Question

I have this function:

/// <summary>
/// Return array of all badges for a users
/// </summary>
public static Badge[] getUserBadges(int UserID)
{
    Badge[] ReturnBadges;

    using (MainContext db = new MainContext())
    {
        var q = db.tblBadgeUsers
        .Where(c => c.UserID == UserID)
        .GroupBy(c => c.BadgeID)
        .Select(c => new { BadgeCount = c.Count(), TheBadge = c });

        ReturnBadges = new Badge[q.Count()];
        int i = 0;
        foreach (var UserBadge in q)
        {
            ReturnBadges[i] = new Badge(UserBadge.TheBadge.Key);
            ReturnBadges[i].Quantity = UserBadge.BadgeCount;
            i++;
        }
    }

    return ReturnBadges;
}

I wish to order by tblBadges.OrderID ascending but I can’t seem to find out where to put it, can anyone help?

I’ve tried:

.OrderBy(c=> c.TheBadge.OrderID)

But it’s not valid code. TheBadge.Key in the loop is a tblBadges type. It’s confusing me a bit why intellisense wont let me do the order by anywhere!

Answer 1

TheBadge isn’t a single badge, it’s a group of badges… so I’d personally rename it if I were you. Now, which OrderId do you want to get? You’ve got multiple entities in the gruop. For example, you could do this:

var q = db.tblBadgeUsers
    .Where(c => c.UserID == UserID)
    .GroupBy(c => c.BadgeID)
    .Select(c => new { BadgeCount = c.Count(), TheBadge = c })
    .OrderBy(x => x.TheBadge.First().OrderId);

That will order by some notional “first” element – although I don’t know what the generated SQL will look like.

If you expect the OrderId to be the same for every badge with the same ID, you might use:

var q = db.tblBadgeUsers
    .Where(c => c.UserID == UserID)
    .GroupBy(c => new { c.BadgeID, c.OrderID })
    .OrderBy(group => group.Key.OrderID)
    .Select(c => new { BadgeCount = c.Count(), TheBadge = c });