<EditItemTemplate>
                id:
                <asp:Label ID="idLabel1" runat="server" Text='<%# Eval("id") %>'></asp:Label
                user:
                <asp:TextBox ID="userTextBox" runat="server" Text='<%# User.Identity.Name %>'>
                </asp:TextBox><br />
                <asp:LinkButton ID="UpdateButton" runat="server" CausesValidation="True" CommandName="Update"
                    Text="Update">
                </asp:LinkButton>
                <asp:LinkButton ID="UpdateCancelButton" runat="server" CausesValidation="False" CommandName="Cancel"
                    Text="Cancel">
                </asp:LinkButton>
            </EditItemTemplate>

UpdateCommand="UPDATE [test] SET [user] = @userTextBox WHERE [id] = @id">
            <UpdateParameters>
                <asp:ControlParameter ControlID="FormView1" Name="userTextBox" Type="String" />
                <asp:Parameter Name="id" Type="Int32" />
            </UpdateParameters>