多列选择框控件checkedListBox演示程序

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

namespace ListCheckBox
{
 /// <summary>
 /// Form1 的摘要说明。
 /// </summary>
 public class Form1 : System.Windows.Forms.Form
    {
  p rivate System.Windows.Forms.Label label1;
  p rivate System.Windows.Forms.Button button1;
  p rivate System.Windows.Forms.Button button2;
        ******* CheckedListBox checkedListBox1;
  /// <summary>
  /// 必需的设计器变量。
  /// </summary>
  p rivate 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>
  p rivate void InitializeComponent()
  {
            this.label1 = new System.Windows.Forms.Label();
            this.button1 = new System.Windows.Forms.Button();
            this.button2 = new System.Windows.Forms.Button();
            this.checkedListBox1 = new System.Windows.Forms.CheckedListBox();
            this.SuspendLayout();
            //
            // label1
            //
            this.label1.Location = new System.Drawing.Point(8, 8);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(216, 16);
            this.label1.TabIndex = 1;
            this.label1.Text = "选择西部大开发省、直辖市、自治区";
            //
            // button1
            //
            this.button1.Location = new System.Drawing.Point(48, 128);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(96, 23);
            this.button1.TabIndex = 2;
            this.button1.Text = "显示选择结果";
            this.button1.Click += new System.EventHandler(this.button1_Click);
            //
            // button2
            //
            this.button2.Location = new System.Drawing.Point(184, 128);
            this.button2.Name = "button2";
            this.button2.Size = new System.Drawing.Size(96, 23);
            this.button2.TabIndex = 3;
            this.button2.Text = "关闭应用程序";
            this.button2.Click += new System.EventHandler(this.button2_Click);
            //
            // checkedListBox1
            //
            this.checkedListBox1.CheckOnClick = true;
            this.checkedListBox1.Items.AddRange(new object[] {
            "重庆市",
            "四川省",
            "贵州省",
            "云南省",
            "广西壮族自治区",
            "西自治区",
            "新维吾尔族自治区",
            "内蒙古自治区",
            "宁夏回族自治区",
            "陕西省",
            "甘肃省"});
            this.checkedListBox1.Location = new System.Drawing.Point(8, 24);
            this.checkedListBox1.MultiColumn = true;
            this.checkedListBox1.Name = "checkedListBox1";
            this.checkedListBox1.Size = new System.Drawing.Size(312, 100);
            this.checkedListBox1.TabIndex = 0;
            //
            // Form1
            //
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(332, 158);
            this.Controls.Add(this.button2);
            this.Controls.Add(this.button1);
            this.Controls.Add(this.label1);
            this.Controls.Add(this.checkedListBox1);
            this.Location = new System.Drawing.Point(1800, 300);
            this.MaximizeBox = false;
            this.Name = "Form1";
            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
            this.Text = "演示多选列表框控件";
            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 button2_Click(object sender, System.EventArgs e)
  {
   this.Close();
  }

  p rivate void button1_Click(object sender, System.EventArgs e)
  {
   string str="选择结果：";
   for(int i=0;i<this.checkedListBox1.CheckedItems.Count;i++)
   {
    str+=this.checkedListBox1.CheckedItems[i]+"、";
   }
   if(str[str.Length-1]=='、')
   {
    str=str.Substring(0,str.Length-1);
   }
   MessageBox.Show(this,str,"选择结果",MessageBoxButtons.OK,MessageBoxIcon.Information);
  }

 }
}