ASP.NET: How to Resolve Client ID

/// <summary>
/// FileName: mycontrol.ascx.cs
/// 
/// Purpose: controls container
/// 
/// Author: 0garcia (og-bit.com) 
/// 
/// Update/Fix History:
/// 0g01302007 Initial Implementation
/// </summary>

namespace ResolveClientId
{
	using System;
	using System.Data;
	using System.Drawing;
	using System.Web;
	using System.Web.UI.WebControls;
	using System.Web.UI.HtmlControls;

	/// <summary>
	///		Summary description for ValidateControl.
	/// </summary>
	public class myControl : System.Web.UI.UserControl
	{
		protected System.Web.UI.WebControls.TextBox mytext;
		protected System.Web.UI.WebControls.Literal   ctrlPrefix;

		private void Page_Load(object sender, System.EventArgs e)
		{			
			string name = this.ClientID;
			string []elm =ctrlPrefix.ClientID.Split('_');		//get an array of values 
			ctrlPrefix.Text = ctrlPrefix.ClientID.Replace(elm[elm.Length - 1],"");    //get the last element and replace from the id     
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		///		Required method for Designer support - do not modify
		///		the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion
	}
}