Require unique Email AND Username

Question

It's easy to use SimpleMembership in ASP.net MVC 4 to require users to enter a unique username - or swap that out for a unique email.

However - whats the easiest way to require both a unique username AND email when registering?

Piotr Stapp · Answer 1 · 2013-04-07T19:55:01.710

1

Add unique constraint to your datbabase will be the easiest way. You can call SQL script in database initialization.

One more thing. Before registering you can get users by email and by username and check this logic yourself. But for this you will have to query database yourself, because SimpleMembership does not have such feature.

UPDATE If you are using .NET 4.5 you can use: http://msdn.microsoft.com/pl-pl/library/system.web.security.membershipprovider.requiresuniqueemail.aspx

So your web.config will look like

<membership>
  <providers>
    <add name="SimpleMembershipProvider" 
         type="whatever your assembly name is"
         ... 
         requiresUniqueEmail="true"/>

edited Apr 07 '13 at 19:55

answered Apr 07 '13 at 19:48

Piotr Stapp

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Sorry i should have said - Im using Code First – niico Apr 08 '13 at 01:57
So you use custom membership provider or you use code first with simple provider? – Piotr Stapp Apr 08 '13 at 04:26

Require unique Email AND Username

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