public string SaveAllocation(AllocateClassroom aClassroom)
{
if (aClassRoomGateway.IsSameCourseRoomDayExist(aClassroom.FromTime, aClassroom.ToTime, aClassroom.DayId, aClassroom.RoomId) != null)
{
return("allocation not unique");
}
if (aClassRoomGateway.SaveAllocation(aClassroom) > 0)
{
return("yes");
}
else
{
return("no");
}
}