public async Task <Boolean> DeleteGrade(string login, string password, int id)
{
bool success;
HandbookGradeService handbookGradeService = new HandbookGradeService();
success = await handbookGradeService.Delete(login, password, id);
return(success);
}
public async Task AddGrade(string login, string password, HandbookGrade handbookGrade)
{
HandbookGradeService handbookGradeService = new HandbookGradeService();
await handbookGradeService.Add(login, password, handbookGrade);
}
public async Task GetGrades(string login, string password)
{
HandbookGradeService handbookGradeService = new HandbookGradeService();
handbookGrades = await handbookGradeService.Get(login, password);
}