protected void grdResult_RowUpdating(object sender, System.Web.UI.WebControls.GridViewUpdateEventArgs e)
        {
            string query = "UPDATE Books";

            string where = "WHERE Id = " + e.Keys[0];

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

            parametters.Add("Title", e.NewValues[0] == null ? string.Empty : e.NewValues[0]);
            parametters.Add("Author", e.NewValues[1] == null ? string.Empty : e.NewValues[1]);

            MySqlProvider.ExecuteSqlQueryUpdate(query, where, parametters, reader => grdResult_RowCancelingEdit(sender, null));
        }