public void BlockSelection(int index)
{
RoomProperty.BlockVisible = !RoomProperty.BlockVisible;//true
// display entry selected text value
RoomProperty.BlockName = BlockModelList[index].name;
RoomData.blockId = BlockModelList[index].id;
RoomData.floorId = "";
RoomProperty.FloorName = "";
OnPropertyChanged("RoomProperty");
web.GetAllFloor(RoomData.hostelId);
}