100165555.htm

C#高级编程(第三版),顶死你们。。 。up

<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 36.85pt"><span lang="EN-US">&nbsp;&nbsp;&nbsp; //</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 36.85pt"><span lang="EN-US">&nbsp;&nbsp;&nbsp; // btnOK </span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 36.85pt"><span lang="EN-US">&nbsp;&nbsp;&nbsp; //</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this. btnOK.DialogResult = System.Windows.Forms.DialogResult.OK;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this. btnOK. Location = new System.Drawing.Point(48,88);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this. btnOK. Name = &quot;btnOK&quot;;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this. btnOK. TabIndex = 1;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this. btnOK. Text = &quot;OK&quot;;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 36.85pt"><span lang="EN-US">&nbsp;&nbsp;&nbsp; //</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 36.85pt"><span lang="EN-US">&nbsp;&nbsp;&nbsp; // btnCancel</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 36.85pt"><span lang="EN-US">&nbsp;&nbsp;&nbsp; //</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this. btnCancel.DialogResult = System.Windows.Forms.DialogResult. Cancel;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this. btnCancel. Location = new System.Drawing.Point(152,88);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this. btnCancel. Name = &quot;btnCancel&quot;;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this. btnCancel. TabIndex = 2;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this. btnCancel. Text = &quot;Cancel&quot;;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 36.85pt"><span lang="EN-US">&nbsp;&nbsp;&nbsp; //</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 36.85pt"><span lang="EN-US">&nbsp;&nbsp;&nbsp; // label1</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 36.85pt"><span lang="EN-US">&nbsp;&nbsp;&nbsp; //</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 36.85pt"><span lang="EN-US">&nbsp;&nbsp;&nbsp; this. label1.Location = new System.Drawing.Point(8,32);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this. label1.Name = &quot;label1&quot;;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this. label1.TabIndex = 3;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this. label1.Text = &quot;Enter Phone #:&quot;;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this. label1.TextAlign = System.Drawing.ContentAlignment.MiddleRight;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">//</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">//Phone</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">//</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this.AutoScaleBaseSize = new System.Drawing.Size(5,13);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this.ClientSize = new System.Drawing.Size(264,155);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this.ControlBox = false;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this.Controls.Add(this.label1);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this.Controls.Add(this.btnCancel);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this.Controls.Add(this.btnOK);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this.Controls.Add(this.txtPhone);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this.HelpButton = true;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this.MaximizeBox = false;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this.MinimizeBox = false;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this.Name = &quot;Phone&quot;;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this.ShowInTaskbar = false;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this.Text = &quot;Phone&quot;;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 55.6pt"><span lang="EN-US">this.ResumeLayout(false);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 41.5pt"><span lang="EN-US">}</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 41.5pt"><span lang="EN-US">#endregion</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 41.5pt"><span lang="EN-US">&nbsp;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 41.5pt"><span lang="EN-US">public string PhoneNumber</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 41.5pt"><span lang="EN-US">{</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 41.5pt"><span lang="EN-US">&nbsp; get {return txtPhone.Text;}</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 41.5pt"><span lang="EN-US">&nbsp; set { txtPhone.Text = value;}</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 41.5pt"><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">&nbsp;</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; LINE-HEIGHT: 14.3pt; FTEL: 18.45pt"><span lang="EN-US">&nbsp; }</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">上面是</span><span lang="EN-US">Phone</span><span style="FONT-FAMILY: 宋体">窗体的完整代码。首先要注意，不包含处理按钮单击事件的代码。因为设置了每个按钮的</span><span lang="EN-US">DialogResult</span><span style="FONT-FAMILY: 宋体">属性，所以在单击</span><span lang="EN-US">OK</span><span style="FONT-FAMILY: 宋体">或</span><span lang="EN-US">Cancel</span><span style="FONT-FAMILY: 宋体">按钮后，窗体就消失了。添加的惟一属性是</span><span lang="EN-US">PhoneNumber</span><span style="FONT-FAMILY: 宋体">。下面的代码显示了父窗体中调用</span><span lang="EN-US">Phone</span><span style="FONT-FAMILY: 宋体">对话框的方法：</span></p>
<p class="2" style="MARGIN-TOP: 8.15pt; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">Phone frm = new Phone();</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US">frm.ShowDialog();</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 18.45pt"><span lang="EN-US">if (frm. DialogResult == DialogResult.OK)</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">&nbsp; MessageBox.Show(&quot;Phone number is &quot; + frm.PhoneNumber);</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">else if(frm. DialogResult == DialogResult.cancel)</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">&nbsp; MessageBox.Show(&quot;Form was canceled. &quot;);</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">frm.Close();</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">这看起来非常简单。创建新的</span><span lang="EN-US">Phone</span><span style="FONT-FAMILY: 宋体">对象</span><span lang="EN-US">(frm)</span><span style="FONT-FAMILY: 宋体">，在调用</span><span lang="EN-US">frm.ShowDialog()</span><span style="FONT-FAMILY: 宋体">方法时，这个方法中的代码会停止执行，等待</span><span lang="EN-US">Phone</span><span style="FONT-FAMILY: 宋体">窗体返回。接着检查</span><span lang="EN-US">Phone</span><span style="FONT-FAMILY: 宋体">窗体的</span><span lang="EN-US">DialogResult</span><span style="FONT-FAMILY: 宋体">属性。由于窗体还未释放，是不可见的，所以仍可以访问公共属性，其中一个公共属性就是</span><span lang="EN-US">PhoneNumber</span><span style="FONT-FAMILY: 宋体">。一旦获取了需要的数据，就可以调用窗体的</span><span lang="EN-US">Close</span><span style="FONT-FAMILY: 宋体">方法。</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">一切正常，但如果返回的电话号码格式不正确，该怎么办？如果把</span><span lang="EN-US">ShowDialog</span><span style="FONT-FAMILY: 宋体">放在循环中，就可以再次调用它，让用户重新输入值。这样就可以得到正确的值，或处理用户单击</span><span lang="EN-US">Cancel</span><span style="FONT-FAMILY: 宋体">的操作：</span></p>
<p class="2" style="MARGIN-TOP: 8.15pt; MARGIN-LEFT: 21.45pt; MARGIN-RIGHT: 0cm; FTEL: 18.45pt"><span lang="EN-US">while(true)</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">frm.ShowDialog();</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 27.65pt"><span lang="EN-US">if (frm. DialogResult == DialogResult.OK)</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 27.65pt"><span lang="EN-US">{</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 27.65pt"><span lang="EN-US">&nbsp; MessageBox.Show(&quot;Phone number is &quot; + frm.PhoneNumber);</span></p>
<p class="2" style="MARGIN-LEFT: 21.45pt; FTEL: 27.65pt"><span lang="EN-US">&nbsp; If(frm.PhoneNumber.Length ==8 | frm.PhoneNumber.Length == 12)</span></p>