另外绑定的字段也要更改
case "1":
GeocodeFindResults.DisplayMemberPath = "Name";
break;
case "2":
GeocodeFindResults.DisplayMemberPath = "CallSign";
break;
case "3":
GeocodeFindResults.DisplayMemberPath = "UserID";
break;
case "4":
GeocodeFindResults.DisplayMemberPath = "Num";
break;