错误提示控件errorProvider演示例程

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

namespace ErrorTip
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
p rivate System.Windows.Forms.GroupBox groupBox1;
p rivate System.Windows.Forms.Label label1;
p rivate System.Windows.Forms.TextBox textBox1;
p rivate System.Windows.Forms.TextBox textBox2;
p rivate System.Windows.Forms.Label label2;
p rivate System.Windows.Forms.TextBox textBox3;
p rivate System.Windows.Forms.Label label3;
p rivate System.Windows.Forms.Label label4;
p rivate System.Windows.Forms.Button button1;
p rivate System.Windows.Forms.ErrorProvider errorProvider1;
/// <summary>
/// 必需的设计器变量。
/// </summary>
******* System.ComponentModel.Container components = null;

public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();

//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}

/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (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>
******* void InitializeComponent()
{
this.groupBox1 = new System.Windows.Forms.GroupBox();
this.textBox3 = new System.Windows.Forms.TextBox();
this.label3 = new System.Windows.Forms.Label();
this.textBox2 = new System.Windows.Forms.TextBox();
this.label2 = new System.Windows.Forms.Label();
this.textBox1 = new System.Windows.Forms.TextBox();
this.label1 = new System.Windows.Forms.Label();
this.label4 = new System.Windows.Forms.Label();
this.button1 = new System.Windows.Forms.Button();
this.errorProvider1 = new System.Windows.Forms.ErrorProvider();
this.groupBox1.SuspendLayout();
this.SuspendLayout();
//
// groupBox1
//
this.groupBox1.Controls.Add(this.textBox3);
this.groupBox1.Controls.Add(this.label3);
this.groupBox1.Controls.Add(this.textBox2);
this.groupBox1.Controls.Add(this.label2);
this.groupBox1.Controls.Add(this.textBox1);
this.groupBox1.Controls.Add(this.label1);
this.groupBox1.Location = new System.Drawing.Point(24, 24);
this.groupBox1.Name = "groupBox1";
this.groupBox1.Size = new System.Drawing.Size(280, 104);
this.groupBox1.TabIndex = 0;
this.groupBox1.TabStop = false;
this.groupBox1.Text = "用户注册信息";
//
// textBox3
//
this.textBox3.Location = new System.Drawing.Point(128, 72);
this.textBox3.Name = "textBox3";
this.textBox3.PasswordChar = '*';
this.textBox3.Size = new System.Drawing.Size(136, 21);
this.textBox3.TabIndex = 5;
this.textBox3.Text = "";
//
// label3
//
this.label3.Location = new System.Drawing.Point(16, 72);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(104, 16);
this.label3.TabIndex = 4;
this.label3.Text = "请确认用户密码：";
//
// textBox2
//
this.textBox2.Location = new System.Drawing.Point(128, 48);
this.textBox2.Name = "textBox2";
this.textBox2.PasswordChar = '*';
this.textBox2.Size = new System.Drawing.Size(136, 21);
this.textBox2.TabIndex = 3;
this.textBox2.Text = "";
//
// label2
//
this.label2.Location = new System.Drawing.Point(16, 48);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(104, 16);
this.label2.TabIndex = 2;
this.label2.Text = "请输入用户密码：";
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(128, 24);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(136, 21);
this.textBox1.TabIndex = 1;
this.textBox1.Text = "";
//
// label1
//
this.label1.Location = new System.Drawing.Point(16, 24);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(100, 16);
this.label1.TabIndex = 0;
this.label1.Text = "请输入用户名：";
//
// label4
//
this.label4.Location = new System.Drawing.Point(24, 136);
this.label4.Name = "label4";
this.label4.Size = new System.Drawing.Size(216, 16);
this.label4.TabIndex = 1;
this.label4.Text = "用户名和密码长度为6-12位字符或数字";
//
// button1
//
this.button1.Location = new System.Drawing.Point(240, 136);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(64, 23);
this.button1.TabIndex = 2;
this.button1.Text = "确认";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// errorProvider1
//
this.errorProvider1.ContainerControl = this;
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(328, 174);
this.Controls.Add(this.button1);
this.Controls.Add(this.label4);
this.Controls.Add(this.groupBox1);
this.MaximizeBox = false;
this.Name = "Form1";
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.Text = "演示使用错误提醒控件";
this.groupBox1.ResumeLayout(false);
this.ResumeLayout(false);

}
#endregion

/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}

p rivate void button1_Click(object sender, System.EventArgs e)
{//检验用户数据输入结果
if(this.textBox1.Text.Length>12||this.textBox1.Text.Length<6)
{
this.errorProvider1.SetError(this.textBox1,"用户名输入错误");
DialogResult ReturnDlg=MessageBox.Show(this,"用户名输入错误，是否从新输入？","信息提示",
MessageBoxButtons.RetryCancel,MessageBoxIcon.Question);
switch(ReturnDlg)
{
case DialogResult.Retry:
this.textBox1.Text="";
break;
case DialogResult.Cancel:
break;
}
}
if(this.textBox2.Text.Length>12||this.textBox2.Text.Length<6)
{
this.errorProvider1.SetError(this.textBox2,"用户密码输入错误");
DialogResult ReturnDlg=MessageBox.Show(this,"用户密码输入错误，是否从新输入？","信息提示",
MessageBoxButtons.RetryCancel,MessageBoxIcon.Question);
switch(ReturnDlg)
{
case DialogResult.Retry:
this.textBox2.Text="";
break;
case DialogResult.Cancel:
break;
}
}
if(!(this.textBox2.Text==this.textBox3.Text))
{
this.errorProvider1.SetError(this.textBox3,"用户密码两次输入不一致");
DialogResult ReturnDlg=MessageBox.Show(this,"用户密码两次输入不一致，是否从新输入？","信息提示",
MessageBoxButtons.RetryCancel,MessageBoxIcon.Question);
switch(ReturnDlg)
{
case DialogResult.Retry:
this.textBox3.Text="";
break;
case DialogResult.Cancel:
break;
}
}

}
}
}