Question

I use EF and set DataSource of bindingSource as User.

now in listBox I would Like to set valueMember asUserId
and DisplayMember as Product.ProductName (nested property)

schemat is:

User
_________
UserId
UserName
ProductId


Product
_________
ProductId
ProductName

I WOuld like to bind a lot of Users to that control and display ProductNames but now there is visible only one ProductName even though there are for example 4 users.

Answer 1

The classes generated by EF are partial, so you can create another source file and add a property to your User class, like that:

public partial class User {
    public string ProductName { get { return this.Product.ProductName; } }
}

this way you would not need to access nested properties for DisplayMember.