questo è quello che ho scritto. per i campi non chiave dopo l'operazione di modifica, vengono visualizzati i nuovi valori, per gli altri, quelli originali
<asp:GridView ID="GridView1" runat="server" OnRowUpdating="row_up" AllowPaging="True" AllowSorting="True"
AutoGenerateColumns="False" DataSourceID="AccessDataSource1" DataKeyNames="COM_ID,ELET_ID,ID_CIRC">
<Columns>
<asp:BoundField DataField="COM_ID" HeaderText="COM_ID" SortExpression="COM_ID" />
<asp:BoundField DataField="ELET_ID" HeaderText="ELET_ID" SortExpression="ELET_ID" />
<asp:BoundField DataField="ID_CIRC" HeaderText="ID_CIRC" SortExpression="ID_CIRC" />
<asp:BoundField DataField="PARI_DISP" HeaderText="PARI_DISP" SortExpression="PARI_DISP" />
<asp:BoundField DataField="IND_NUM" HeaderText="IND_NUM" SortExpression="IND_NUM" />
<asp:BoundField DataField="IND_SUF" HeaderText="IND_SUF" SortExpression="IND_SUF" />
<asp:CommandField ShowEditButton="True" />
<asp:CommandField ShowSelectButton="True" />
<asp:CommandField ShowDeleteButton="True" />
</Columns>
</asp:GridView>
</div>
<asp:AccessDataSource ConflictDetection="CompareAllValues" OldValuesParameterFormatString="original_{0}" ID="AccessDataSource1" runat="server" DataFile="~/prova.mdb"
DeleteCommand="DELETE FROM [VIE_CIRCOSCRIZIONI] WHERE [COM_ID] = ? AND [ELET_ID] = ? AND [ID_CIRC] = ?"
InsertCommand="INSERT INTO [VIE_CIRCOSCRIZIONI] ([COM_ID], [ELET_ID], [ID_CIRC], [PARI_DISP], [IND_NUM], [IND_SUF]) VALUES (?, ?, ?, ?, ?, ?)"
SelectCommand="SELECT [COM_ID], [ELET_ID], [ID_CIRC], [PARI_DISP], [IND_NUM], [IND_SUF] FROM [VIE_CIRCOSCRIZIONI]"
UpdateCommand="UPDATE [VIE_CIRCOSCRIZIONI] SET [COM_ID] = ?, [ELET_ID] = ?, [ID_CIRC] = ?, [PARI_DISP] = ?, [IND_NUM] = ?, [IND_SUF] = ? WHERE [COM_ID] = ? AND [ELET_ID] = ? AND [ID_CIRC] = ?">
<DeleteParameters>
<asp:Parameter Name="original_COM_ID" Type="Double" />
<asp:Parameter Name="original_ELET_ID" Type="Double" />
<asp:Parameter Name="original_ID_CIRC" Type="Double" />
</DeleteParameters>
<UpdateParameters>
<asp:Parameter Name="COM_ID" Type="Double" />
<asp:Parameter Name="ELET_ID" Type="Double" />
<asp:Parameter Name="ID_CIRC" Type="Double" />
<asp:Parameter Name="PARI_DISP" Type="String" />
<asp:Parameter Name="IND_NUM" Type="Double" />
<asp:Parameter Name="IND_SUF" Type="String" />
<asp:Parameter Name="original_COM_ID" Type="Double" />
<asp:Parameter Name="original_ELET_ID" Type="Double" />
<asp:Parameter Name="original_ID_CIRC" Type="Double" />
</UpdateParameters>
<InsertParameters>
<asp:Parameter Name="COM_ID" Type="Double" />
<asp:Parameter Name="ELET_ID" Type="Double" />
<asp:Parameter Name="ID_CIRC" Type="Double" />
<asp:Parameter Name="PARI_DISP" Type="String" />
<asp:Parameter Name="IND_NUM" Type="Double" />
<asp:Parameter Name="IND_SUF" Type="String" />
</InsertParameters>
</asp:AccessDataSource>
