I have 2 RadComboBox.
The first One Is enabled on Page load and shows States, with Checkboxes=true.
Here the user can select one or more States.
The second RadComboBox Is not enabled by default, and became enabled when the user select at least one state in the first combobox.
This combobox should display cities of the states selected in the first combobox.
What Is the best approach (better with examples) to implement this?