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<p class="2" style="MARGIN-TOP: 8.15pt; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">MyFormClass myForm = new MyFormClass();</span></p>
<p class="2" style="MARGIN-TOP: 0cm; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">myForm.Show();</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">这是非常简单的。但它的一个缺点是没有给调用代码发送任何通知，说明</span><span lang="EN-US">MyForm</span><span style="FONT-FAMILY: 宋体">已处理完，并退出。有时这并不重要，</span><span lang="EN-US">Show</span><span style="FONT-FAMILY: 宋体">方法工作得很好。如果需要提供某种通知，使用</span><span lang="EN-US">ShowDialog</span><span style="FONT-FAMILY: 宋体">方法是一种比较好的选择。</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">在调用</span><span lang="EN-US">Show</span><span style="FONT-FAMILY: 宋体">方法后，</span><span lang="EN-US">Show</span><span style="FONT-FAMILY: 宋体">方法后面的代码会立即执行。在调用</span><span lang="EN-US">ShowDialog</span><span style="FONT-FAMILY: 宋体">方法后，调用代码被暂停执行，等待关闭</span><span lang="EN-US">ShowDialog</span><span style="FONT-FAMILY: 宋体">方法调用的窗体。不仅调用代码被暂停执行，而且窗体也可以返回一个</span><span lang="EN-US">DialogResult</span><span style="FONT-FAMILY: 宋体">值。</span><span lang="EN-US">DialogResult</span><span style="FONT-FAMILY: 宋体">枚举是一组标识符，它们描述了对话框关闭的原因，包括</span><span lang="EN-US">OK</span><span style="FONT-FAMILY: 宋体">、</span><span lang="EN-US">Cancel</span><span style="FONT-FAMILY: 宋体">、</span><span lang="EN-US">Yes</span><span style="FONT-FAMILY: 宋体">、</span><span lang="EN-US">No</span><span style="FONT-FAMILY: 宋体">和其他几个标识符。为了让窗体返回一个</span><span lang="EN-US">DialogResult</span><span style="FONT-FAMILY: 宋体">值，必须设置窗体的</span><span lang="EN-US">DialogResult</span><span style="FONT-FAMILY: 宋体">属性，或者在窗体的一个按钮上设置</span><span lang="EN-US">DialogResult</span><span style="FONT-FAMILY: 宋体">属性。</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">例如，假定应用程序的一部分要求提供客户的电话号码。窗体包含一个输入电话号码的文本框，和两个按钮</span><span lang="EN-US">OK</span><span style="FONT-FAMILY: 宋体">和</span><span lang="EN-US">Cancel</span><span style="FONT-FAMILY: 宋体">。如果把</span><span lang="EN-US">OK</span><span style="FONT-FAMILY: 宋体">按钮的</span><span lang="EN-US">DialogResult</span><span style="FONT-FAMILY: 宋体">属性设置为</span><span lang="EN-US">DialogResult.OK</span><span style="FONT-FAMILY: 宋体">，把</span><span lang="EN-US">Cancel</span><span style="FONT-FAMILY: 宋体">按钮的</span><span lang="EN-US">DialogResult</span><span style="FONT-FAMILY: 宋体">属性设置为</span><span lang="EN-US">DialogResult.Cancel</span><span style="FONT-FAMILY: 宋体">，则在选择其中一个按钮时，窗体就会不可见，并给正调用的窗体返回相应的</span><span lang="EN-US">DialogResult</span><span style="FONT-FAMILY: 宋体">值。现在注意窗体没有释放，只是把</span><span lang="EN-US">Visible</span><span style="FONT-FAMILY: 宋体">属性设置为</span><span lang="EN-US">false</span><span style="FONT-FAMILY: 宋体">。这是因为仍必须从窗体中获取值。在这个示例中，我们需要电话号码。在窗体上为电话号码创建一个属性，这样父窗体就可以获取值，并调用窗体上的</span><span lang="EN-US">Close</span><span style="FONT-FAMILY: 宋体">方法了。下面就是子窗体的代码：</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; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US">using System.Drawing;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US">using System.Collections;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US">using System.ComponentModel;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US">using System.Windows.Forms;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> </span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US">namespace SimpleWinApp</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US">{</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> ///<summary></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> ///Summary description for Phone.</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> ///</summary></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> public class Phone : System.Windows.Forms.Form</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> {</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> private System.Windows.Forms.TextBox txtPhone;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> private System.Windows.Forms.Button btnOK;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> private System.Windows.Forms.Button btnCancel;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> private System.Windows.Forms.Label label1;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> ///<summary></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> ///Required designer variable</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> ///</summary></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> private System.ComponentModel.Container component = null;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> </span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> public Phone()</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> {</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> //</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> //Required for Windows Form Designer support</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> //</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> InitializeComponent();</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> </span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> //</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> //TODO: Add any constructor code after InitializeComponent call</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> //</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> }</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> </span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> ///<summary></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> ///Clean up any resource being used.</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 27.65pt"><span lang="EN-US"> ///</summary></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> protected override void Dispose(bool disposing)</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> {</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> if (disposing)</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> {</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> if (components != null)</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> {</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> components.Dispose();</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> }</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> }</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> base.Dispose(disposing);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> } </span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> </span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> #region Windows Form Designer generated code</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 27.65pt"><span lang="EN-US"> ///<summary></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 27.65pt"><span lang="EN-US"> ///Required method for Designer support – do not modify</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; 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; LINE-HEIGHT: 14.3pt; FTEL: 27.65pt"><span lang="EN-US"> ///</summary></span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> private void InitializeComponent()</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> {</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> this.txtPhone = new System.Windows.Forms.TextBox();</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> this. btnOK = new System.Windows.Forms.Button();</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US"> this. btnCancel = new System.Windows.Forms.Button();</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 36.85pt"><span lang="EN-US"> this. label1 = new System.Windows.Forms.label();</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 36.85pt"><span lang="EN-US"> this.SuspendLayout () ;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 36.85pt"><span lang="EN-US"> //</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 36.85pt"><span lang="EN-US"> // txtPhone</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 36.85pt"><span lang="EN-US"> //</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 36.85pt"><span lang="EN-US"> this.txtPhone.Location = new System.Drawing.Point(112,32);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this.txtPhone.Name = "txtPhone";</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this.txtPhone.TabIndex = 0;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this.txtPhone.Text = "";</span></p>
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