example of ajax control "DropDown" using asp.net

DropDown.aspx





<%@ Page Language="C#" AutoEventWireup="true" CodeFile="DropDown.aspx.cs" Inherits="DropDown" %>

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
            <asp:ToolkitScriptManager ID="ScriptManager1" runat="server"></asp:ToolkitScriptManager>
           
     
        <asp:Panel ID="panelItems" runat="server" BorderColor="Aqua" BorderWidth="1">
           
                <%--<asp:BulletedList ID="BulletedList1" runat="server" >
                        <asp:ListItem Text="Item 1"></asp:ListItem>
                        <asp:ListItem Text="Item 2"></asp:ListItem>
                        <asp:ListItem Text="Item 3"></asp:ListItem>         
                </asp:BulletedList>--%>
            <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label><br />
            <asp:Label ID="Label2" runat="server" Text="Label"></asp:Label>
           
            </asp:Panel>
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
          <asp:DropDownExtender ID="DropDownExtender1" runat="server" DynamicServicePath="" Enabled="true" DropDownControlID="panelItems"
          TargetControlID="TextBox1">
       
        </asp:DropDownExtender>
    </div>
    </form>
</body>
</html>















DropDown.aspx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

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

    }
}

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