DropDownlistControl.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="1DropDownlistControl.aspx.cs" Inherits="DropDownlistControl" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
DesignTimeDropDownList:<asp:DropDownList ID="DropDownList1" runat="server" Height="16px" Width="179px">
<asp:ListItem Value="1">Hyderabad</asp:ListItem>
<asp:ListItem Value="2">Karachi</asp:ListItem>
<asp:ListItem Value="3" Enabled="false">Lahor</asp:ListItem>
<asp:ListItem Value="4" Selected="True">Isalamabad</asp:ListItem>
</asp:DropDownList>
<br />
<br />
RunTimeDropDownList:<asp:DropDownList ID="DropDownList2" runat="server" Height="29px" Width="200px">
</asp:DropDownList>
<br />
<br />
<asp:Button ID="Button1" runat="server" Text="Submit" OnClick="Button1_Click" />
</div>
</form>
</body>
//Enable Proerty is use to hide and unhide dropdown list
<p>
</p>
</html>
DropDownlistControl.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 DropDownlistControl : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
ListItem L1 = new ListItem("Hyderabad", "1");
ListItem L2 = new ListItem("Karachi", "2");
ListItem L3 = new ListItem("Lahore", "3");
ListItem L4 = new ListItem("Islamabad", "4", false);
//false is use to enable and disable dropdown list
DropDownList2.Items.Add(L1);
DropDownList2.Items.Add(L2);
DropDownList2.Items.Add(L3);
DropDownList2.Items.Add(L4);
//It is use to View Selected Item using Index No
DropDownList2.Items[1].Selected = true;
}
}
protected void Button1_Click(object sender, EventArgs e)
{
}
}
//Hyderabad is text and 1 is Value
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