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Listing 1.14 - FirstPageCodeBehind.aspx, Listing 1.15 - FirstPageCodeBehind.aspx.cs

Illustrates how to create a code-behind ASP.NET page.

Listing 1.14 - FirstPageCodeBehind.aspx (C#)
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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="FirstPageCodeBehind.aspx.cs" Inherits="FirstPageCodeBehind" %>
<!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>First Page Code-Behind</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
    <asp:Button
        id="Button1"
        Text="Click Here"
        OnClick="Button1_Click"
        Runat="server" />
    
    <br /><br />
        
    <asp:Label
        id="Label1"
        Runat="server" />    
    
    </div>
    </form>
</body>
</html>

Here is the code behind file that corresponds to the page above.

Listing 1.15 - FirstPageCodeBehind.aspx.cs (C#)
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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 FirstPageCodeBehind : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Label1.Text = "Click the Button";
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        Label1.Text = "Thanks!";
    }
}