in C# and Asp.net

sajitk — Thu, 19 Nov 2009 10:23:38 GMT

Dear All

I have two dates ile Start Date and End Date.

I want to get the difference of the 2 dates in months.....How do we do it...

For eg.

Start Date = 01/11/2009
End Date: 01/01/2010;

The answer i want is 2 months

Help requested.

Thanks in advance

Sajit

tabfolder

buterfly0707 — Thu, 19 Nov 2009 07:05:44 GMT

What is tabfolder in c#?? i have to create 2 tabfolders in my project but i know what was it..

Problem with unencoded pound signs and WebRequest

RobR2009 — Wed, 18 Nov 2009 21:46:54 GMT

I am having trouble with a C# proxy page I am writing which allows me to do cross domain AJAX calls with Javascript.
The problem is with certain pages that contain pound signs � that are not HTML encoded in the source that I am trying
to extract with the WebRequest and WebResponse objects.
The page is using a charset of iso-8859-1 which I think is the problem as my object is using UTF-8. I have created
two test pages one using UTF-8 the other iso-8859-1

http://www.strictly-software.com/test_pound_iso.htm
http://www.strictly-software.com/test_pound_utf8.htm

I can extract the unencoded pound signs successfully from the UTF-8 page but not the ISO page. Obviously I have no control
over the source content that I want to extract so is there a way of getting the pound signs back instead of ? or squares?

I have tried numerous methods e.g byte arrays, memory streams, changing the encoding object to ASCII, supplying content-types
and charsets etc but nothing seems to work.

The code is below

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.IO;

namespace HattrickHeaven
{
public class HTTPRequest
{

private int _status = 0;
private string _statusDesc = "";
private string _responseContent = "";
private string _errorType = "";
private bool _retry = false;

// only here for testing
private bool _debug = true;
private string _debugFile = @"d:\inetpub\wwwroot\hattrickheaven.com\LogFiles\r ipperDebug.txt";

private void ShowDebug(string msg)
{
if(!_debug) return;

if(!String.IsNullOrEmpty(msg))
{
msg += " ";
System.IO.File.AppendAllText(_debugFile,msg,Encodi ng.UTF8);
// System.IO.File.AppendAllText(_debugFile, msg, Encoding.ASCII);
}
}

public HTTPRequest(string URL, WebProxy proxy, string robotAgent)
{

HttpWebRequest client = (HttpWebRequest)WebRequest.Create(URL);
client.Method = "GET";
client.ContentLength = 0;
client.ContentType = "application/x-www-form-urlencoded;charset=charset=UTF-8";

if (proxy != null)
{
client.Proxy = proxy;
}

client.Timeout = 40000;
client.UserAgent = robotAgent;

try
{
// get the response
HttpWebResponse response = (HttpWebResponse)client.GetResponse();

_statusDesc = response.StatusDescription;
_status = Convert.ToInt32(response.StatusCode);

StreamReader ResponseStream = new StreamReader(response.GetResponseStream(), Encoding.UTF8);

_responseContent = ResponseStream.ReadToEnd();

ResponseStream.Close();
response.Close();

}
catch (Exception err)
{
_errorType = err.Message.ToString();

}

}

public int StatusCode
{
get { return _status; }
}
public string StatusDesc
{
get { return _statusDesc; }
}
public string Response
{
get { return _responseContent; }
}
public string ErrorType
{
get { return _errorType; }
}
public bool Retry
{
get { return _retry; }
}
}
}

Thanks for any help

Gridview image resolution

JustRun — Wed, 18 Nov 2009 13:47:18 GMT

Hi all,

I have a file button that enable user to choose the image, then save it to the datagridview,

The problem is the resolution of the image After saving go down but before saving it good,

why does it do this? how can I keep the original resolution?
Regarding that I deal with the original size of the image.

Thanks

NOT creating new .txt file

Toboe — Wed, 18 Nov 2009 13:17:26 GMT

I have a slight problem. The idea with this part is that the program open a .txt file witch name you type in. It works. The problem is, if you type in a name of file that does not exist, it still opens notepad and ask if I want to create a new document with the name you gave. If the file does not exist, a message box or something similar should show up. Please advice. Thanks :)

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	private void button3_Click(object sender, EventArgs e)

        {

            if (TextBox1.Text != "")

            {

                try

                {

                    System.Diagnostics.Process.Start("notepad.exe", TextBox1.Text);

                }

                catch (Exception excep)

                {

                    MessageBox.Show(excep.ToString());

                }

             }

Can't get more than 10000 controls in a panel

ThatThatGuy — Wed, 18 Nov 2009 13:16:53 GMT

This is an unsual and weird problem that im facing....

Im developing a ticketing software where ....

At runtime when i try to add more than 10000 labels in the panel for seat layouts...

the program raises a Win32 unhandled exception...

Can anyone plz help me on this issue....

Project in ASP.Net and C#

sajitk — Wed, 18 Nov 2009 10:43:38 GMT

Dear Friends,

I have to retrieve a value from the database into a webform.

For eg. in the table Salary, I have a field called Tot_Salary. If the value in this field is 20000.

When i retireve this into a form, i want it to be displayed as 20,000.00.

If again the Tot_Salary has some value like 28524.15

then this will be displayed as 28,524.15

Can this be done....???

Thanks in advance

Sajit

C# Custom Event Handler replicating textBox1_TextChanged event handler

qwedster — Tue, 17 Nov 2009 19:37:38 GMT

Howdy!

I want to write a Custom Event Handler replicating textBox1_TextChanged event handler to update textBox2 with textBox1 text as I type. I tried the following in vain. Please help.

The code snippet:

// CustomEventArgs.cs

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using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;
 
namespace WindowsFormsApplication1

{

    delegate void CustomEventHandler(object sender, CustomEventArgs e);
 
    public class CustomEventArgs : EventArgs

    {

        string TextBoxText;
 
        public CustomEventArgs(string TextBoxText)

        {

            this.TextBoxText = TextBoxText;

        }
 
        internal string TextBoxTextChanged

        {

            get

            {

                return TextBoxText;

            }

        }

    }

}

// Form1.cs

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using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;
 
namespace WindowsFormsApplication1

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();          

        }
 
        private event CustomEventHandler TextBox1Event;
 
        private void TextBox1_CustomTextChanged(object sender, CustomEventArgs e)

        {

            textBox2.Text = e.TextBoxTextChanged;

        }
 
        private void OnTextBox1Event(CustomEventArgs e)

        {

            if (TextBox1Event != null)

            {

                TextBox1Event(this, e);

            }

        }
 
        private void Form1_Load(object sender, EventArgs e)

        {

            TextBox1Event += new CustomEventHandler(TextBox1_CustomTextChanged);

            CustomEventArgs TextBox1EventArgs = new CustomEventArgs(textBox1.Text);

            OnTextBox1Event(TextBox1EventArgs);

        }

   }

}

Thanks.

Cross-thread operation not valid - used timer to do someting, but can't hide the form

x9990860 — Tue, 17 Nov 2009 19:09:51 GMT

Cross-thread operation not valid: Control 'Form1' accessed from a thread other than the thread it was created on.

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using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Timers; 
 
namespace WindowsFormsApplication2

{

    public partial class Form1 : Form

    {

        private static System.Timers.Timer aTimer;
 
        public Form1()

        {

            InitializeComponent();

            aTimer = new System.Timers.Timer();

            aTimer.Elapsed += new ElapsedEventHandler(found_card);

            // Set the Interval to 2 seconds.

            aTimer.Interval = 1000;                     

            aTimer.Enabled = true;          
 
        }
 
        private void found_card(object sender, EventArgs e)

        {

            aTimer.Enabled = false;
 
            // use smart card system to find the card. if found the card, it will open form2 and close form1            
 
            Form form2 = new Form2();

            this.Hide();  // <--- error, please help me to make a solution

            form2.ShowDialog();

            this.Close();                

        }

    }

}

Sorting in C#

bravo659 — Tue, 17 Nov 2009 17:48:41 GMT

How do you sort in C# programmatically.
Meaning not to use the properties window to set sort to true.
Meaning not to use Array.Sort feature either.
This is actually a sort array coded programmatically at runtime.

Thanks i appreciate for your help.