// Default.aspx //
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Default" %>
<!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 id="Head1" runat="server">
<title>How to use DropDownList AutoPostBack feature</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h2 style="color:Navy">DropDownList: AutoPostBack</h2>
<asp:Label
ID="Label1"
runat="server"
Font-Bold="true"
ForeColor="Purple"
Font-Size="Large"
>
</asp:Label>
<br /><br />
<asp:Label
ID="Label2"
runat="server"
Font-Bold="true"
ForeColor="OrangeRed"
Text="asp.net controls"
>
</asp:Label>
<asp:DropDownList
ID="DropDownList1"
runat="server"
AutoPostBack="true"
OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged"
>
<asp:ListItem>HyperLink</asp:ListItem>
<asp:ListItem>PasswordRecovery</asp:ListItem>
<asp:ListItem>PlaceHolder</asp:ListItem>
<asp:ListItem>LoginName</asp:ListItem>
<asp:ListItem>Label</asp:ListItem>
</asp:DropDownList>
</div>
</form>
</body>
</html>
// Default.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 Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void DropDownList1_SelectedIndexChanged(object sender, System.EventArgs e)
{
Label1.Text = "You Selected: " + DropDownList1.SelectedItem.Text;
}
}
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Default" %>
<!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 id="Head1" runat="server">
<title>How to use DropDownList AutoPostBack feature</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h2 style="color:Navy">DropDownList: AutoPostBack</h2>
<asp:Label
ID="Label1"
runat="server"
Font-Bold="true"
ForeColor="Purple"
Font-Size="Large"
>
</asp:Label>
<br /><br />
<asp:Label
ID="Label2"
runat="server"
Font-Bold="true"
ForeColor="OrangeRed"
Text="asp.net controls"
>
</asp:Label>
<asp:DropDownList
ID="DropDownList1"
runat="server"
AutoPostBack="true"
OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged"
>
<asp:ListItem>HyperLink</asp:ListItem>
<asp:ListItem>PasswordRecovery</asp:ListItem>
<asp:ListItem>PlaceHolder</asp:ListItem>
<asp:ListItem>LoginName</asp:ListItem>
<asp:ListItem>Label</asp:ListItem>
</asp:DropDownList>
</div>
</form>
</body>
</html>
// Default.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 Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void DropDownList1_SelectedIndexChanged(object sender, System.EventArgs e)
{
Label1.Text = "You Selected: " + DropDownList1.SelectedItem.Text;
}
}
// OUTPUT //
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