ASP.NET RequiredFieldValidator - Show required fields in summary

I've used the '*' as the RequiredFieldValidator Error Message.  How do I display the name of the required fields in the summary?

  See the attachment.
I'm using Visual Studio 2005 and C#

label>PartNumber: </label>
                    <asp:TextBox ID="PartNumberTextBox" runat="server" Text='<%# Bind("PartNumber") %>' />                        
                    <asp:RequiredFieldValidator ID="RequiredFieldValidator1" ControlToValidate="PartNumberTextBox"
                    runat="server" ErrorMessage="*"></asp:RequiredFieldValidator>
RequiredFields.png