for (int i = 0; i < checkedListBox1.Items.Count; i++)
{
  if (checkedListBox1.GetItemChecked(i))
  {
    MessageBox.Show(checkedListBox1.GetItemText(checkedListBox1.Items[i]));
  }
}

checkedListBox1.Items.Add(“蓝色“); 
checkedListBox1.Items.Add(“红色“); 
checkedListBox1.Items.Add(“黄色“);

if（checkedListBox1.GetItemChecked(i)）
{
   return true;
} 
else
{
   return false; 
}

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

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);
}
}

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]);
      }
    }
}

checkedListBox1.SetItemCheckState(i, CheckState.Checked);

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); 
}       
}
}

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); 
     } 
  } 
} 
}

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); 
}
 

for(i=0;i<CheckedListBox.Items.Count;i++)  
{  
  if(CheckedListBox.GetItemText(
CheckedListBox.Items)==“你得到的值“)  
{  
   CheckedListBox.SetItemChecked(i,true);  
}  
}

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

//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);
} 

for (int i = 0; i < checkedListBox1.Items.Count; i++) 
{
     if (checkedListBox1.GetSelected(i)) 
     {
          MessageBox.Show(checkedListBox1.CheckedItems.ToString());
     }
}

//选中checkedListBox1所有的选项
 
for (int i = 0; i < checkedListBox1.Items.Count; i++)     
{
     checkedListBox1.SetItemCheckState(i, CheckState.Checked);
}

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(
)); 
     }
}

//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); 
  } 
}

//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);