Custom Controls ASP.Net Tutorial

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  4. Adding a templated control to a Web page (C#)
<%@ Page Language="C#" %>
<%@ Register Assembly="WebControlLibrary1" Namespace="WebControlLibrary1" 
    TagPrefix="cc1" %>

    protected void Page_Load(object sender, EventArgs e)
    {
        this.TemplatedControl1.DataBind();
    }



    Templated Web Controls


    
    

                    ID=" TemplatedControl1" runat="server">
            The user '<%# Container.Name %>' 
                has a message for you: "<%#Container.Text%>"
            
                
    

    


File: TemplatedControl.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Text;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebControlLibrary1
{
    [DefaultProperty("Text")]
    [ToolboxData("<{0}:TemplatedControl runat=server>")]
    public class TemplatedControl : WebControl
    {
        private string _name;
        private string _text;
        private Message _message;
        private ITemplate _messageTemplate;
        [Browsable(false)]
        public Message Message
        {
            get
            {
                EnsureChildControls();
                return _message;
            }
        }
        [PersistenceMode(PersistenceMode.InnerProperty)]
        [TemplateContainer(typeof(Message))]
        public virtual ITemplate MessageTemplate
        {
            get { return _messageTemplate; }
            set { _messageTemplate = value; }
        }
        [Bindable(true)]
        [DefaultValue("")]
        public string Name
        {
            get { return _name; }
            set { _name = value; }
        }
        [Bindable(true)]
        [DefaultValue("")]
        public string Text
        {
            get { return _text; }
            set { _text = value; }
        }
        public override void DataBind()
        {
            CreateChildControls();
            ChildControlsCreated = true;
            base.DataBind();
        }
        protected override void CreateChildControls()
        {
            this.Controls.Clear();
            _message = new Message(Name, Text);
            ITemplate template = MessageTemplate;
            template.InstantiateIn(_message);
            Controls.Add(_message);
        }
    }
}