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

最新推荐文章于 2024-09-02 08:50:49 发布

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最新推荐文章于 2024-09-02 08:50:49 发布

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CC 4.0 BY-SA版权

文章标签： c#

原文链接：http://www.cnblogs.com/volnet/archive/2006/11/27/574437.html

本文介绍了一个C#窗体验证的示例程序，演示了如何使用TextBox、CheckBox及RadioButton控件，并通过Validating事件确保输入的有效性。示例还展示了如何在用户输入不完整时进行提示。

[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。
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/// </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>
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protected override void Dispose(bool disposing)
15

{
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if (disposing && (components != null))
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{
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components.Dispose();
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}
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base.Dispose(disposing);
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}
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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

{
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this.label1 = new System.Windows.Forms.Label();
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this.label2 = new System.Windows.Forms.Label();
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this.textBoxName = new System.Windows.Forms.TextBox();
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this.textBoxAddress = new System.Windows.Forms.TextBox();
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this.textBoxAge = new System.Windows.Forms.TextBox();
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this.textBoxOutput = new System.Windows.Forms.TextBox();
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this.label4 = new System.Windows.Forms.Label();
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this.label5 = new System.Windows.Forms.Label();
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this.buttonOK = new System.Windows.Forms.Button();
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this.buttonHelp = new System.Windows.Forms.Button();
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this.checkBoxProgrammer = new System.Windows.Forms.CheckBox();
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this.groupBoxSex = new System.Windows.Forms.GroupBox();
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this.radioButtonMale = new System.Windows.Forms.RadioButton();
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this.radioButtonFemale = new System.Windows.Forms.RadioButton();
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this.groupBoxSex.SuspendLayout();
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this.SuspendLayout();
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//
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// label1
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//
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this.label1.AutoSize = true;
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this.label1.Location = new System.Drawing.Point(26, 27);
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this.label1.Name = "label1";
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this.label1.Size = new System.Drawing.Size(59, 12);
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this.label1.TabIndex = 0;
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this.label1.Text = "labelName";
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//
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// label2
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//
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this.label2.AutoSize = true;
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this.label2.Location = new System.Drawing.Point(26, 53);
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this.label2.Name = "label2";
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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";
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//
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// textBoxName
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//
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this.textBoxName.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
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| System.Windows.Forms.AnchorStyles.Right)));
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this.textBoxName.Location = new System.Drawing.Point(127, 24);
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this.textBoxName.Name = "textBoxName";
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this.textBoxName.Size = new System.Drawing.Size(317, 21);
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this.textBoxName.TabIndex = 2;
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//
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// textBoxAddress
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//
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this.textBoxAddress.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
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| System.Windows.Forms.AnchorStyles.Right)));
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this.textBoxAddress.Location = new System.Drawing.Point(127, 50);
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this.textBoxAddress.Multiline = true;
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this.textBoxAddress.Name = "textBoxAddress";
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this.textBoxAddress.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
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this.textBoxAddress.Size = new System.Drawing.Size(317, 102);
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this.textBoxAddress.TabIndex = 2;
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//
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// textBoxAge
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//
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this.textBoxAge.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
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| System.Windows.Forms.AnchorStyles.Right)));
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this.textBoxAge.Location = new System.Drawing.Point(127, 254);
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this.textBoxAge.Name = "textBoxAge";
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this.textBoxAge.Size = new System.Drawing.Size(99, 21);
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this.textBoxAge.TabIndex = 4;
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this.textBoxAge.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.textBoxAge_KeyPress);
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//
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// textBoxOutput
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//
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this.textBoxOutput.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
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| System.Windows.Forms.AnchorStyles.Left)
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| System.Windows.Forms.AnchorStyles.Right)));
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this.textBoxOutput.Location = new System.Drawing.Point(28, 307);
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this.textBoxOutput.Multiline = true;
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this.textBoxOutput.Name = "textBoxOutput";
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this.textBoxOutput.ReadOnly = true;
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this.textBoxOutput.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
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this.textBoxOutput.Size = new System.Drawing.Size(416, 171);
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this.textBoxOutput.TabIndex = 5;
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//
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// label4
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//
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this.label4.AutoSize = true;
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this.label4.Location = new System.Drawing.Point(26, 257);
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this.label4.Name = "label4";
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this.label4.Size = new System.Drawing.Size(53, 12);
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this.label4.TabIndex = 7;
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this.label4.Text = "labelAge";
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//
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// label5
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//
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this.label5.AutoSize = true;
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this.label5.Location = new System.Drawing.Point(26, 289);
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this.label5.Name = "label5";
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this.label5.Size = new System.Drawing.Size(71, 12);
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this.label5.TabIndex = 8;
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this.label5.Text = "labelOutput";
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//
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// buttonOK
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//
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this.buttonOK.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
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this.buttonOK.Location = new System.Drawing.Point(458, 18);
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this.buttonOK.Name = "buttonOK";
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this.buttonOK.Size = new System.Drawing.Size(82, 21);
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this.buttonOK.TabIndex = 9;
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this.buttonOK.Text = "OK";
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this.buttonOK.UseVisualStyleBackColor = true;
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this.buttonOK.Click += new System.EventHandler(this.buttonOK_Click);
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//
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// buttonHelp
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//
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this.buttonHelp.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
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this.buttonHelp.CausesValidation = false;
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this.buttonHelp.Location = new System.Drawing.Point(458, 43);
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this.buttonHelp.Name = "buttonHelp";
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this.buttonHelp.Size = new System.Drawing.Size(82, 21);
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this.buttonHelp.TabIndex = 10;
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this.buttonHelp.Text = "Help";
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this.buttonHelp.UseVisualStyleBackColor = true;
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this.buttonHelp.Click += new System.EventHandler(this.buttonHelp_Click);
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//
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// checkBoxProgrammer
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//
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this.checkBoxProgrammer.AutoSize = true;
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this.checkBoxProgrammer.Checked = true;
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this.checkBoxProgrammer.CheckState = System.Windows.Forms.CheckState.Checked;
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this.checkBoxProgrammer.Location = new System.Drawing.Point(28, 166);
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this.checkBoxProgrammer.Name = "checkBoxProgrammer";
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this.checkBoxProgrammer.Size = new System.Drawing.Size(84, 16);
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this.checkBoxProgrammer.TabIndex = 11;
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this.checkBoxProgrammer.Text = "Programmer";
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this.checkBoxProgrammer.UseVisualStyleBackColor = true;
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//
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// groupBoxSex
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//
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this.groupBoxSex.Controls.Add(this.radioButtonMale);
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this.groupBoxSex.Controls.Add(this.radioButtonFemale);
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this.groupBoxSex.Location = new System.Drawing.Point(28, 188);
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this.groupBoxSex.Name = "groupBoxSex";
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this.groupBoxSex.Size = new System.Drawing.Size(415, 55);
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this.groupBoxSex.TabIndex = 12;
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this.groupBoxSex.TabStop = false;
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this.groupBoxSex.Text = "Sex";
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//
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// radioButtonMale
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//
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this.radioButtonMale.AutoSize = true;
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this.radioButtonMale.Location = new System.Drawing.Point(235, 24);
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this.radioButtonMale.Name = "radioButtonMale";
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this.radioButtonMale.Size = new System.Drawing.Size(113, 16);
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this.radioButtonMale.TabIndex = 1;
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this.radioButtonMale.Text = "radioButtonMale";
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this.radioButtonMale.UseVisualStyleBackColor = true;
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//
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// radioButtonFemale
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//
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this.radioButtonFemale.AutoSize = true;
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this.radioButtonFemale.Checked = true;
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this.radioButtonFemale.Location = new System.Drawing.Point(55, 24);
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this.radioButtonFemale.Name = "radioButtonFemale";
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this.radioButtonFemale.Size = new System.Drawing.Size(125, 16);
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this.radioButtonFemale.TabIndex = 0;
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this.radioButtonFemale.TabStop = true;
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this.radioButtonFemale.Text = "radioButtonFemale";
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this.radioButtonFemale.UseVisualStyleBackColor = true;
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//
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// Form1
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//
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this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
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this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
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this.ClientSize = new System.Drawing.Size(561, 490);
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this.Controls.Add(this.groupBoxSex);
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this.Controls.Add(this.checkBoxProgrammer);
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this.Controls.Add(this.buttonHelp);
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this.Controls.Add(this.buttonOK);
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this.Controls.Add(this.label5);
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this.Controls.Add(this.label4);
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this.Controls.Add(this.textBoxOutput);
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this.Controls.Add(this.textBoxAge);
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this.Controls.Add(this.textBoxAddress);
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this.Controls.Add(this.textBoxName);
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this.Controls.Add(this.label2);
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this.Controls.Add(this.label1);
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this.Name = "Form1";
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this.Text = "Form1";
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this.Validating += new System.ComponentModel.CancelEventHandler(this.textBoxEmpty_Validating);
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this.groupBoxSex.ResumeLayout(false);
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this.groupBoxSex.PerformLayout();
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this.ResumeLayout(false);
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this.PerformLayout();
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220

}
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222

#endregion
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224

private System.Windows.Forms.Label label1;
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private System.Windows.Forms.Label label2;
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private System.Windows.Forms.TextBox textBoxName;
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private System.Windows.Forms.TextBox textBoxAddress;
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private System.Windows.Forms.TextBox textBoxAge;
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private System.Windows.Forms.TextBox textBoxOutput;
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private System.Windows.Forms.Label label4;
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private System.Windows.Forms.Label label5;
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private System.Windows.Forms.Button buttonOK;
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private System.Windows.Forms.Button buttonHelp;
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private System.Windows.Forms.CheckBox checkBoxProgrammer;
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private System.Windows.Forms.GroupBox groupBoxSex;
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private System.Windows.Forms.RadioButton radioButtonMale;
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private System.Windows.Forms.RadioButton radioButtonFemale;
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}
239

}
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241

Form1.cs

using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Data;
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using System.Drawing;
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using System.Text;
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using System.Windows.Forms;
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namespace WA_TextBoxTest
10

{
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public partial class Form1 : Form
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{
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public Form1()
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{
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InitializeComponent();
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this.buttonOK.Enabled = false;
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//Tag values for testing if the data is valid.
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this.textBoxName.Tag = false;
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this.textBoxAddress.Tag = false;
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this.textBoxAge.Tag = false;
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//订阅事件Subscriptions to events
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this.textBoxName.Validating += new CancelEventHandler(this.textBoxEmpty_Validating);
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this.textBoxAddress.Validating += new CancelEventHandler(this.textBoxEmpty_Validating);
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this.textBoxAge.Validating += new CancelEventHandler(this.textBoxEmpty_Validating);
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//当控件中文本发生改变，就激发TextChanged事件。
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this.textBoxName.TextChanged +=new EventHandler(textBox_TextChanged);
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this.textBoxAddress.TextChanged+=new EventHandler(textBox_TextChanged);
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this.textBoxAge.TextChanged += new EventHandler(textBox_TextChanged);
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}
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private void buttonOK_Click(object sender, EventArgs e)
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{
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//No testing for invalid values are made ,as that should not be necessary
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string output;
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//Concatenate the text values of for TextBoxes.
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output = "Name:" + this.textBoxName.Text + "\r\n";
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output += "Address:" + this.textBoxAddress.Text + "\r\n";
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output += "Occupation:" + (string)(this.checkBoxProgrammer.Checked ?
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"Programmer" : "Not a programmer") + "\r\n"; //此句等价于下面这句
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output += "Occupation:" + (string)(this.checkBoxProgrammer.Checked ?
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this.checkBoxProgrammer.Text : ("Not a "+this.checkBoxProgrammer.Text)) + "\r\n";
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output += "Sex:" + (string)(this.radioButtonFemale.Checked ?
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"Female" : "Male") + "\r\n"; //此句等价于下面这句
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output += "Sex:" + (string)(this.radioButtonFemale.Checked ?
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this.radioButtonFemale.Text : this.radioButtonMale.Text) + "\r\n";
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output += "Age:" + this.textBoxAge.Text;
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//Insert the new text.
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this.textBoxOutput.Text = output;
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}
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private void buttonHelp_Click(object sender, EventArgs e)
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{
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//Write a short description of each TextBox in the Output TextBox.
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string output;
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output = "Name=Your name\r\n";
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output += "Address=Your address\r\n";
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output += "Programmer=Check 'Programmer' if you are a programmer\r\n";
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output += "Sex=Choose your sex\r\n";
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output += "Age=Your age";
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//Insert the new text.
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this.textBoxOutput.Text = output;
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}
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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;
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//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