gridview connect to ms sql with txt file query and get data to gridview with summary

            string connectionString = null;
            SqlConnection cnn;
            connectionString = "Server = " + ondegerler.SQLBAGLANTISI_KAYNAK + "; Database = " + ondegerler.SQLBAGLANTISI_VERITABANI + "; User Id = " + ondegerler.SQLBAGLANTISI_KULLANICI + "; Password = " + ondegerler.SQLBAGLANTISI_PAROLA;
            FileInfo file = new FileInfo(Application.StartupPath + "\\tbl_cariler.txt");
            string script = file.OpenText().ReadToEnd();
            cnn = new SqlConnection(connectionString);
            SqlDataAdapter da = new SqlDataAdapter(script, cnn);
            DataTable dt = new DataTable();
            da.Fill(dt);
            gridControl1.DataSource = dt;
            gridView1.Columns[1].SummaryItem.SummaryType = DevExpress.Data.SummaryItemType.Count;
            gridView1.Columns[1].SummaryItem.DisplayFormat = "Adet = {0}";

            gridView1.Columns["Bakiye"].SummaryItem.SummaryType = DevExpress.Data.SummaryItemType.Sum;
            gridView1.Columns["Bakiye"].SummaryItem.DisplayFormat = "Toplam = {0}";
            gridView1.BestFitColumns();