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If you use this control in a page that has been output cached, the NewsRotator control continues to display news items randomly.
using System;
using System.Data;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections.Generic;
namespace myControls
{
public class NewsRotator : WebControl
{
public static string GetNews(HttpContext context)
{
List<String> news = new List<string>();
news.Add("Martians attack!");
news.Add("Moon collides with earth!");
news.Add("Life on Jupiter!");
Random rnd = new Random();
return news[rnd.Next(news.Count)];
}
protected override void RenderContents(HtmlTextWriter writer)
{
Context.Response.WriteSubstitution(GetNews);
}
}
}
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