Well i knew about that part, but left it on you.
Here is the complete solution,
//Terms used in the code
name_dropdown= dropdown of the names
operator_dropdown=dropdown of the operators
kv=Key-Value pair Dictionary data structure. Having key=names and value=operators
noValue=default string value when given name is not found
//Code for spliting the operator and binding them in operator_dropdown on selection
of a value in name_dropdown
public void name_dropdown_SelectedIndexChange(object sender, EventArgs e)
{
String selected_name=name_dropdown.Text;
it here
String noValue="noValue";
String operator_string=kv.TryGetValue(selected_name, out noValue);
String[] operators=operator_string.split(',');
operator_dropdown.Enabled=true;
operator_dropdown.DataSource=operators;
}
All the operators associated with the name in xml would be added in the dropdown.