public static string GetSpFacevalue(string pregistration_no, string pinstrument_number)
        {
            SpManager spManager = new SpManager();

            Dictionary <string, object> inputParam = new Dictionary <string, object>();

            inputParam.Add("pregistration_no", pregistration_no);
            inputParam.Add("pinstrument_number", pinstrument_number);
            DataTable dt = spManager.GetImportedSpFacevalue(inputParam);

            HttpContext.Current.Session["SpFaceValue"] = dt;
            DataTable filteredData = new DataTable();

            filteredData.Columns.Add("INSTRUMENT_NUMBER");
            filteredData.Columns.Add("DENOMINATION");
            foreach (DataRow dr in dt.Rows)
            {
                DataRow row = filteredData.NewRow();
                row["INSTRUMENT_NUMBER"] = dr["INSTRUMENT_NUMBER"];
                row["DENOMINATION"]      = dr["DENOMINATION"];
                filteredData.Rows.Add(row);
            }

            return(DatatableToJson(filteredData));
        }