Table not showing



Hi all,

I'm trying to write a simple page where a table's properties and contained
controls are generated dynamically.

I have the following code:

In Test.aspx:

<%@ Page language="c#" Codebehind="Test.aspx.cs" AutoEventWireup="false"
Inherits="Test.TestForm" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content=""
<body MS_POSITIONING="GridLayout">
<form id="TestForm" method="post" runat="server">
<table id="TestTable" runat="server">

In test.aspx.cs:

public class TestForm : System.Web.UI.Page
private void Page_Load(object sender, System.EventArgs e)
// Put user code to initialize the page here
TestTable = new HtmlTable();
TestTable.Width = "100%";
HtmlTableRow rw = new HtmlTableRow();
HtmlTableCell cl = new HtmlTableCell();
cl.InnerText = "Test";

#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
// CODEGEN: This call is required by the ASP.NET Web Form Designer.

/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
this.Load += new System.EventHandler(this.Page_Load);

protected System.Web.UI.HtmlControls.HtmlTable TestTable;

Like I said, very simple.

However, when I run the code, nothing shows up - I would expect to see a
single cell with 'Test' displayed in it.

Can anyone explain what's going on here?


Mark Fitzpatrick

You're creating a new HTML Table, that could be causing the problem. The
Table already exists that's part of the form so just create a local
protected variable for the page class like so:

protected HtmlTable TestTable;

If this is being generated by VS.Net, it should already be creating a
protected variable for you. Then all you do is add the row to the table just
like you already do and it should be good. When you set the TestTable = new
HtmlTable() in code behind you're now pointing TestTable to a different
object, meaning it isn't referencing the one in the form anymore.

Hope this helps,
Mark Fitzpatrick
Microsoft MVP - FrontPage

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