public string Save(CourseAssignToTeacher courseAssign)
{
if (courseAssignToTeacherGateway.IsSubjectAssigned(courseAssign))
{
return("This Course already Assigned");
}
else
{
float Credit = Convert.ToSingle(courseGateway.GetCourseId(courseAssign.CourseCode).Credit);
float AvailableCredit = Convert.ToSingle(teacherGateway.GetAvailableCreditByTeacherId(courseAssign.TeacherId).RemainingCredit);
float RemainingCredit = (AvailableCredit - Credit);
if (RemainingCredit > 0)
{
int rowAffect = teacherGateway.UpdateTeacher(courseAssign.TeacherId, RemainingCredit);
if (rowAffect > 0)
{
int affect = courseAssignToTeacherGateway.Save(courseAssign);
if (affect > 0)
{
return("Save Successfull");
}
else
{
return("Failed");
}
}
else
{
return("Failed");
}
}
else
{
return("Not Enough Credit Left");
}
}
}