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

namespace WindowsApplication5
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void btnOK_Click(object sender, EventArgs e)
{
string output;
output="Name:"+this.txtName.Text+"\r\n";
output += "Address:" + this.txtAddress.Text + "\r\n";
output += "Occupation:" + this.txtOccupation.Text + "\r\n";
output += "Age:" + this.txtAge.Text;
this.txtOutput.Text = output;
}
private void txtBoxEmpty_Validating(object sender, System.ComponentModel.CancelEventHandler e)
{
TextBox tb = (TextBox)sender;
if (tb.Text.Length == 0)
{
tb.BackColor = Color.Red;
tb.Tag = false;
}
else
{
tb.BackColor = System.Drawing.SystemColors.Window;
tb.Tag = true;
}
ValidateAll();
}
private void txtOccupation_Validating(object sender, System.ComponentModel.CancelEventArgs e)
{
TextBox tb = (TextBox)sender;
if (tb.Text.CompareTo("Programmer") == 0 || tb.Text.Length == 0)
{
tb.Tag = true;
tb.BackColor = System.Drawing.SystemColors.Window;
}
else
{
tb.Tag = false;
tb.BackColor = Color.Red;
}
ValidateAll();
}
private void txtAge_KeyPress(object sender, System.Windows.Forms.KeyPressEventHandler e)
{
if ((e.KeyChar < 48 || e.KeyChar > 57) && e.KeyChar != 8)
e.Handled = true;
}
private void txtBox_TextChanged(object sender, System.EventArgs e)
{
TextBox tb = (TextBox)sender;
if(tb.Text.Length==0&&tb!=txtOccupation)
{
tb.Tag=false;
tb.BackColor=Color.Red;
}
else if(tb==txtOccupation&&(tb.Text.Length!=0&&tb.Text.CompareTo("Programmer")!=0))
{
tb.Tag=true;
tb.BackColor=SystemColors.Window;
}
ValidateAll();
}
private void ValidateAll()
{
this.btnOK.Enabled = ((bool)(this.txtAddress.Tag) && (bool)(this.txtAge.Tag) && (bool)(this.txtName.Tag) && (bool)(this.txtOccupation.Tag));
}
private void btnHelp_Click(object sender, EventArgs e)
{
string output;
output = "Name=your name\r\n";
output += "Address=Your address\r\n";
output += "Occpation=Only allowed value is 'Programmer'\r\n";
output += "Ag=Your age";
this.txtOutput.Text = output;
}
}
}
----------------------------------------------------------------------------------------------------------------
错误 1 “System.Windows.Forms.KeyPressEventHandler”并不包含“KeyChar”的定义 C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\WindowsApplication5\WindowsApplication5\Form1.cs 58 20 WindowsApplication5
错误 2 “System.Windows.Forms.KeyPressEventHandler”并不包含“KeyChar”的定义 C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\WindowsApplication5\WindowsApplication5\Form1.cs 58 38 WindowsApplication5
错误 3 “System.Windows.Forms.KeyPressEventHandler”并不包含“KeyChar”的定义 C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\WindowsApplication5\WindowsApplication5\Form1.cs 58 57 WindowsApplication5
错误 4 “System.Windows.Forms.KeyPressEventHandler”并不包含“Handled”的定义 C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\WindowsApplication5\WindowsApplication5\Form1.cs 59 19 WindowsApplication5
错误 5 “txtBoxEmpty_Validating”的重载均与委托“System.ComponentModel.CancelEventHandler”不匹配 C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\WindowsApplication5\WindowsApplication5\Form1.Designer.cs 75 40 WindowsApplication5
错误 6 “txtBoxEmpty_Validating”的重载均与委托“System.ComponentModel.CancelEventHandler”不匹配 C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\WindowsApplication5\WindowsApplication5\Form1.Designer.cs 87 43 WindowsApplication5
错误 7 “txtAge_KeyPress”的重载均与委托“System.Windows.Forms.KeyPressEventHandler”不匹配 C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\WindowsApplication5\WindowsApplication5\Form1.Designer.cs 107 37 WindowsApplication5
错误 8 “txtBoxEmpty_Validating”的重载均与委托“System.ComponentModel.CancelEventHandler”不匹配 C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\WindowsApplication5\WindowsApplication5\Form1.Designer.cs 108 39 WindowsApplication5
-------------------------------------------------------------------------------------------------------------------------------------------------
namespace WindowsApplication5
{
partial class Form1
{
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.IContainer components = null;

/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}

#region Windows 窗体设计器生成的代码

/// <summary>
/// 设计器支持所需的方法 - 不要
/// 使用代码编辑器修改此方法的内容。
/// </summary>
private void InitializeComponent()

{
this.btnOK = new System.Windows.Forms.Button();
this.btnHelp = new System.Windows.Forms.Button();
this.txtName = new System.Windows.Forms.TextBox();
this.txtAddress = new System.Windows.Forms.TextBox();
this.txtOccupation = new System.Windows.Forms.TextBox();
this.txtAge = new System.Windows.Forms.TextBox();
this.txtOutput = new System.Windows.Forms.TextBox();
this.lblName = new System.Windows.Forms.Label();
this.lblAddress = new System.Windows.Forms.Label();
this.lblAge = new System.Windows.Forms.Label();
this.lblOccupation = new System.Windows.Forms.Label();
this.lblOutput = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// btnOK
//
this.btnOK.Enabled = false;
this.btnOK.Location = new System.Drawing.Point(332, 12);
this.btnOK.Name = "btnOK";
this.btnOK.Size = new System.Drawing.Size(75, 23);
this.btnOK.TabIndex = 0;
this.btnOK.Text = "OK";
this.btnOK.UseVisualStyleBackColor = true;
this.btnOK.Click += new System.EventHandler(this.btnOK_Click);
//
// btnHelp
//
this.btnHelp.Location = new System.Drawing.Point(332, 54);
this.btnHelp.Name = "btnHelp";
this.btnHelp.Size = new System.Drawing.Size(75, 23);
this.btnHelp.TabIndex = 1;
this.btnHelp.Text = "Help";
this.btnHelp.UseVisualStyleBackColor = true;
this.btnHelp.Click += new System.EventHandler(this.btnHelp_Click);
this.btnHelp.CausesValidationChanged += new System.EventHandler(this.btnHelp_Click);
//
// txtName
//
this.txtName.Location = new System.Drawing.Point(112, 12);
this.txtName.Name = "txtName";
this.txtName.Size = new System.Drawing.Size(196, 21);
this.txtName.TabIndex = 2;
this.txtName.Tag = false;
this.txtName.Validating += new System.ComponentModel.CancelEventHandler(this.txtBoxEmpty_Validating);
this.txtName.TextChanged += new System.EventHandler(this.txtBox_TextChanged);
//
// txtAddress
//
this.txtAddress.Location = new System.Drawing.Point(112, 32);
this.txtAddress.Multiline = true;
this.txtAddress.Name = "txtAddress";
this.txtAddress.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
this.txtAddress.Size = new System.Drawing.Size(196, 103);
this.txtAddress.TabIndex = 3;
this.txtAddress.Tag = false;
this.txtAddress.Validating += new System.ComponentModel.CancelEventHandler(this.txtBoxEmpty_Validating);
this.txtAddress.TextChanged += new System.EventHandler(this.txtBox_TextChanged);
//
// txtOccupation
//
this.txtOccupation.Location = new System.Drawing.Point(112, 133);
this.txtOccupation.Name = "txtOccupation";
this.txtOccupation.Size = new System.Drawing.Size(196, 21);
this.txtOccupation.TabIndex = 4;
this.txtOccupation.Tag = false;
this.txtOccupation.Validating += new System.ComponentModel.CancelEventHandler(this.txtOccupation_Validating);
this.txtOccupation.TextChanged += new System.EventHandler(this.txtBox_TextChanged);
//
// txtAge
//
this.txtAge.Location = new System.Drawing.Point(112, 153);
this.txtAge.Name = "txtAge";
this.txtAge.Size = new System.Drawing.Size(196, 21);
this.txtAge.TabIndex = 5;
this.txtAge.Tag = false;
this.txtAge.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.txtAge_KeyPress);
this.txtAge.Validating += new System.ComponentModel.CancelEventHandler(this.txtBoxEmpty_Validating);
this.txtAge.TextChanged += new System.EventHandler(this.txtBox_TextChanged);
//
// txtOutput
//
this.txtOutput.Location = new System.Drawing.Point(112, 173);
this.txtOutput.Multiline = true;
this.txtOutput.Name = "txtOutput";
this.txtOutput.ReadOnly = true;
this.txtOutput.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
this.txtOutput.Size = new System.Drawing.Size(196, 137);
this.txtOutput.TabIndex = 6;
//
// lblName
//
this.lblName.AutoSize = true;
this.lblName.Location = new System.Drawing.Point(6, 12);
this.lblName.Name = "lblName";
this.lblName.Size = new System.Drawing.Size(29, 12);
this.lblName.TabIndex = 7;
this.lblName.Text = "Name";
//
// lblAddress
//
this.lblAddress.AutoSize = true;
this.lblAddress.Location = new System.Drawing.Point(6, 32);
this.lblAddress.Name = "lblAddress";
this.lblAddress.Size = new System.Drawing.Size(47, 12);
this.lblAddress.TabIndex = 8;
this.lblAddress.Text = "Address";
//
// lblAge
//
this.lblAge.AutoSize = true;
this.lblAge.Location = new System.Drawing.Point(6, 123);
this.lblAge.Name = "lblAge";
this.lblAge.Size = new System.Drawing.Size(23, 12);
this.lblAge.TabIndex = 9;
this.lblAge.Text = "Age";
//
// lblOccupation
//
this.lblOccupation.AutoSize = true;
this.lblOccupation.Location = new System.Drawing.Point(6, 153);
this.lblOccupation.Name = "lblOccupation";
this.lblOccupation.Size = new System.Drawing.Size(65, 12);
this.lblOccupation.TabIndex = 10;
this.lblOccupation.Text = "Occupation";
//
// lblOutput
//
this.lblOutput.AutoSize = true;
this.lblOutput.Location = new System.Drawing.Point(6, 173);
this.lblOutput.Name = "lblOutput";
this.lblOutput.Size = new System.Drawing.Size(41, 12);
this.lblOutput.TabIndex = 11;
this.lblOutput.Text = "Output";
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(417, 331);
this.Controls.Add(this.lblOutput);
this.Controls.Add(this.lblOccupation);
this.Controls.Add(this.lblAge);
this.Controls.Add(this.lblAddress);
this.Controls.Add(this.lblName);
this.Controls.Add(this.txtOutput);
this.Controls.Add(this.txtAge);
this.Controls.Add(this.txtOccupation);
this.Controls.Add(this.txtAddress);
this.Controls.Add(this.txtName);
this.Controls.Add(this.btnHelp);
this.Controls.Add(this.btnOK);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
this.PerformLayout();

}

#endregion

private System.Windows.Forms.Button btnOK;
private System.Windows.Forms.Button btnHelp;
private System.Windows.Forms.TextBox txtName;
private System.Windows.Forms.TextBox txtAddress;
private System.Windows.Forms.TextBox txtOccupation;
private System.Windows.Forms.TextBox txtAge;
private System.Windows.Forms.TextBox txtOutput;
private System.Windows.Forms.Label lblName;
private System.Windows.Forms.Label lblAddress;
private System.Windows.Forms.Label lblAge;
private System.Windows.Forms.Label lblOccupation;
private System.Windows.Forms.Label lblOutput;
}
}