private static TCInstructRecordEditor SetTeacher(CourseRecord course, TeacherRecord teacher, string sequence)
{
TCInstructRecord tcrecord;
if (sequence == "1")
{
tcrecord = course.GetFirstInstruct();
}
else if (sequence == "2")
{
tcrecord = course.GetSecondInstruct();
}
else
{
tcrecord = course.GetThirdInstruct();
}
if (tcrecord != null && teacher != null)
{
return(new TCInstructRecordEditor(tcrecord, teacher)); //改變教師
}
else if (tcrecord != null && teacher == null)
{
return(new TCInstructRecordEditor(tcrecord)); //刪除記錄。
}
else if (tcrecord == null && teacher == null)
{
return(new TCInstructRecordEditor()); //什麼都不作。
}
else
{
return(new TCInstructRecordEditor(course, teacher, sequence)); //新增記錄。
}
}
/// <summary>
/// 取得課程的第三位授課教師。
/// </summary>
public static TeacherRecord GetThirdTeacher(this CourseRecord course)
{
if (course != null)
{
TCInstructRecord tc = course.GetThirdInstruct();
if (tc != null)
{
return(tc.Teacher);
}
}
return(null);
}