public void DeleteCourseByCourseId(long courseId)
{
try
{
if (courseId < 0)
{
throw new ArgumentException();
}
//删除course下的class
_iClassService.DeleteClassByCourseId(courseId);
//删除course下的seminar
_iSeminarService.DeleteSeminarByCourseId(courseId);
//删除course
_iCourseDao.DeleteCourseByCourseId(courseId);
}
catch (ClassNotFoundException)
{
//删除course下的seminar
_iSeminarService.DeleteSeminarByCourseId(courseId);
//删除course
_iCourseDao.DeleteCourseByCourseId(courseId);;
}
catch (CourseNotFoundException cre)
{
throw cre;
}
}
/// <summary>
/// 按courseId删除课程.
/// @author ZhouZhongjun
/// </summary>
/// <param name="courseId">课程Id</param>
/// <seealso cref="M:Xmu.Crms.Shared.Service.ISeminarService.DeleteSeminarByCourseId(System.Int64)"/>
/// <seealso cref="M:Xmu.Crms.Shared.Service.IClassService.DeleteClassByCourseId(System.Int64)"/>
/// <exception cref="T:System.ArgumentException">courseId格式错误时抛出</exception>
/// <exception cref="T:Xmu.Crms.Shared.Exceptions.CourseNotFoundException">未找到课程</exception>
public void DeleteCourseByCourseId(long courseId)
{
if (courseId <= 0)
{
throw new ArgumentException("格式错误！");
}
var course = _db.Course.Where(c => c.Id == courseId).SingleOrDefault();
if (course == null)
{
throw new CourseNotFoundException();
}
//删除course下的所有班级
_classService.DeleteClassByCourseId(courseId);
//删除course下的所有Seminar
_seminarService.DeleteSeminarByCourseId(courseId);
//删除course下的所有课程
_db.Course.Remove(course);
_db.SaveChanges();
}