<asp:TemplateField HeaderText="CodeInse" SortExpression="CodeInsee" Visible="false">

                <ItemTemplate>
                    <asp:Label ID="CodeInsee" runat="server" Text='<%# Bind("CodeInsee")%>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>

        <asp:TemplateField HeaderText="Nom" SortExpression="Nom">
                <EditItemTemplate>
                    <asp:TextBox ID="lb_Nom" runat="server" Text='<%# Bind("Nom") %>' ></asp:TextBox>
                    <asp:RequiredFieldValidator
ID="RequiredFieldValidator1" runat="server" ForeColor="#cc0000"  SetFocusOnError="True" ControlToValidate="lb_Nom" ValidationGroup="ValidationGroup1" ErrorMessage="Nom du champ requis"></asp:RequiredFieldValidator>
                </EditItemTemplate>
                <ItemTemplate>
                    <asp:Label ID="lb_editNom" runat="server" Text='<%# Bind("Nom") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>