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<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">在</span><span lang="EN-US">Visual Studio .NET</span><span style="FONT-FAMILY: 宋体">中生成这个示例时，它会是什么样子？查看下面的代码：</span></p>
<p class="2" style="MARGIN-TOP: 8.15pt; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">using System;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US">using System.Drawing;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US">using System.Collections;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US">using System.ComponentModel;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US">using System.Windows.Forms;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US">using System.Data;</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">namespace VSNETForm</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 Form1.</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 calss Form1 : System.Windows.Forms.Form</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: 27.65pt"><span lang="EN-US"> ///<summary></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 27.65pt"><span lang="EN-US"> ///Required designer variable.</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 27.65pt"><span lang="EN-US"> ///</summary></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> private System.ComponentModel.Container components = null;</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: 27.65pt"><span lang="EN-US"> public Form1()</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: 41.5pt"><span lang="EN-US"> //</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 41.5pt"><span lang="EN-US"> //Required for Windows Form Designer support</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"> </span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 41.5pt"><span lang="EN-US"> //</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 41.5pt"><span lang="EN-US"> //TODO: Add any constructor code after InitializeComponent call</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 41.5pt"><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"> </span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 27.65pt"><span lang="EN-US"> ///<summary></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 27.65pt"><span lang="EN-US"> ///Clean up any resource being used.</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 27.65pt"><span lang="EN-US"> ///</summary></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"> protected override void Dispose(bool disposing)</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"> if (disposing)</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"> if (components != null)</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"> components.Dispose();</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"> base.Dispose(disposing);</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"> #region Windows Form Designer generated code</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 27.65pt"><span lang="EN-US"> ///<summary></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 27.65pt"><span lang="EN-US"> ///Required mothed for Designer support – do not modify</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 27.65pt"><span lang="EN-US"> ///the contents of this method with the code editor.</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 27.65pt"><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.components = new System.ComponentModel.Container();</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> this.size = new System.Drawing.Size(300,300);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> this.Text = "Form1";</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"> #endregion</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: 27.65pt"><span lang="EN-US"> ///<summary></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 27.65pt"><span lang="EN-US"> ///The main entry point for the application.</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 27.65pt"><span lang="EN-US"> ///</summary></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> [STAThread] </span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US"> static void Main()</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"> Application.Run(new Form1());</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-TOP: 0cm; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">}</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">首先，这个示例应用程序的代码比较长。在类的开头有好几个</span><span lang="EN-US">using</span><span style="FONT-FAMILY: 宋体">语句，在本例中大多数是不必要的。但保留它们并无大碍。类</span><span lang="EN-US">Form1</span><span style="FONT-FAMILY: 宋体">派生于</span><span lang="EN-US">System.Windows.Forms</span><span style="FONT-FAMILY: 宋体">，与前面的</span><span lang="EN-US">Notepad</span><span style="FONT-FAMILY: 宋体">示例一样，但代码从一开始就不同。第一行代码如下：</span></p>
<p class="2" style="MARGIN-TOP: 8.15pt; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US"> private System.ComponentModel.Container components = null;</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">在这个示例中，这行代码并没有做什么工作，它只是在窗体中添加组件时才起作用。当给窗体添加组件时，也就把这行代码添加给了组件对象，该代码是一个容器。添加这个容器的原因与窗体的释放有关。窗体类支持</span><span lang="EN-US">IDisposable</span><span style="FONT-FAMILY: 宋体">接口，因为它是在</span><span lang="EN-US">Component</span><span style="FONT-FAMILY: 宋体">类中执行的。在组件被添加到组件容器中时，容器将确保组件被正确地跟踪，并在释放窗体时释放它。如果查看代码中的</span><span lang="EN-US">Dispose</span><span style="FONT-FAMILY: 宋体">方法，就可以看到它：</span></p>
<p class="2" style="MARGIN-TOP: 8.15pt; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US"> protected override void Dispose(bool disposing)</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"> if (disposing)</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"> if (components != null)</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"> components.Dispose();</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"> base.Dispose(disposing);</span></p>
<p class="2" style="MARGIN-TOP: 0cm; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US"> } </span></p>
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