[示例出处]：本示例来自《C#入门经典》第三版中文版，P34Array-P353
[示例涉及]：
1、RadioBox、CheckBox控件的基本使用
2、Validating事件的使用(同[C#][SAMPLE][CODE][Control]TextBox和Validating事件的相关处理 )
3、多委托处理同一事件方法(同[C#][SAMPLE][CODE][Control]TextBox和Validating事件的相关处理 )
[示例代码]：2文件(其余默认)

Form1.Designer.cs
; 1namespace WA_TextBoxTest
; 2{
; 3;partial class Form1
; 4;{
; 5;;;;;/**//// <summary>
; 6;;;;;/// 必需的设计器变量。
; 7;;;;;/// </summary>
; 8;;;;;private System.ComponentModel.IContainer components = null;
; Array
;10;;;;;/**//// <summary>
;11;;;;;/// 清理所有正在使用的资源。
;12;;;;;/// </summary>
;13;;;;;/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
;14;;;;;protected override void Dispose(bool disposing)
;15;;;;;{
;16;if (disposing && (components != null))
;17;{
;18;;;;;components.Dispose();
;1Array;}
;20;base.Dispose(disposing);
;21;;;;;}
;22
;23;;;;;Windows 窗体设计器生成的代码#region Windows 窗体设计器生成的代码
;24
;25;;;;;/**//// <summary>
;26;;;;;/// 设计器支持所需的方法 - 不要
;27;;;;;/// 使用代码编辑器修改此方法的内容。
;28;;;;;/// </summary>
;2Array;;;;;private void InitializeComponent()
;30;;;;;{
;31;this.label1 = new System.Windows.Forms.Label();
;32;this.label2 = new System.Windows.Forms.Label();
;33;this.textBoxName = new System.Windows.Forms.TextBox();
;34;this.textBoxAddress = new System.Windows.Forms.TextBox();
;35;this.textBoxAge = new System.Windows.Forms.TextBox();
;36;this.textBoxOutput = new System.Windows.Forms.TextBox();
;37;this.label4 = new System.Windows.Forms.Label();
;38;this.label5 = new System.Windows.Forms.Label();
;3Array;this.buttonOK = new System.Windows.Forms.Button();
;40;this.buttonHelp = new System.Windows.Forms.Button();
;41;this.checkBoxProgrammer = new System.Windows.Forms.CheckBox();
;42;this.groupBoxSex = new System.Windows.Forms.GroupBox();
;43;this.radioButtonMale = new System.Windows.Forms.RadioButton();
;44;this.radioButtonFemale = new System.Windows.Forms.RadioButton();
;45;this.groupBoxSex.SuspendLayout();
;46;this.SuspendLayout();
;47;//
;48;// label1
;4Array;//
;50;this.label1.AutoSize = true;
;51;this.label1.Location = new System.Drawing.Point(26, 27);
;52;this.label1.Name = "label1";
;53;this.label1.Size = new System.Drawing.Size(5Array, 12);
;54;this.label1.TabIndex = 0;
;55;this.label1.Text = "labelName";
;56;//
;57;// label2
;58;//
;5Array;this.label2.AutoSize = true;
;60;this.label2.Location = new System.Drawing.Point(26, 53);
;61;this.label2.Name = "label2";
;62;this.label2.Size = new System.Drawing.Size(77, 12);
;63;this.label2.TabIndex = 1;
;64;this.label2.Text = "labelAddress";
;65;//
;66;// textBoxName
;67;//
;68;this.textBoxName.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
;6Array;;;;;| System.Windows.Forms.AnchorStyles.Right)));
;70;this.textBoxName.Location = new System.Drawing.Point(127, 24);
;71;this.textBoxName.Name = "textBoxName";
;72;this.textBoxName.Size = new System.Drawing.Size(317, 21);
;73;this.textBoxName.TabIndex = 2;
;74;//
;75;// textBoxAddress
;76;//
;77;this.textBoxAddress.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
;78;;;;;| System.Windows.Forms.AnchorStyles.Right)));
;7Array;this.textBoxAddress.Location = new System.Drawing.Point(127, 50);
;80;this.textBoxAddress.Multiline = true;
;81;this.textBoxAddress.Name = "textBoxAddress";
;82;this.textBoxAddress.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
;83;this.textBoxAddress.Size = new System.Drawing.Size(317, 102);
;84;this.textBoxAddress.TabIndex = 2;
;85;//
;86;// textBoxAge
;87;//
;88;this.textBoxAge.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
;8Array;;;;;| System.Windows.Forms.AnchorStyles.Right)));
;Array0;this.textBoxAge.Location = new System.Drawing.Point(127, 254);
;Array1;this.textBoxAge.Name = "textBoxAge";
;Array2;this.textBoxAge.Size = new System.Drawing.Size(ArrayArray, 21);
;Array3;this.textBoxAge.TabIndex = 4;
;Array4;this.textBoxAge.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.textBoxAge_KeyPress);
;Array5;//
;Array6;// textBoxOutput
;Array7;//
;Array8;this.textBoxOutput.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
;ArrayArray;;;;;| System.Windows.Forms.AnchorStyles.Left)
100;;;;;| System.Windows.Forms.AnchorStyles.Right)));
101;this.textBoxOutput.Location = new System.Drawing.Point(28, 307);
102;this.textBoxOutput.Multiline = true;
103;this.textBoxOutput.Name = "textBoxOutput";
104;this.textBoxOutput.ReadOnly = true;
105;this.textBoxOutput.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
106;this.textBoxOutput.Size = new System.Drawing.Size(416, 171);
107;this.textBoxOutput.TabIndex = 5;
108;//
10Array;// label4
110;//
111;this.label4.AutoSize = true;
112;this.label4.Location = new System.Drawing.Point(26, 257);
113;this.label4.Name = "label4";
114;this.label4.Size = new System.Drawing.Size(53, 12);
115;this.label4.TabIndex = 7;
116;this.label4.Text = "labelAge";
117;//
118;// label5
11Array;//
120;this.label5.AutoSize = true;
121;this.label5.Location = new System.Drawing.Point(26, 28Array);
122;this.label5.Name = "label5";
123;this.label5.Size = new System.Drawing.Size(71, 12);
124;this.label5.TabIndex = 8;
125;this.label5.Text = "labelOutput";
126;//
127;// buttonOK
128;//
12Array;this.buttonOK.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
130;this.buttonOK.Location = new System.Drawing.Point(458, 18);
131;this.buttonOK.Name = "buttonOK";
132;this.buttonOK.Size = new System.Drawing.Size(82, 21);
133;this.buttonOK.TabIndex = Array;
134;this.buttonOK.Text = "OK";
135;this.buttonOK.UseVisualStyleBackColor = true;
136;this.buttonOK.Click += new System.EventHandler(this.buttonOK_Click);
137;//
138;// buttonHelp
13Array;//
140;this.buttonHelp.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
141;this.buttonHelp.CausesValidation = false;
142;this.buttonHelp.Location = new System.Drawing.Point(458, 43);
143;this.buttonHelp.Name = "buttonHelp";
144;this.buttonHelp.Size = new System.Drawing.Size(82, 21);
145;this.buttonHelp.TabIndex = 10;
146;this.buttonHelp.Text = "Help";
147;this.buttonHelp.UseVisualStyleBackColor = true;
148;this.buttonHelp.Click += new System.EventHandler(this.buttonHelp_Click);
14Array;//
150;// checkBoxProgrammer
151;//
152;this.checkBoxProgrammer.AutoSize = true;
153;this.checkBoxProgrammer.Checked = true;
154;this.checkBoxProgrammer.CheckState = System.Windows.Forms.CheckState.Checked;
155;this.checkBoxProgrammer.Location = new System.Drawing.Point(28, 166);
156;this.checkBoxProgrammer.Name = "checkBoxProgrammer";
157;this.checkBoxProgrammer.Size = new System.Drawing.Size(84, 16);
158;this.checkBoxProgrammer.TabIndex = 11;
15Array;this.checkBoxProgrammer.Text = "Programmer";
160;this.checkBoxProgrammer.UseVisualStyleBackColor = true;
161;//
162;// groupBoxSex
163;//
164;this.groupBoxSex.Controls.Add(this.radioButtonMale);
165;this.groupBoxSex.Controls.Add(this.radioButtonFemale);
166;this.groupBoxSex.Location = new System.Drawing.Point(28, 188);
167;this.groupBoxSex.Name = "groupBoxSex";
168;this.groupBoxSex.Size = new System.Drawing.Size(415, 55);
16Array;this.groupBoxSex.TabIndex = 12;
170;this.groupBoxSex.TabStop = false;
171;this.groupBoxSex.Text = "Sex";
172;//
173;// radioButtonMale
174;//
175;this.radioButtonMale.AutoSize = true;
176;this.radioButtonMale.Location = new System.Drawing.Point(235, 24);
177;this.radioButtonMale.Name = "radioButtonMale";
178;this.radioButtonMale.Size = new System.Drawing.Size(113, 16);
17Array;this.radioButtonMale.TabIndex = 1;
180;this.radioButtonMale.Text = "radioButtonMale";
181;this.radioButtonMale.UseVisualStyleBackColor = true;
182;//
183;// radioButtonFemale
184;//
185;this.radioButtonFemale.AutoSize = true;
186;this.radioButtonFemale.Checked = true;
187;this.radioButtonFemale.Location = new System.Drawing.Point(55, 24);
188;this.radioButtonFemale.Name = "radioButtonFemale";
18Array;this.radioButtonFemale.Size = new System.Drawing.Size(125, 16);
1Array0;this.radioButtonFemale.TabIndex = 0;
1Array1;this.radioButtonFemale.TabStop = true;
1Array2;this.radioButtonFemale.Text = "radioButtonFemale";
1Array3;this.radioButtonFemale.UseVisualStyleBackColor = true;
1Array4;//
1Array5;// Form1
1Array6;//
1Array7;this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
1Array8;this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
1ArrayArray;this.ClientSize = new System.Drawing.Size(561, 4Array0);
200;this.Controls.Add(this.groupBoxSex);
201;this.Controls.Add(this.checkBoxProgrammer);
202;this.Controls.Add(this.buttonHelp);
203;this.Controls.Add(this.buttonOK);
204;this.Controls.Add(this.label5);
205;this.Controls.Add(this.label4);
206;this.Controls.Add(this.textBoxOutput);
207;this.Controls.Add(this.textBoxAge);
208;this.Controls.Add(this.textBoxAddress);
20Array;this.Controls.Add(this.textBoxName);
210;this.Controls.Add(this.label2);
211;this.Controls.Add(this.label1);
212;this.Name = "Form1";
213;this.Text = "Form1";
214;this.Validating += new System.ComponentModel.CancelEventHandler(this.textBoxEmpty_Validating);
215;this.groupBoxSex.ResumeLayout(false);
216;this.groupBoxSex.PerformLayout();
217;this.ResumeLayout(false);
218;this.PerformLayout();
21Array
220;;;;;}
221
222;;;;;#endregion
223
224;;;;;private System.Windows.Forms.Label label1;
225;;;;;private System.Windows.Forms.Label label2;
226;;;;;private System.Windows.Forms.TextBox textBoxName;
227;;;;;private System.Windows.Forms.TextBox textBoxAddress;
228;;;;;private System.Windows.Forms.TextBox textBoxAge;
22Array;;;;;private System.Windows.Forms.TextBox textBoxOutput;
230;;;;;private System.Windows.Forms.Label label4;
231;;;;;private System.Windows.Forms.Label label5;
232;;;;;private System.Windows.Forms.Button buttonOK;
233;;;;;private System.Windows.Forms.Button buttonHelp;
234;;;;;private System.Windows.Forms.CheckBox checkBoxProgrammer;
235;;;;;private System.Windows.Forms.GroupBox groupBoxSex;
236;;;;;private System.Windows.Forms.RadioButton radioButtonMale;
237;;;;;private System.Windows.Forms.RadioButton radioButtonFemale;
238;}
23Array}
240
241
Form1.cs
; 1using System;
; 2using System.Collections.Generic;
; 3using System.ComponentModel;
; 4using System.Data;
; 5using System.Drawing;
; 6using System.Text;
; 7using System.Windows.Forms;
; 8
; Arraynamespace WA_TextBoxTest
;10{
;11;public partial class Form1 : Form
;12;{
;13;;;;;public Form1()
;14;;;;;{
;15;InitializeComponent();
;16;this.buttonOK.Enabled = false;
;17
;18;//Tag values for testing if the data is valid.
;1Array;this.textBoxName.Tag = false;
;20;this.textBoxAddress.Tag = false;
;21;this.textBoxAge.Tag = false;
;22
;23;//订阅事件Subscriptions to events
;24;this.textBoxName.Validating += new CancelEventHandler(this.textBoxEmpty_Validating);
;25;this.textBoxAddress.Validating += new CancelEventHandler(this.textBoxEmpty_Validating);
;26;this.textBoxAge.Validating += new CancelEventHandler(this.textBoxEmpty_Validating);
;27
;28;//当控件中文本发生改变，就激发TextChanged事件。
;2Array;this.textBoxName.TextChanged +=new EventHandler(textBox_TextChanged);
;30;this.textBoxAddress.TextChanged+=new EventHandler(textBox_TextChanged);
;31;this.textBoxAge.TextChanged += new EventHandler(textBox_TextChanged);
;32;;;;;}
;33
;34;;;;;private void buttonOK_Click(object sender, EventArgs e)
;35;;;;;{
;36;//No testing for invalid values are made ,as that should not be necessary
;37;string output;
;38;
;3Array;//Concatenate the text values of for TextBoxes.
;40;output = "Name:" + this.textBoxName.Text + "＼r＼n";
;41;output += "Address:" + this.textBoxAddress.Text + "＼r＼n";
;42;output += "Occupation:" + (string)(this.checkBoxProgrammer.Checked ?
;43;;;;;"Programmer" : "Not a programmer") + "＼r＼n";;//此句等价于下面这句
;44;output += "Occupation:" + (string)(this.checkBoxProgrammer.Checked ?
;45;;;;;this.checkBoxProgrammer.Text : ("Not a "+this.checkBoxProgrammer.Text)) + "＼r＼n";
;46;output += "Sex:" + (string)(this.radioButtonFemale.Checked ?
;47;;;;;"Female" : "Male") + "＼r＼n";;//此句等价于下面这句
;48;output += "Sex:" + (string)(this.radioButtonFemale.Checked ?
;4Array;;;;;this.radioButtonFemale.Text : this.radioButtonMale.Text) + "＼r＼n";
;50;output += "Age:" + this.textBoxAge.Text;
;51
;52;//Insert the new text.
;53;this.textBoxOutput.Text = output;
;54;;;;;}
;55
;56;;;;;private void buttonHelp_Click(object sender, EventArgs e)
;57;;;;;{
;58;//Write a short description of each TextBox in the Output TextBox.
;5Array;string output;
;60
;61;output = "Name=Your name＼r＼n";
;62;output += "Address=Your address＼r＼n";
;63;output += "Programmer=Check Programmer if you are a programmer＼r＼n";
;64;output += "Sex=Choose your sex＼r＼n";
;65;output += "Age=Your age";
;66
;67;//Insert the new text.
;68;this.textBoxOutput.Text = output;
;6Array;;;;;}
;70
;71;;;;;private void textBoxEmpty_Validating(object sender, CancelEventArgs e)
;72;;;;;{
;73;//我们知道这个sender是一个对话框，所以我们将他们强制转换为TextBox
;74;TextBox tb = (TextBox)sender;
;75
;76;//如果对话框是空的话我们设置TextBox背景色为红色来象征问题。
;77;//如果控件有valid信息，我们就使用控件的Tag值来指出。
;78;if (tb.Text.Length == 0)
;7Array;{
;80;;;;;tb.BackColor = Color.Red;
;81;;;;;tb.Tag = false;
;82;;;;;//在这个例子中我们不想取消further processing
;83;;;;;//但是如果我们想要这么做的话，我们只需要添加以下一行：
;84;;;;;//e.Cancel=true;
;85;}
;86;else
;87;{
;88;;;;;this.BackColor = SystemColors.Window;
;8Array;;;;;tb.Tag = true;
;Array0;}
;Array1;//Finally ,we call ValidateOK which will set the value of the OK button.
;Array2;ValidateOK();
;Array3;;;;;}
;Array4
;Array5;;;;;private void textBoxAge_KeyPress(object sender, KeyPressEventArgs e)
;Array6;;;;;{
;Array7;if ((e.KeyChar < 48 || e.KeyChar > 57) && e.KeyChar != 8)
;Array8;{
;ArrayArray;;;;;e.Handled = true;//Remove the character
100;;;;;//等于true告诉用户不应该对字符进行任何操作
101;}
102;;;;;}
103
104;;;;;private void textBox_TextChanged(object sender, EventArgs e)
105;;;;;{
106;//Cast the sender object to a TextBox
107;TextBox tb = (TextBox)sender;
108
10Array;//Test if the data is valid and set the tag and back ground color accordingly.
110;if (tb.Text.Length == 0)
111;{
112;;;;;tb.Tag = false;
113;;;;;tb.BackColor = Color.Red;
114;}
115;else
116;{
117;;;;;tb.Tag = true;
118;;;;;tb.BackColor = SystemColors.Window;
11Array;}
120
121;//Call ValidateOK to set the OK button
122;ValidateOK();
123;;;;;}
124
125;;;;;private void ValidateOK()
126;;;;;{
127;//Set the OK button to enabled if all the Tags are true
128;this.buttonOK.Enabled = ((bool)(this.textBoxName.Tag) &&
12Array;;;;;(bool)(this.textBoxAge.Tag) &&
130;;;;;(bool)(this.textBoxAddress.Tag));
131;;;;;}
132;}
133}
[示例说明]：
1、开发语言：C#
2、开发环境：Visual Studio.Net 2005 Team suite
3、开发模板：C#.net项目->Windows应用程序

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