/// <summary>
        /// 知识点树
        /// </summary>
        /// <param name="courseId"></param>
        /// <returns></returns>
        public JsonResult GetKnowledgePointTree(int courseId)
        {
            List <dto_ZTree> list = B_QuesBase.GetKnowledgePointsTree(courseId);

            return(Json(list));
        }
        /// <summary>
        /// 目录树
        /// </summary>
        /// <param name="textbookId"></param>
        /// <returns></returns>
        public JsonResult GetCatalogTree(int textbookId)
        {
            List <dto_ZTree> list = B_QuesBase.GetCatalogsTree(textbookId);

            return(Json(list));
        }
        /// <summary>
        /// 教材版本列表
        /// </summary>
        /// <param name="courseId"></param>
        /// <returns></returns>
        public JsonResult GetTextBookVersions(int courseId)
        {
            List <T_TextBookVersions> list = B_QuesBase.GetTextBookVersions(courseId);

            return(Json(list));
        }
        /// <summary>
        /// 课本列表
        /// </summary>
        /// <param name="versionId"></param>
        /// <returns></returns>
        public JsonResult GetTextBooks(int versionId)
        {
            List <T_TextBooks> list = B_QuesBase.GetTextBooks(versionId);

            return(Json(list));
        }
 public JsonResult GetQuesTypes(int courseId)
 {
     return(Json(B_QuesBase.GetQuesTypes(courseId)));
 }