string str;
for(int i=0;i<checkedlistbox.CheckedItems.Count;i++)
{
sql+=checkedlistbox.CheckedItems[i].ToString()+",";
}
for(int i=0;i<checkedlistbox.CheckedItems.Count;i++)
{
sql+=checkedlistbox.CheckedItems[i].ToString()+",";
}
for(int i=0;i<checkedListBox1.SelectedIndices.Count;i++)
{
checkedListBox1.SelectedIndices[i]
}