public IEnumerable <ValidationResult> Validate(ValidationContext validationContext)
{
List <ValidationResult> validationResults = new List <ValidationResult>();
// 檢查教學方式
if (!(IsBlackboard || IsBook || IsPPT || IsBuild || IsInteractive))
{
validationResults.Add(new ValidationResult("請選擇老師教學方式"));
}
// 檢查點名
if (RollCallFrequency == 0 && (ByInPerson || BySignInSheet || ByOnline || ByClasswork || ByTest))
{
validationResults.Add(new ValidationResult("老師不點名為什麼要選點名方式？"));
}
else if (RollCallFrequency > 0 && !(ByInPerson || BySignInSheet || ByOnline || ByClasswork || ByTest))
{
validationResults.Add(new ValidationResult("請選擇老師點名方式"));
}
// 檢查作業與考試
if (!(HaveClasswork || HaveTest || HaveMidtermExam || HaveFinalExam))
{
validationResults.Add(new ValidationResult("請選擇作業與考試"));
}
// 檢查備註說明長度
if (Remark.GetUTF8BytesCount() > 450)
{
validationResults.Add(new ValidationResult("備註長度限制為 450 半形字元以內，請縮短後再重新提交"));
}
// 檢查總評價
if (Grade <= 0)
{
validationResults.Add(new ValidationResult("老師至少值得一分吧？"));
}
else if (Grade >= 6)
{
validationResults.Add(new ValidationResult("最多五分不能再高囉！"));
}
return(validationResults);
}
