protected void Note_Info() { string stuId = Session["userId"].ToString(); string sql = "select * from NoteInfo inner join VideoInfo on NoteInfo.videoId = VideoInfo.videoId inner join CourseInfo on CourseInfo.courseId = VideoInfo.CourseId where stuId='" + stuId + "'"; NoteInfo.DataSource = DataOperate.GetDataset(sql, "NoteInfo"); NoteInfo.DataKeyField = "NoteId"; NoteInfo.DataBind(); }