Question

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LINQ to SQL: Return anonymous type?

What return type do I use for a List<> on a linq join? I’m joining multiple tables below, I’m getting the error 'Cannot implicitly convert type System.Collections.Generic.List<AnonymousType#1> to System.Collections.Generic.List<CargoTanksDAL.aspnet_Users>

    public List<> GetAspnetUsersWithMembershipAndCompany()
    {

        using (DevCargoEntities db = new DevCargoEntities())
        {
            var users = from u in db.aspnet_Users
                        join mem in db.aspnet_Membership on u.UserId equals mem.UserId
                        join cl in db.CT_CompanyLogIn on u.UserName equals cl.UserLogIn
                        join companies in db.CT_Companies on cl.CompanyID equals companies.CompanyID
                        select new
                        {
                            u.UserId,
                            u.UserName,
                            mem.Email,
                            mem.IsLockedOut,
                            mem.IsApproved,
                            mem.CreateDate,
                            companies.CompanyName
                        };

            return users.ToList();
        }
    }

Answer 1

I would have made a new class.. for this user..

public class SomeKindOfUser
{
    public int UserId { get; set; }
    public string UserName { get; set; }
    public string Email { get; set; }
    public bool IsLockedOut { get; set; }
    public bool IsApproved { get; set; }
    public DateTime CreateDate { get; set; }
    public string CompanyName { get; set; }
}

Now you can use

public List<SomeKindOfUser> GetAspnetUsersWithMembershipAndCompany()

Then in the select :

select new SomeKindOfUser
{
    UserId = u.UserId,
    UserName = u.UserName,
    Email = mem.Email,
    IsLockedOut = mem.IsLockedOut,
    IsApproved = mem.IsApproved,
    CreateDate = mem.CreateDate,
    CompanyName = companies.CompanyName
};