File: ContentRotator.cs
using System;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace myControls
{
[ParseChildren(false)]
public class ContentRotator : WebControl
{
protected override void AddParsedSubObject(object obj)
{
if (obj is Content)
base.AddParsedSubObject(obj);
}
protected override void RenderContents(HtmlTextWriter writer)
{
Random rnd = new Random();
int index = rnd.Next(this.Controls.Count);
this.Controls[index].RenderControl(writer);
}
}
public class Content : Control
{
}
}
File: Default.aspx
<%@ Page Language="C#" %>
<%@ Register TagPrefix="custom" Namespace="myControls" %>
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
Show ContentRotator