User Interface<.aspx>

CodeFile

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class LBox1 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        String str = "";
        if (ListBox1.Items[0].Selected == true)
            str = str + ListBox1.Items[0];
        if (ListBox1.Items[1].Selected == true)
            str = str + ListBox1.Items[1];
        if (ListBox1.Items[2].Selected == true)
            str = str + ListBox1.Items[3];
        if (ListBox1.Items[3].Selected == true)
            str = str + ListBox1.Items[3];
        Response.Write("You Have Selected" + " " + str);
    }
}