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BOOK: Beginning ASP.NET 4 : in C# and VB
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Old August 31st, 2012, 10:42 AM
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Default ASP.Net Membership - Foreign Key

Imar, this question is not directly an issue with the book but rather a related issue that I was wondering if you will be kind to point me to a place to the right direction. I am building the Planet Wrox website and as well I am building a small website to make sure I am grabbing the concepts. In my application I have two conceptual tables: Bill and Users.

In the Bills table, I have columns like Bill ID, Bill Name, Bill Category, FK_User_ID and this FK_User_ID points to the user ID of my conceptual User table. Now in reality I have used the ASP.Net Membership instead of my conceptual user table. My question is how can I retrieve or reference the user ID of a user from Membership so I can reference it in my sqldatasource query. The goal is to show in the GridView and DetailsView only the tuples from the Bills table where the FK_user_ID matches the current user.

I have read up to chapter 13, and I have also jumped to chapter 16 but still struggling to find the answer, do you think I will find my answer in chapter 17 (Personalization) or if I need to read this in msdn, please point me to the right direction.

Old September 1st, 2012, 06:45 AM
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Hi Valentine,

The MembershipUser class has a ProviderUserKey property that returns the unique ID of the user from the database.

Something like this:

Guid userId = (Guid)Membership.GetUser().ProviderUserKey;
should give you the unique ID of the currently logged in user.

However, Microsoft recommends to not use this key and treat it as internal. Instead, you should use a combination of the user name and the application name. If you only store data of one application in your database, you can ignore the application name part.

You retrieve the name of the user from User.Identity.Name. Chapter 17, page 642 shown an example where the user name is used to link a photo album to a user.


Imar Spaanjaars
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Author of Beginning ASP.NET 4.5 : in C# and VB, Beginning ASP.NET Web Pages with WebMatrix
and Beginning ASP.NET 4 : in C# and VB.
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Old September 1st, 2012, 10:34 AM
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Thanks a lot, I will give it a try and hope to get it work


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