<asp:TemplateField HeaderText="foto" SortExpression="foto">
                    <EditItemTemplate>
                        <br />
                        <asp:FileUpload ID="FileUpload2" runat="server"  />
                        <br />
                        <asp:Button ID="Button2" runat="server" OnClick="Button2_Click1" Text="modifica" />
                    </EditItemTemplate>
                    <InsertItemTemplate>
                        <br />
                        <asp:FileUpload ID="FileUpload1" runat="server" />
                        <br />
                        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click1" Text="salva" />
                    </InsertItemTemplate>
                    <ItemTemplate>
                        <asp:Label ID="Label1" runat="server" Text='<%# Bind("foto") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>