/// 学生按班级id选择班级.成功返回选课记录id 失败返回0
public long InsertCourseSelectionById(long userId, long classId)
{
try
{
//_userService.GetUserByUserId(userId);
ClassInfo classinfo = GetClassByClassId(classId);
//找到该班级所属课程下的所有班级
IList <ClassInfo> classList = ListClassByCourseId(classinfo.Course.Id);
foreach (ClassInfo c in classList)
{
if (_classDao.GetSelection(userId, c.Id) != 0)//学生已选同课程下其他班级
{
return(0);
}
}
CourseSelection coursesele = new CourseSelection();
UserInfo student = _userService.GetUserByUserId(userId);
coursesele.Student = student;
coursesele.ClassInfo = classinfo;
return(_classDao.InsertSelection(coursesele));
}
catch (UserNotFoundException eu) { throw eu; }
catch (ClassNotFoundException ec) { throw ec; }
}
/// 学生按班级id选择班级.成功返回选课记录id 失败返回0
public async Task <long> InsertCourseSelectionByIdAsync(long userId, long classId)
{
//_userService.GetUserByUserIdAsync(userId);
var classinfo = await GetClassByClassIdAsync(classId);
//找到该班级所属课程下的所有班级
var classList = await ListClassByCourseIdAsync(classinfo.Course.Id);
foreach (var c in classList)
{
if (_classDao.GetSelection(userId, c.Id) != 0) //学生已选同课程下其他班级
{
return(0);
}
}
var coursesele = new CourseSelection();
var student = await _userService.GetUserByUserIdAsync(userId);
coursesele.Student = student;
coursesele.ClassInfo = classinfo;
return(_classDao.InsertSelection(coursesele));
}