public string SaveTeacher(Teacher teacher)
{
if (teacherGateway.FindDuplicatEmail(teacher.Email) == null)
{
if (teacherGateway.SaveTeacher(teacher) > 0)
{
return("Save Successfully.");
}
else
{
return("Sory! Save Fail.");
}
}
else
{
return(teacherGateway.FindDuplicatEmail(teacher.Email));
}
}