No display when previewed

Hi guys,
I'm an .NET newbie, I need help.
Why is it that when I preview my aspx page it won't show up anything except this line:
<p>The data will be refreshed 10 seconds from now: <%= DateTime.Now %></p>

Here's my code below:

Expand|Select|Wrap|Line Numbers

 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<%@ OutputCache Duration="10" VaryByParam="None" %>

<%@ Import Namespace="System.Data.OleDb" %>

<%@ Import Namespace="System.Data" %>

<html dir="ltr" xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>Page Data Caching</title>

<script type="text/c#" language="C#" runat="server">

DataView objDV;

void Page_Load() {

    if (IsPostBack) {

        dgEmployees.DataSource = GetEmployees();

        dgEmployees.DataBind();

    }

}
 
DataView GetEmployees() {

    DataSet objDS = new DataSet();    

    OleDbConnection objConn = new OleDbConnection(ConfigurationSettings.AppSettings["DNS"]);

    OleDbDataAdapter objDA;
 
    objDV = (DataView)Cache["Employees"];

    if (objDV == null) {

        objDA = new OleDbDataAdapter("SELECT * FROM Employees", objConn);

        objDA.Fill(objDS, "Employees");

        objDV = objDS.Tables["Employees"].DefaultView;

        Cache["Employees"] = objDV;

    }
 
    return objDV;

}

void dgEmployees_Sort(Object s, DataGridSortCommandEventArgs e) {

    objDV = GetEmployees();

    objDV.Sort = e.SortExpression;

    dgEmployees.DataSource = objDV;

    dgEmployees.DataBind();

}

</script>

</head>

<body>

<form runat="server">

<asp:DataGrid ID="dgEmployees" runat="server" AutoGenerateColumns="false" GridLines="None" AllowSorting="true" OnSortCommand="dgEmployees_Sort">

    <ItemStyle Font-Names="Arial" Font-Size="10pt" ForeColor="#000000" />

    <HeaderStyle Font-Names="Arial" Font-Size="10pt" ForeColor="#FFFFFF" Font-Bold="true" BackColor="#003366" />

    <AlternatingItemStyle Font-Names="Arial" Font-Size="10pt" BackColor="#CCCCCC" />

    <Columns>

        <asp:BoundColumn DataField="Name" HeaderText="Name" SortExpression="Name" />

        <asp:BoundColumn DataField="Extension" HeaderText="Extension" SortExpression="Extension" />

    </Columns>

    </asp:DataGrid>

<p>The data will be refreshed 10 seconds from now: <%= DateTime.Now %></p>

</form>

</body>

</html>

thanks. -tj

Jul 22 '08 #1

Subscribe Post Reply

1234

Plater

7,872

Expert 4TB

What version of asp.NET are you using? This looks like you are using VS2003 maybe?

And are you sure that this page is
A)Saved as an aspx page
and
B)Correctly deployed to the IIS server?

Jul 22 '08 #2

tjc0ol

What version of asp.NET are you using? This looks like you are using VS2003 maybe?

And are you sure that this page is
A)Saved as an aspx page
and
B)Correctly deployed to the IIS server?

Honestly I don't know how to check my asp.NET version, all I know is that I'm using Expression web on my aspx pages. My other aspx example pages runs smoothly but this example above doesn't.

Yes it was saved as an aspx page.

I think its in .NET Framework 1.1(version 1.1.4322.573) since I can't find any IIS server here. I can't find it in Administrative tools.

Here's my previous aspx example below that runs correctly:

Expand|Select|Wrap|Line Numbers

 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<%@ OutputCache Duration="10" VaryByParam="None" %>

<%@ Import Namespace="System.Data.OleDb" %>

<%@ Import Namespace="System.Data" %>

<html dir="ltr" xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>Cached DataGrid</title>

<script type="text/c#" language="C#" runat="server">

OleDbConnection objConn = new OleDbConnection(ConfigurationSettings.AppSettings["DNS"]);

OleDbDataAdapter objDA;

DataSet objDS = new DataSet();

void Page_Load() {

    objDA = new OleDbDataAdapter("SELECT * FROM Employees", objConn);

    objDA.Fill(objDS, "Employees");

    dgEmployees.DataSource = objDS;

    dgEmployees.DataBind();

}

</script>

</head>

<body>

<form runat="server">

    <asp:DataGrid ID="dgEmployees" runat="server" />

    <p>The data will be refreshed 10 seconds from now: <%= DateTime.Now %></p>

</form>

</body>

</html>

thanks. -tj

Jul 24 '08 #3

tjc0ol

What version of asp.NET are you using? This looks like you are using VS2003 maybe?

And are you sure that this page is
A)Saved as an aspx page
and
B)Correctly deployed to the IIS server?

Anyways I found it out my asp.NET version:
VersionCheck results for my machine:

Installed .NET Runtime(s)
OK.
Current version: The following runtimes are installed:
1.1.4322.2407 Version 1.1 Post-SP1 with KB928366 Apr 2007
2.0.50727.1433
3.0.4506.30 Version 3.0 RTM (RTM 4506.30) Nov 2006

ADO Database Runtime Version
OK.
Current version: 2.81.1132.0
Determined from file: C:\Program Files\Common Files\System\ado\msado15.dll

Internet Explorer Version
OK.
Current version: 7.0.6000.16674
Determined from file: C:\WINDOWS\system32\ieframe.dll

thanks. -tj

Jul 24 '08 #4

tjc0ol

What version of asp.NET are you using? This looks like you are using VS2003 maybe?

And are you sure that this page is
A)Saved as an aspx page
and
B)Correctly deployed to the IIS server?

Hi Again,
here's my ASP.NET version below:
Version Information: Microsoft .NET Framework Version:2.0.50727.1433; ASP.NET Version:2.0.50727.1433

Jul 24 '08 #5

DrBunchman

979

Expert 512MB

Are you sure that your DataGrid is being populated? If it isn't then the text in the <p> tags is the only other mark up on the page so would be the only thing that you'll see.

If you put a breakpoint on the line

Expand|Select|Wrap|Line Numbers

dgEmployees.DataSource = GetEmployees();

and step through it, are you binding any data to the DataGrid?

Dr B

Jul 24 '08 #6

tjc0ol

Are you sure that your DataGrid is being populated? If it isn't then the text in the <p> tags is the only other mark up on the page so would be the only thing that you'll see.

If you put a breakpoint on the line

Expand|Select|Wrap|Line Numbers

dgEmployees.DataSource = GetEmployees();

and step through it, are you binding any data to the DataGrid?

Dr B

Dr B,
I think yes, as according to my code I placed the

Expand|Select|Wrap|Line Numbers

dgEmployees.DataSource = GetEmployees();

inside the

Expand|Select|Wrap|Line Numbers

if(IsPostBack) {

There is a binding of data to the DataGrid inside the

Expand|Select|Wrap|Line Numbers

 DataView GetEmployees() {

    DataSet objDS = new DataSet();    

    OleDbConnection objConn = new OleDbConnection(ConfigurationSettings.AppSettings["DSN"]);

    OleDbDataAdapter objDA;
 
    objDV = (DataView)Cache["Employees"];

    if (objDV == null) {

        objDA = new OleDbDataAdapter("SELECT * FROM Employees", objConn);

        objDA.Fill(objDS, "Employees");

        objDV = objDS.Tables["Employees"].DefaultView;

    dgEmployees.DataSource = objDS;

    dgEmployees.DataBind();
 
        Cache["Employees"] = objDV;

    }
 
    return objDV;

}

This code came from my asp.net book and I think there's a new version of this code since the version of it is ASP.NET and I'm using .NET 2 now. I hope this will be resolved. thanks. -tj

Jul 26 '08 #7

Plater

7,872

Expert 4TB

Do you have anything outside the:

Expand|Select|Wrap|Line Numbers

 
if(isPostBack)

{

...

}

Block?
Because nothing inside that block will be executed the first time the page loads.
You be wanting

Expand|Select|Wrap|Line Numbers

 
if(!isPostBack)

{

...

}

Jul 28 '08 #8

tjc0ol

Do you have anything outside the:

Expand|Select|Wrap|Line Numbers

if(isPostBack)

{

...

}

Block?
Because nothing inside that block will be executed the first time the page loads.
You be wanting

Expand|Select|Wrap|Line Numbers

if(!isPostBack)

{

...

}

There is a code inside the block

Expand|Select|Wrap|Line Numbers

 void Page_Load() {

    if (IsPostBack) {

        dgEmployees.DataSource = GetEmployees();

        dgEmployees.DataBind();

    }

}

DataView GetEmployees() {

    DataSet objDS = new DataSet();    

    OleDbConnection objConn = new OleDbConnection(ConfigurationSettings.AppSettings["DSN"]);

    OleDbDataAdapter objDA;
 
    objDV = (DataView)Cache["Employees"];

    if (objDV == null) {

        objDA = new OleDbDataAdapter("SELECT * FROM Employees", objConn);

        objDA.Fill(objDS, "Employees");

        objDV = objDS.Tables["Employees"].DefaultView;

    dgEmployees.DataSource = objDS;

    dgEmployees.DataBind();
 
        Cache["Employees"] = objDV;

    }
 
    return objDV;

}

Just as in the first post. Thanks, -tj

Jul 31 '08 #9

Plater

7,872

Expert 4TB

Ah ok, so you are never binding any data, so your page is blank.

Use this:

Expand|Select|Wrap|Line Numbers

 
void Page_Load() {

    if (!IsPostBack) {

        dgEmployees.DataSource = GetEmployees();

        dgEmployees.DataBind();

    }

}

(Note: the ! before IsPostBack)

Jul 31 '08 #10

tjc0ol

Ah ok, so you are never binding any data, so your page is blank.

Use this:

Expand|Select|Wrap|Line Numbers

void Page_Load() {

    if (!IsPostBack) {

        dgEmployees.DataSource = GetEmployees();

        dgEmployees.DataBind();

    }

}

(Note: the ! before IsPostBack)

thanks a lot this one solves the problem.

Aug 6 '08 #11

by: Hemanth | last post by:

Hello there, I've a utility that runs on a linux machine. Basically, it opens a window, draws a figure and captures the image (screen) and stores it as a jpeg file. The utility requires a...

PHP

Problems with form elements that are hidden with <div style="display:none">

by: Dan R Brown | last post by:

I have a large form that is generated dynamically in a jsp using xml / xslt. So, to break up this form into several "tabbed" sections, I break up the form using <div> tags. Each <div...

Javascript

Quene display

by: Kay | last post by:

This function is used to display the context of a queue. I input an integer comparing with the queue cuisine number, if cuisine number is same as the input, it shows the context. However, it cannot...

C / C++

How to display multicolumns and get back multi selections form lis

by: Alpha | last post by:

Hi, I'm working on a Windows applicaton with VS 2003 on windows 2000. I have a listbox that I have binded to a dataset table, "source" which has 3 columns. I would like to display 2 of those...

C# / C Sharp

Can't get information to display in a lable control on one form from another.

by: John Phelan-Cummings | last post by:

When I add the name of a new individual in a, bound form, it will not display that person’s name in a label control of a second unbound form. I have a scheduling program that I am working on. ...

Microsoft Access / VBA

Firefox inserts spaces when changing display

by: rbinington | last post by:

Hi, I am trying to write a DNN module that has the ability to insert articles into an article repository. I want the users to be able to move pages around and enter text into the FCKEditor. I...

Javascript

my hide/display function fails when element begins display:none

by: libsfan01 | last post by:

function switch_display(switchme) { var el = document.getElementById(switchme); el.style.display = (el.style.display == 'none')? '' : 'none'; } im using this function to switch the display on...

Javascript

Problem with Image display on separate window

by: tshad | last post by:

This was posted before but the message got messed up (all NLs were stripped out for some reason). I have 2 labels that hold the name of different images on my .aspx page. <asp:Label ID="Logo"...

ASP.NET

IE6 only display text when you mouse over it (!)

by: Edward | last post by:

IE6 only displays certain text on my site if you mouse over it (!). I reduced the HTML down to this code below which still shows this effect/bug. My temporary solution was to take out all the...

HTML / CSS

Merging data from multiple Excel files

by: ryjfgjl | last post by:

In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...

Data Management

Navigating the Data Structures and Algorithms (DSA)

by: BarryA | last post by:

What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...

Algorithms / Advanced Math

Looking to do Android software development, any suggestions? Is flutter better?

by: nemocccc | last post by:

hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?

General

Is that possible of reading the .csv file in column wise and the column have different lengths ?

by: Sonnysonu | last post by:

This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...

C / C++

What is ONU?

by: marktang | last post by:

ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...

General

Problem With Comparison Operator <=> in G++

by: Oralloy | last post by:

Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers,...

C / C++

The easy way to turn off automatic updates for Windows 10/11

by: Hystou | last post by:

Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows...

Windows Server

Discussion: How does Zigbee compare with other wireless protocols in smart home applications?

by: tracyyun | last post by:

Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each...

General

AI Job Threat for Devs

by: agi2029 | last post by:

Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing,...

Career Advice

Similar topics