问题
Today I read about the new features in ASP.NET Identity 2.0 alpha.
http://blogs.msdn.com/b/webdev/archive/2013/12/20/announcing-preview-of-microsoft-aspnet-identity-2-0-0-alpha1.aspx
Apparently the possibility to use and int or a guid as the primary key for the AspNetUsers table was added after numerous post/questions on stackoverflow.
I started using ASP.NET Identity when the RTM was announced. Since then I have been using the default string (nvarchar(128)) type for the Id column in the AspNetUsers table.
I want my app to be futureproof. So what I'm wordering is wheather or not I should follow the instructions in these new documents on how to change your Id column to and int or a guid.
What is the most appropriate for an e-commerce site?
What is the most appropriate for a regular site?
When to use what?
Update 1:
Already found one good thing about using an int while testing PrimaryKeysConfigTest WebForms sample app (https://aspnet.codeplex.com/SourceControl/latest Samples->Identity->ChangePK->PrimaryKeysConfigTest). When updating the table AspNetUserRoles manually in SQL Server Object Explorer you don't need to copy paste the long guid-string into the UserId and RoleId columns. You remember them by heart.
Update 2:
https://aspnet.codeplex.com/SourceControl/latest Samples->Identity->Identity-PasswordPolicy->Identity-PasswordPolicy is an MVC application and uses a nvarchar(128) for the Id column in AspNetUsers table. If you're looking to implement the new user account confirmation/forgot password features in ASP.NET Identity 2.0 alpha for an MVC application then this is the sample app you should look at.
来源：https://stackoverflow.com/questions/21383901/asp-net-identity-update-column-type-for-primary-key-id-in-aspnetusers-table-from