[C#][SAMPLE][CODE][Control]RadioBox、CheckBox和Validating事件的相关处理

[示例出处]：本示例来自《C#入门经典》第三版中文版，P349-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

namespace 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;
9

/**//// <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();
19

}
20

base.Dispose(disposing);
21

}
22

Windows 窗体设计器生成的代码#region Windows 窗体设计器生成的代码
24

/**//// <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>
29

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();
39

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
49

//
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(59, 12);
54

this.label1.TabIndex = 0;
55

this.label1.Text = "labelName";
56

//
57

// label2
58

//
59

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);
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this.label2.TabIndex = 1;
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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)
69

| 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)));
79

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)
89

| System.Windows.Forms.AnchorStyles.Right)));
90

this.textBoxAge.Location = new System.Drawing.Point(127, 254);
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this.textBoxAge.Name = "textBoxAge";
92

this.textBoxAge.Size = new System.Drawing.Size(99, 21);
93

this.textBoxAge.TabIndex = 4;
94

this.textBoxAge.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.textBoxAge_KeyPress);
95

//
96

// textBoxOutput
97

//
98

this.textBoxOutput.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
99

| 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

//
109

// 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
119

//
120

this.label5.AutoSize = true;
121

this.label5.Location = new System.Drawing.Point(26, 289);
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

//
129

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 = 9;
134

this.buttonOK.Text = "OK";
135

this.buttonOK.UseVisualStyleBackColor = true;
136

this.buttonOK.Click += new System.EventHandler(this.buttonOK_Click);
137

//
138

// buttonHelp
139

//
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);
149

//
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;
159

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);
169

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);
179

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";
189

this.radioButtonFemale.Size = new System.Drawing.Size(125, 16);
190

this.radioButtonFemale.TabIndex = 0;
191

this.radioButtonFemale.TabStop = true;
192

this.radioButtonFemale.Text = "radioButtonFemale";
193

this.radioButtonFemale.UseVisualStyleBackColor = true;
194

//
195

// Form1
196

//
197

this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
198

this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
199

this.ClientSize = new System.Drawing.Size(561, 490);
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);
209

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();
219

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;
229

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

}
239

}
240

241

Form1.cs

using System;
2

using System.Collections.Generic;
3

using System.ComponentModel;
4

using System.Data;
5

using System.Drawing;
6

using System.Text;
7

using System.Windows.Forms;
8

namespace WA_TextBoxTest
10

{
11

public partial class Form1 : Form
12

{
13

public Form1()
14

{
15

InitializeComponent();
16

this.buttonOK.Enabled = false;
17

//Tag values for testing if the data is valid.
19

this.textBoxName.Tag = false;
20

this.textBoxAddress.Tag = false;
21

this.textBoxAge.Tag = false;
22

//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

//当控件中文本发生改变，就激发TextChanged事件。
29

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

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

//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 ?
49

this.radioButtonFemale.Text : this.radioButtonMale.Text) + "\r\n";
50

output += "Age:" + this.textBoxAge.Text;
51

//Insert the new text.
53

this.textBoxOutput.Text = output;
54

}
55

private void buttonHelp_Click(object sender, EventArgs e)
57

{
58

//Write a short description of each TextBox in the Output TextBox.
59

string output;
60

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

//Insert the new text.
68

this.textBoxOutput.Text = output;
69

}
70

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

//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)
79

{
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;
89

tb.Tag = true;
90

}
91

//Finally ,we call ValidateOK which will set the value of the OK button.
92

ValidateOK();
93

}
94

private void textBoxAge_KeyPress(object sender, KeyPressEventArgs e)
96

{
97

if ((e.KeyChar < 48 || e.KeyChar > 57) && e.KeyChar != 8)
98

{
99

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

109

//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;
119

}
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) &&
129

(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

转载于:https://www.cnblogs.com/volnet/archive/2006/11/27/574437.html

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