CheckedListBox控件的用法

 

1.添加项

checkedListBox1.Items.Add("蓝色");

checkedListBox1.Items.Add("红色");

checkedListBox1.Items.Add("黄色"); 

       添加Display和Value项目

       public class CheckedListBoxItem

    {

        public string Display { get; set; }

        public string Value { get; set; }

    }

      checkedListBox1.Items.Add(new CheckedListBoxItem{Display="",Value=""});

     checkedListBox1splayMember = "Display";

     checkedListBox1lueMember = "Value"; 

 

2. 判断第i项是否选中,选中为true,否则为false

if（checkedListBox1.GetItemChecked(i)）

{

     return true;

}

else

{

     return false;

}

 

3. 设置第i项是否选中

checkedListBox1.SetItemChecked(i, true);  //true改为false为没有选中。 

4. 设置全选

添加一个名为select_all的checkbox控件，由其控制checkedListBox是全选还是全不选。

private void select_all_CheckedChanged(object sender, EventArgs e)

{

     if(select_all.Checked)

{

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

               checkedListBox1.SetItemChecked(j, true);

}

else

{

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

      checkedListBox1.SetItemChecked(j, false);

}

}

 

5.得到全部选中的值 ，并将选中的项的文本组合成为一个字符串。

 string strCollected = string.Empty;

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

 {

      if (checkedListBox1.GetItemChecked(i))

      {

          if (strCollected == string.Empty)

          {

               strCollected = checkedListBox1.GetItemText(

checkedListBox1.Items[i]);

          }

          else

          {

               strCollected = strCollected + "/" + checkedListBox1.

GetItemText(checkedListBox1.Items[i]);

           }

       }

}

 

 

6.设置CheckedListBox中第i项的Checked状态

checkedListBox1.SetItemCheckState(i, CheckState.Checked); 

 

7.

private void checkBoxAll_CheckedChanged(object sender, EventArgs e)

{

     if (checkBoxAll.Checked)

     {

         //被选择了则将CheckedListBox中的所有条目都变为Checked状态

         for (int i = 0; i < checkedListBoxLayerControl.Items.Count;

                   i++)

         {    

checkedListBoxLayerControl.SetItemCheckState(i,

        CheckState.Checked);

}

}

else

{

     //否则变成Unchecked状态

    for (int i = 0;

 i < checkedListBoxLayerControl.Items.Count; i++)

{

checkedListBoxLayerControl.SetItemCheckState(i, CheckState.Unchecked); 

}             

}

}

8. checkedListBox 单选设置(代码实现)

private void chkl_ItemAuditing_ItemCheck(object sender,   

ItemCheckEventArgs e)

{

     if (chkl_ItemAuditing.CheckedItems.Count > 0)

    {

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

         {

if (i != e.Index)

{

this.chkl_ItemAuditing.SetItemCheckState(i,

System.Windows.Forms.CheckState.Unchecked);

}

}

}

}

9. checkedListBox1显示一个数据库中关键字对应的所有记录

for (int i = 0; i < table.Rows.Count; i++)

{

    string name = table.Rows["myname"].ToString();

    string paw = table.Rows["mypaw"].ToString();

    checkedListBox1.Items.Add(name + paw);

}

 

10.

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

{  

   if(CheckedListBox.GetItemText(

CheckedListBox.Items)=="你得到的值")  

{  

      CheckedListBox.SetItemChecked(i,true);  

}  

}

 

11. 清除checkedListBox1中所有的选项

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

{

    checkedListBox1.Items.Clear();

}

12. //设置索引为index的项为选中状态

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

{

    checkedListBox1.SetItemChecked(i, true);

} 

 

13.  

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

{

if (checkedListBox1.GetSelected(i))

{

MessageBox.Show(checkedListBox1.CheckedItems.ToString());

}

}

 

14.//选中checkedListBox1所有的选项

 

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

{

checkedListBox1.SetItemCheckState(i, CheckState.Checked);

}

 

15.            

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

{ 

//如果checkedListBox1的第i项被选中，

//则显示checkedListBox1对应的值

if (checkedListBox1.GetItemChecked(i))

{

     MessageBox.Show(checkedListBox1.Items.ToString());

}

}

 

16. //反向选择checkedListBox1的选项

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

{

    if (checkedListBox1.GetItemChecked(i))

   {

       checkedListBox1.SetItemChecked(i, false);

   }

   else

   {

       checkedListBox1.SetItemChecked(i, true);

   }

}

17. //checkedListBox1中选定的项->checkedListBox2

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

{

     checkedListBox2.Items.Add(this.checkedListBox1.CheckedItems);

 

//remove是除去一个具体的值，不是index，注意了

     this.checkedListBox1.Items.Remove(

         this.checkedListBox1.CheckedItems);      

}