Custom Controls ASP.Net Tutorial


            File: ItemRotator.cs
using System;
using System.Collections;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;
namespace myControls
{
    [ParseChildren(true, "Items")]
    public class ItemRotator : CompositeControl
    {
        private ArrayList _items = new ArrayList();
        [Browsable(false)]
        public ArrayList Items
        {
            get { return _items; }
        }
        protected override void CreateChildControls()
        {
            Random rnd = new Random();
            int index = rnd.Next(_items.Count);
            Control item = (Control)_items[index];
            this.Controls.Add(item);
        }
    }
    public class Item : Control
    {
    }
}
File: Default.aspx
<%@ Page Language="C#" Trace="true" %>
<%@ Register TagPrefix="custom" Namespace="myControls" %>
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">


    Show ItemRotator


    
    
            id="ItemRotator1"
        Runat="server">
        
            First Item
        
        
            Second Item
                            id="Calendar1"
                Runat="server" />
        
        
            Third Item