C# CheckedListBox控件用法

1.添加项

checkedListBox1.Items.Add("蓝色");

checkedListBox1.Items.Add("红色");

2. 判断第i项是否选中

if（checkedListBox1.GetItemChecked(i)）

{

    return true;

}

else

{

    return false;

}

 

3. 设置第i项是否选中

checkedListBox1.SetItemChecked(i,true);  //选中

checkedListBox1.SetItemChecked(i,false); //未选中

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 voidselect_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 voidcheckBoxAll_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 voidchkl_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

{  

  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);      

}