Custom Controls ASP.Net Tutorial

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File: Control.ascx
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="Control.ascx.cs" Inherits="Control" %>

    Products:
    Books
  
    Toys
  
    Sports
  
    Furniture
  

File: Control.ascx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class LinkMenu : System.Web.UI.UserControl
{
    public event LinkClickedEventHandler LinkClicked;
    protected void lnk_Command(object sender, CommandEventArgs e)
    {
        if (LinkClicked != null)
        {
            LinkClickedEventArgs args = new LinkClickedEventArgs((string)e.CommandArgument);
            LinkClicked(this, args);
            if (!args.Cancel)
            {
                Response.Redirect(args.Url);
            }
        }
    }
}
File: MenuHost.aspx
<%@ Page Language="C#" AutoEventWireup="true"
    CodeFile="MenuHost.aspx.cs" Inherits="MenuHost"%>
<%@ Register TagPrefix="rntsoft" TagName="LinkMenu" Src="Control.ascx" %>



    Menu Host


    
    

        
            
                
                    
                
                
            
        

                      
                      
                

        
         
    

    


File: MenuHost.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public class LinkClickedEventArgs : EventArgs
{
    private string url;
    public string Url
    {
        get { return url; }
        set { url = value; }
    }
    private bool cancel = false;
    public bool Cancel
    {
        get { return cancel; }
        set { cancel = value; }
    }
    public LinkClickedEventArgs(string url)
    {
        Url = url;
    }
}
public delegate void LinkClickedEventHandler(object sender,  LinkClickedEventArgs e);
public partial class MenuHost : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            if (Request.Params["product"] != null)
            {
                lblSelection.Text = "You chose: ";
                lblSelection.Text += Request.Params["product"];
            }
        }
    }
    protected void LinkClicked(object sender, LinkClickedEventArgs e)
    {
        if (e.Url == "MenuHost.aspx?product=Furniture")
        {
            lblClick.Text = "This link is not allowed.";
            e.Cancel = true;
        }
    }
}