How to render a Web User Control into a PlaceHolder

Question

Can someone help me to create my custom web user control to be render into a placeholder dynamically?

I just created a web user control which does not have code in the server side just design in the aspx because all the functionallity is client-side.

Web Control

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="WebControlDemo.ascx.cs" Inherits="Project1.Web.UI.WebControlDemo" %>
<div>
Blah blah blah blah
</div>

In another page

protected void button1_Click(object sender, EventArgs e)
{
   WebControlDemo wcd = new WebControlDemo();
   this.placeHolder1.Controls.Add(wcd);
}

But I can't see anything. So what so I need to add that can finally becomes rendered?

Answer 1

You shouldn't create User controls manually in code. You should use LoadControl method from Page object. Then it will initialize it correctly. Like this

protected void button1_Click(object sender, EventArgs e)
{
   WebControlDemo wcd = this.LoadControl("~/SomePath/WebControlDemo.ascx") as WebControlDemo;
   this.placeHolder1.Controls.Add(wcd);
}