/// <summary> /// 课程中心-课程详情-后台预览 /// </summary> /// <param name="id">课程Id</param> /// <returns></returns> public ActionResult PreviewCourse(int id = 0) { CourseBll bll = new CourseBll(); int studentId = GetCurrentUser().StudentId; DtoSelectCenterCourseDetailResult course = bll.GetCourseDetailForPreview(id, studentId); CourseDetailViewModel model = course.ConvertTo <CourseDetailViewModel>(); model.StudentId = studentId; if (string.IsNullOrEmpty(model.CourseImage)) { model.CourseImage = defaultCourseImg; } return(View(model)); }