private System.Data.DataRow GetCurrentRow(System.Windows.Forms.DataGridView pdg)
        {
            try
            {
                if (pdg.DataSource == null)
                    return null;
                int iIndex =Convert.ToInt32(pdg.CurrentRow);
                if (iIndex == -1)
                    return null;
                System.Data.DataTable dt = (DataTable)(pdg.DataSource);
                return dt.Rows[iIndex];
            }
            catch
            {
                return null;
            }
        }