Question

I’m doing a linq-to-sql query and I wish the LastOrDefault operator were available but it’s not. So, I’m writing the query like this:

TheUserNote = ((from note in MyDC.UserNotes
  where note.UserID == TheUserID
  select note.NoteText).Skip(
    (from n in MyDC.UserNotes
     where n.UserID == TheUserID
     select n.NoteID).Count() - 1)).SingleOrDefault(),

Basically, I want to use Skip and Count to get to the last item: count how many items there are, substract 1, and skip for that number.
It’s not working and I’m looking to fix it. The problem is that sometimes Count can be 0 so I get an error saying parameters are not valid since in that case Count will be -1.

Any suggestions?

Thanks.

Answer 1

You might try .Reverse().FirstOrDefault(), or if you have a date column or primary key column try .OrderByDescending(...).FirstOrDefault().

Using your variable names and comment:

var TheUserNote
    = MyDC
    .UserNotes
    .Where(x => x.UserId == TheUserID)
    .OrderByDescending(x => x.NoteDateTime)
    .FirstOrDefault()
;