CheckedListBox 使用 - asp.net 教程-

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

namespace CheckedListBoxExample

{

    public partial class FormCheckedListBox : Form

    {

        public FormCheckedListBox()

        {

            InitializeComponent();

        }

        private void buttonOK_Click(object sender, EventArgs e)

        {

            string mystr = "您所选择的课程是：";

            // checkedListBox1.CheckedItems.Count是用户选择项目的个数

            int checkedNumber = checkedListBox1.CheckedItems.Count;

            if (checkedNumber == 0)

            {

                MessageBox.Show("您还没有选择任何课程！");

            }

            else

            {

                for (int i = 0; i < checkedNumber; i++)

                {

                    // checkedListBox1.CheckedItems[i]是用户选中项集合中的第i项

                    mystr += checkedListBox1.CheckedItems[i] + " ; ";

                }

                //如果尾部有分号，则将尾部的分号变为叹号

                if (mystr[mystr.Length - 2] == ';')

                {

                    mystr = mystr.Substring(0, mystr.Length - 2);

                    mystr += "!";

                }

                MessageBox.Show(mystr);

            }

        }

        private void buttonReference_Click(object sender, EventArgs e)

        {

            //取消已经选中的项

            for (int i = 0; i < checkedListBox1.Items.Count; i++)

            {

                checkedListBox1.SetItemChecked(i, false);

                checkedListBox1.SetSelected(i, false);

            }

            //自动添加建议选中的项

            checkedListBox1.SetItemChecked(0, true);

            checkedListBox1.SetItemChecked(3, true);

            checkedListBox1.SetItemChecked(7, true);

        }

    }

}