[RESOLVED] Create Code Behind Files Automatically

**Nibinaear** · January 13th, 2010, 12:49 PM

Hi. I've just started learning .net with VB and C#. I'm trying to use Code Behind files but the problem I'm having is that I can't create them automatically. I'm using Visual Studio 2008 incidentally. If I go to File > New > File.. and then enter test1.aspx.cs it just creates a HTML file with a Page directive at the top.

How do I get it to add the Import statements at the top and set up the Partial class (if that's possible)?

In my book and on the web it would suggest that this just happens.. But no matter what I do it won't do this for some reason.

Edited I used File > New > File.. > Class

instead and this seemed to do the trick. It moaned about it not being in the App_Code folder for some reason. Is this the general way of making the code behind file?

I know that sometimes code behind files are just created for you but that doesn't seem to have happened here.

**Nibinaear** · January 13th, 2010, 02:01 PM

I now have a new problem with code behind files. None of the controls inside my aspx file are recognised inside the code behind file.

Code Behind

Code:

using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class Test1CodeBehind : System.Web.UI.Page
{
	public void Click(object s, EventArgs e)
	{
    messageLabel.Text = "test comment";
	}
}

Aspx file

Code:

<&#37;@ Page Language="C#" CodeFile="test1.aspx.cs" Inherits="Test1CodeBehind" %>

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

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>Untitled Page</title>
</head>
<body>

<form runat="server" id="form1">

  <asp:Label id="messageLabel" runat="server" />
  
  <asp:Button runat="server" OnClick="Click" Text="run code" />
  
</form>

</body>
</html>

My error is:

Code:

Error	2	The name 'messageLabel' does not exist in the current context	C:\asp_sites\test2\App_Code\test1.aspx.cs	17	5	http://localhost:81/

Edited
As it turns out, my code behind file was inside the App_Code folder as suggested by Visual studio, this prevented it from running correctly. I spent hours trying to sort this out.

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