验证摘要未显示

Question

Why my validation summary not show after i click ligin button in my login control. It supposed to show an error message if i leave it blank in username n password box right? Can you guys tell me what should i do? Im using a master page. Thank you.

   <asp:Login ID="Login1" runat="server" BackColor="#F7F7DE" BorderColor="#CCCC99" 
                            BorderStyle="Solid" BorderWidth="1px" Font-Names="Verdana" Font-Size="10pt">
                            <TitleTextStyle BackColor="#6B696B" Font-Bold="True" ForeColor="#FFFFFF" />
                        </asp:Login>
                    </p>
                   <asp:ValidationSummary ID="ValidationSummary1" runat="server" 
    ValidationGroup="Login1" />

Answer 1

ValidationGroup="Login1"

must be specified on each validator & login button control.

Answer 2

All your validation controls (LengthValidator, RegexValidator etc.) will need to be in the same ValidationGroup for the ValidationSummary to pick them up. Can you confirm this is the case?