/// <summary>
        /// 学生完成课时学习后,创建课后任务
        /// </summary>
        public Yw_StudentTask CreateTaskAutoAfterStudy(int studentId, int lesProgressId)
        {
            StudentStudyBll          studyBll    = new StudentStudyBll();
            Yw_StudentLessonProgress lesProgress = studyBll.GetStuLessonProgressById(lesProgressId);

            if (lesProgress.Yle_Percent < 100 && lesProgress.Yle_SubjectCount > 0)//学生课时学习中,如果题目全部作对,就不创建课后任务
            {
                Yw_StudentCourseProgress progress = studyBll.GetProgressByStudentCourse(studentId, lesProgress.Yle_CourseId);
                return(CreateStudyPractice(progress, studentId, lesProgress.Yle_LessonId, lesProgress.Yle_LessonIndex, lesProgressId, null, StudyTaskTypeEnum.系统课后任务));
            }
            return(null);
        }