ASP.NET 2.0 new features [Simplified Code Behind Model]

From quickstart:

Simplified Code Behind Model New in 2.0

ASP.NET 2.0 introduces an improved runtime for code-behind pages that simplifies the connections between the page and code. In this new code-behind model, the page is declared as a partial class, which enables both the page and code files to be compiled into a single class at runtime. The page code refers to the code-behind file in the CodeFile attribute of the ``` @ Page ``` directive, specifying the class name in the Inherits attribute. Note that members of the code behind class must be either public or protected (they cannot be private).

C# CodeBehind Code Separation

The advantage of the simplified code-behind model over previous versions is that you do not need to maintain separate declarations of server control variables in the code-behind class . Using partial classes (new in 2.0) allows the server control IDs of the ASPX page to be accessed directly in the code-behind file . This greatly simplifies the maintenance of code-behind pages.

这对开发来说确实是一个改进,CodeBehind中去掉server control的声明会使代码"清爽"很多，看起来舒服多了。请看示例:

页面中我们放置一个textbox:

Test.aspx

1@ page language="C#" CodeFile="  Test  .aspx.cs" Inherits="Test_aspx"

< html >
< head >
< title > Test ASP.NET 2.0 < body >
< form runat="server" >
< asp:TextBox ID="TextBox1" Runat="server" />
< asp:Button ID="Button1" Text="Click Me" OnClick="Button1_Click" Runat="server" />
< br />
< br /> Test.aspx.cs

using System;

public partial class Test_aspx : System.Web.UI.Page
{
protected void Button1_Click( object sender, EventArgs e)
{
Response.Write ( "Hi,you have entered the word: " + TextBox1.Text);
}

} _
_