/// <summary>
/// 將資料變成只有學年度學期，年級統一為0。
/// </summary>
/// <param name="semesters"></param>
/// <returns></returns>
public static SemesterDataCollection ToSemesterOnly(this SemesterDataCollection semesters)
{
SemesterDataCollection result = new SemesterDataCollection();
foreach (SemesterData sd in semesters)
{
result.Add(new SemesterData(0, sd.SchoolYear, sd.Semester));
}
return(result);
}
/// <summary>
/// 取得按年級學期排序、去除重讀學期後指定的學期資訊，例：1,2,3,4，取得1,2年級的資訊，例：1,2,3,4,5，取得1,2年級與3上的資訊。
/// </summary>
/// <param name="semester"></param>
/// <returns></returns>
public SemesterDataCollection GetSemesters(List <int> semesters)
{
SemesterDataCollection origin = GetGradeYearSemester();
SemesterDataCollection result = new SemesterDataCollection();
foreach (SemesterData semester in origin)
{
if (semester.GradeYear == 1 && semester.Semester == 1)
{
if (semesters.Contains(1))
{
result.Add(semester);
}
}
else if (semester.GradeYear == 1 && semester.Semester == 2)
{
if (semesters.Contains(2))
{
result.Add(semester);
}
}
else if (semester.GradeYear == 2 && semester.Semester == 1)
{
if (semesters.Contains(3))
{
result.Add(semester);
}
}
else if (semester.GradeYear == 2 && semester.Semester == 2)
{
if (semesters.Contains(4))
{
result.Add(semester);
}
}
else if (semester.GradeYear == 3 && semester.Semester == 1)
{
if (semesters.Contains(5))
{
result.Add(semester);
}
}
else if (semester.GradeYear == 3 && semester.Semester == 2)
{
if (semesters.Contains(6))
{
result.Add(semester);
}
}
else if (semester.GradeYear == 7 && semester.Semester == 1)
{
if (semesters.Contains(1))
{
result.Add(semester);
}
}
else if (semester.GradeYear == 7 && semester.Semester == 2)
{
if (semesters.Contains(2))
{
result.Add(semester);
}
}
else if (semester.GradeYear == 8 && semester.Semester == 1)
{
if (semesters.Contains(3))
{
result.Add(semester);
}
}
else if (semester.GradeYear == 8 && semester.Semester == 2)
{
if (semesters.Contains(4))
{
result.Add(semester);
}
}
else if (semester.GradeYear == 9 && semester.Semester == 1)
{
if (semesters.Contains(5))
{
result.Add(semester);
}
}
else if (semester.GradeYear == 9 && semester.Semester == 2)
{
if (semesters.Contains(6))
{
result.Add(semester);
}
}
}
return(result);
}