checkedlist box - windows application C#

Say your strAlldata with comma separater having all the values and chkKiosks is the id for checkbox. Now  split the comma separated string and put it in array.
loop through all the array element and put it into checkbox. I have used blnfound
based on requirement you can check or uncheck the checkBox.

Array arrCheckedKiosk;
arrKioskName = strAlldata.Split(',');

bool blnFound;
blnFound = false;

if (arrKioskName != null)
{
  foreach (object obj in arrKioskName)
  {
      chkKiosks.Items.Add(obj.ToString(), blnFound);

  }
}

You can get the itemIndex like below.

for (int i = 0; i < chkKiosks.Length; i++)
 {
   string x = chkKiosks.GetValue(i).ToString()
 }