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<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>using
System.Web.SessionState;</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>using
System.Web.UI;</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>using
System.Web.UI.WebControls;</span></p>
<p class=2 style='margin-top:0cm;margin-right:0cm;FTEL:8.15pt;
margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>using
System.Web.UI.HtmlControls;</span></p>
<p class=MsoNormal><span style='font-family:宋体'>接着是</span><span lang=EN-US>Web</span><span
style='font-family:宋体'>应用程序的命名空间声明，其后是</span><span lang=EN-US>WebForm1</span><span
style='font-family:宋体'>的定义，它是</span><span lang=EN-US>.aspx</span><span
style='font-family:宋体'>页面使用的基类。该类继承用于</span><span lang=EN-US>Web</span><span
style='font-family:宋体'>窗体的</span><span lang=EN-US>System.Web.UI.Page</span><span
style='font-family:宋体'>基类：</span></p>
<p class=2 style='margin-top:8.15pt;margin-right:0cm;FTEL:0cm;
margin-left:21.45pt;FTEL:.0001pt;FTEL:18.45pt'><span
lang=EN-US>namespace PCSWebApp1</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>{</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
/// <summary></span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
/// Summary description for WebForm1.</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
/// </summary></span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
public class WebForm1 : System.Web.UI.Page</span></p>
<p class=2 style='margin-top:0cm;margin-right:0cm;FTEL:8.15pt;
margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US> {</span></p>
<p class=MsoNormal><span style='font-family:宋体'>这个窗体中的其他代码执行各种初始化任务，包括在</span><span
lang=EN-US>VS.NET</span><span style='font-family:宋体'>中设计</span><span
lang=EN-US>Web</span><span style='font-family:宋体'>窗体所需要的代码。没有包含构造函数</span><span
lang=EN-US>(</span><span style='font-family:宋体'>使用了</span><span lang=EN-US>.NET</span><span
style='font-family:宋体'>的默认构造函数</span><span lang=EN-US>)</span><span
style='font-family:宋体'>，但有一个事件处理程序</span><span lang=EN-US>Page_Load()</span><span
style='font-family:宋体'>，在其中可以添加在加载页面时需要的代码：</span></p>
<p class=2 style='margin-top:8.15pt;margin-right:0cm;FTEL:0cm;
margin-left:21.45pt;FTEL:.0001pt;FTEL:18.45pt'><span
lang=EN-US> private void Page</span><span
lang=EN-US style='font-family:"Baskerville BE Regular"'>_</span><span
lang=EN-US>Load(object sender, System.EventArgs e)</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
{</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
// Put user code to initialize the page here</span></p>
<p class=2 style='margin-top:0cm;margin-right:0cm;FTEL:8.15pt;
margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
}</span></p>
<p class=MsoNormal><span style='font-family:宋体'>剩下的代码包含在一个</span><span
lang=EN-US>#region</span><span style='font-family:宋体'>块中。要查看它，需要扩展它：</span></p>
<p class=2 style='margin-top:8.15pt;margin-right:0cm;FTEL:0cm;
margin-left:21.45pt;FTEL:.0001pt;FTEL:18.45pt'><span
lang=EN-US> #region Web Form Designer generated
code</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
override protected void OnInit(EventArgs e)</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
{</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
//</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
// CODEGEN: This call is required by the ASP.NET Web Form Designer.</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
//</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
InitializeComponent();</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
base.OnInit(e);</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
}</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
/// <summary></span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
/// Required method for Designer support - do not modify</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
/// the contents of this method with the code editor.</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
/// </summary></span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
private void InitializeComponent()</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
{ </span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
this.Load += new System.EventHandler(this.Page</span><span lang=EN-US
style='font-family:"Baskerville BE Regular"'>_</span><span lang=EN-US>Load);</span></p>
<p class=2 style='margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
}</span></p>
<p class=2 style='margin-top:0cm;margin-right:0cm;FTEL:8.15pt;
margin-left:21.45pt;FTEL:18.45pt'><span lang=EN-US>
#endregion</span></p>
<p class=MsoNormal><span style='font-family:宋体'>其中重写了从</span><span lang=EN-US>System.Web.UI.Control</span><span
style='font-family:宋体'>继承而来的</span><span lang=EN-US>OnInit()</span><span
style='font-family:宋体'>事件处理程序。这个处理程序在页面初始化时执行，其结果是在处理</span><span lang=EN-US>OnInit()</span><span
style='font-family:宋体'>的基本实现时调用</span><span lang=EN-US>InitializeComponent()</span><span
style='font-family:宋体'>。</span><span lang=EN-US>InitializeComponent()</span><span
style='font-family:宋体'>仅把</span><span lang=EN-US>Page</span><span lang=EN-US
style='font-family:"Baskerville BE Regular"'>_</span><span lang=EN-US>Load()</span><span
style='font-family:宋体'>事件处理程序封装在页面的</span><span lang=EN-US>Load</span><span
style='font-family:宋体'>事件中，这是必要的，因为</span><span lang=EN-US>AutoEventWireup</span><span
style='font-family:宋体'>设置为</span><span lang=EN-US>false</span><span
style='font-family:宋体'>。</span></p>
<p class=MsoNormal><span style='font-family:宋体'>严格地说，简单的</span><span
lang=EN-US>ASP.NET Web</span><span style='font-family:宋体'>窗体页面所需要的代码比这里列出的要多。但创建的结构可以使用</span><span
lang=EN-US>C#</span><span style='font-family:宋体'>技巧来重复使用和扩展，且不会增加过多的系统开销，所以后面就使用这个结构。</span></p>
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<div style='float:left;width:49%'>·<a href='100165652.htm'>23.9 在XML中串行化对象</a></div><div style='float:right;width:49%'>·<a href='100165653.htm'>23.10 小结</a></div><div style='float:left;width:49%'>·<a href='100165679.htm'>25.1 ASP.NET概述</a></div><div style='float:right;width:49%'>·<a href='100165681.htm'>25.2 ASP.NET Web窗体(2)</a></div><div style='float:left;width:49%'>·<a href='100165682.htm'>25.2 ASP.NET Web窗体(3)</a></div><div style='float:right;width:49%'>·<a href='100165683.htm'>25.3 ADO.NET和数据绑定</a></div></div>
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