如何确定checkedListBox中没有项被选中？

Question

我在ItemCheck事件中是这么写得
        private void checkedListBox1_ItemCheck(object sender, ItemCheckEventArgs e)
        {
            CheckedListBox clb = (CheckedListBox)sender;
            for (int x = 0; x != checkedListBox1.CheckedItems.Count ; x++)
            {
                if (x != 0)
                {
                    clb.Tag = true;
                }
                else
                {
                    clb.Tag = false;
                }
            }
ValidateOK();
但是经过试验，必须选中三个以上的项目才能验证，到底是怎么回事呀

Answer 1

private   void   checkedListBox1_ItemCheck(object   sender,   System.Windows.Forms.ItemCheckEventArgs   e) 
{ 
if(e.NewValue==CheckState.Checked) 
{}
}string s=String.Empty;
for (i = 0; i <=checkedListBox1.Items.Count-1; i++)
{
  if(checkedListBox1.GetItemChecked(i))
  {
  s = checkedListBox1.Items[i].Value+",";
  }
}
foreach(object item in checkedListBox1.Items) {
  }

Answer 2

for (int i = 0; i < checkedListBox1.Items.Count; i++)
            {
                if (checkedListBox1.GetItemChecked(i))
                {
                    BaseParser cli = null;
                    switch (checkedListBox1.GetItemText(checkedListBox1.Items[i]))
                    {
                        case "ssw":
                            cli = new Soso();
                            bplist.Add(cli);
                            break;
                        case "ww":
                            cli = new Wenwen();
                            bplist.Add(cli);
                            break;
                        case "ss":
                            cli = new SosoBlog();
                            bplist.Add(cli);
                            break;
                        case "sa":
                            cli = new Sogou();
                            bplist.Add(cli);
                            break;
                        case "a":
                            cli = new _1688();
                            bplist.Add(cli);
                            break;
                        case "q":
                            cli = new Xywy();
                            bplist.Add(cli);
                            break;
                        default:
                            break;
                    }
                }
            }

Answer 3

不知道楼主是不是这个意思！
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();            //add 3 items to collection checkedListBox
            //and make sure one item is chosen,
            checkedListBox1.Items.Add("KDS",true);
            checkedListBox1.Items.Add("2");
            checkedListBox1.Items.Add("3");            //listChecked就是处于选中状态的所有item集合
            CheckedListBox.CheckedItemCollection listChecked = checkedListBox1.CheckedItems;
            
            for (int i = 0; i < listChecked.Count; i++)
            {
                //将被选中item的text打印出来
                MessageBox.Show("{0}", listChecked[0].ToString());            }
        }
    }}

Answer 4

如果楼主要确定没有项被选中只需要检查listChecked.Count是否为0即可。为0，则没有项被选中了。

Answer 5

我确实是检查checkedListBox1.CheckedItems.Count的值是否为空了，请看代码，但是就是不能确定checkedListBox中的项是否全部没有选中。