private void DisplayColumnNameLists() { cboLevel1Codes.DataSource = geoCoder.GazetteerColumnHeaders(); cboLevel2Codes.DataSource = geoCoder.GazetteerColumnHeaders(); cboLevel3Codes.DataSource = geoCoder.GazetteerColumnHeaders(); cboLevel1Names.DataSource = geoCoder.GazetteerColumnHeaders(); cboLevel2Names.DataSource = geoCoder.GazetteerColumnHeaders(); cboLevel3Names.DataSource = geoCoder.GazetteerColumnHeaders(); //optional columns so display a blank row at the top IList <string> columnNames1 = geoCoder.GazetteerColumnHeaders(); columnNames1.Insert(0, string.Empty); cboLevel1AltNames.DataSource = columnNames1; IList <string> columnNames2 = geoCoder.GazetteerColumnHeaders(); columnNames2.Insert(0, string.Empty); cboLevel2AltNames.DataSource = columnNames2; IList <string> columnNames3 = geoCoder.GazetteerColumnHeaders(); columnNames3.Insert(0, string.Empty); cboLevel3AltNames.DataSource = columnNames3; SetDefaultNames(); }