asp.net 2.0 的代码隐藏

Figure 1 Syntax in ASP.NET 2.0

Default.aspx

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

Default.aspx.cs

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

Figure 2 Implicit Server-Side Control Access

Default.aspx

<%@ Page Language="C#" AutoEventWireup="true"
CodeFile="Default.aspx.cs" Inherits="MsdnMag.Default" %>
<!DOCTYPE html PUBLIC "..." "...">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
Enter your name:
<asp:TextBox ID="_nameTextBox" runat="server" /><br />
<asp:Button ID="_enterButton" runat="server"
Text="Enter" OnClick="_enterButton_Click"/> <br />
<asp:Label ID="_messageLabel" runat="server" />
</div>
</form>
</body>
</html>

Default.aspx.cs

namespace MsdnMag
{
public partial class Default : System.Web.UI.Page
{
protected void _enterButton_Click(object sender, EventArgs e)
{
_messageLabel.Text = "Hello there " + _nameTextBox.Text + "!";
}
}
}

Figure 3 Class Generation with Codebehind

Class for ASPX file generated by ASP.NET

namespace ASP
{
public class default_aspx : MsdnMag.Default
{
...
}
}

Sibling partial class generated by ASP.NET

namespace MsdnMag
{
public partial class Default : IRequiresSessionState
{
protected TextBox  _nameTextBox;
protected Button   _enterButton;
protected Label    _messageLabel;
private   HtmlForm form1;
...
}
}

Codebehind partial class that you write

namespace MsdnMag
{
public partial class Default : Page
{
void _enterButton_Click(object sender, EventArgs e)
{
_messageLabel.Text = "Hello there " + _nameTextBox.Text + "!";
}
}
}