// all studennndts
        public DataTable getAllStd()
        {
            connectionClass obj = new connectionClass();


            obj.openConn();

            DataTable dt = new DataTable();

            dt = obj.readData("GET_ALL_STD", null);
            obj.CloseConn();
            return(dt);
        }
        // get all matched std

        public DataTable getAllMatchedStd(string fname)
        {
            SqlParameter[]  paraFname = new SqlParameter[1];
            connectionClass obj       = new connectionClass();


            obj.openConn();

            paraFname[0]       = new SqlParameter("@std_fname", SqlDbType.NVarChar, 30);
            paraFname[0].Value = fname;


            DataTable dt = new DataTable();

            dt = obj.readData("GET_ALL_MATCHED_STD", paraFname);
            obj.CloseConn();
            return(dt);
        }