Question

I am using an ASP.Net Web Application project. I have a user control which has an asp.net button in it. When i use that user control on the page, the button does not appear, but if i put the button directly on the page, the buttons shows up. Any idea what the problem is?

Also, inside that user control, i can override the render method and the test passed to the render method works, but I still do not get a button

The assembly is registered in the web.config

EDIT:After dave’s post, i found that anything put in the .ascx file does not work, while overriding that user control’s render method works

The Page

<%@ Page Title='Home' Language='C#' MasterPageFile='~/Master.Master' AutoEventWireup='true' CodeBehind='Default.aspx.cs' Inherits='Site.Default' %> <asp:Content ID='Content1' ContentPlaceHolderID='head' runat='server'> </asp:Content> <asp:Content ID='Content2' ContentPlaceHolderID='ContentPlaceHolder1' runat='server'>     <div>         <uc:SomeCustomControl ID='myControl' runat='server' />         <asp:Button runat='server' Text='outControl' />     </div> </asp:Content> 

the control .ascx file

<%@ Control Language='C#' AutoEventWireup='true' CodeBehind='TestControl.ascx.cs' Inherits='Site.Controls.TestControl' %>     <asp:Button runat='server' Text='InControl' /><!--cant see this button-->     <p>I can't see this</p><!--cant see this text--> 

the code behind for the .ascx file

using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls;  namespace Site.Controls {     public partial class TestControl : System.Web.UI.UserControl     {         protected void Page_Load(object sender, EventArgs e)         {          }         protected override void Render(HtmlTextWriter writer)         {             writer.Write('I can see this');             base.Render(writer);         }      } }     

And the page source

        I can see this         <input type='submit' name='ctl00$ContentPlaceHolder1$Button1' value='outControl' id='ctl00_ContentPlaceHolder1_Button1' /> 

Answer 1

If you register the control in the top of the page like this

<%@ Register TagPrefix='uc' TagName='SomeCustomControl' Src='~/PathTo/TestControl.ascx' %> 

(the key point here is the Src=’…’ part )

then the markup and controls in the TestControl.ascx will be visible and usable. if you only specify the namespace of the control for instance in web.config <pages> directive (or in the top of the page) then ONLY the codebehind is used, and any markup in the codefront (.ascx) is ignored