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Asked: 2026-05-11T17:15:00+00:00

I have a simple databasescheme: User, Account. User has 1-to-many relationship with Account. I

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I have a simple databasescheme: User, Account. User has 1-to-many relationship with Account.

I have generated a ado.net entity data model, and I can create users and accounts, and even link them together. In the database the account.user_id is correctly filled, so theoretically I should be able to acces User.Account.ToList() in C# through entity.

However, When I try to acces User.Account.ToList() I get zero results.

User user = db.User.First(U => U.id == 1);
List<Account> accounts = user.Account.ToList(); ##count = 0...

When I add the following code before the previous code it suddenly gives me the correct count 2.

 Account account1 = db.Account.First(A => A.id == 1);
 Account account2 = db.Account.First(A => A.id == 2);
 User user = db.User.First(U => U.id == 1);
 List<Account> accounts = user.Account.ToList(); ##count = 2...??

What am I missing here??

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1 Answer

  1. Editorial Team

    You should use the ObjectQuery.Include method for this. Your method works also but results in an additional query.

    In your example you would get

    User user = db.User.Include("Account").First(u => u.id == 1);

    You have to figure out whether the string "Account" is correct. Usually it should be prefixed with something like MyEntities. This depends on the namespace of your entities but with a little trial and error you should be able to figure this out.

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