private void DisplayLevel3List()
{
if (string.IsNullOrEmpty(Level3Original()))
{
// display an empty list
cboLevel3Manual.DataSource = null;
}
else
{
// display list based on selected level 1 and 2
string level1 = SelectedValue(cboLevel1Manual);
string level2 = SelectedValue(cboLevel2Manual);
if (level2 == null)
{
// display an empty list
cboLevel3Manual.DataSource = null;
}
else
{
var list = geoCoder.Level3GazetteerNames(
level1,
level2);
// format - add a leave blank option to the bottom of the list
list.Add(LeaveBlankText);
cboLevel3Manual.DataSource = list;
}
}
}