Get first item in list from linq query

Question

I wish to get just the very first record I realize the the \"Take() will not work.

So I have a List that queries another list

List etch         


        

Answer 1

Use the FistOrDefault method to safely return the first item from your query, or null if the query returned no results:

var result =
    (from vio in AddPlas
     where etchList.Any(vioID => vio.Key.Formatted.Equals(vioID))
     select new
     {
        EtchVectors = vio.Shapes.FistOrDefault()
     })

Or equivalently:

var result = AddPlas.Where(x => etchList.Any(y => x.Key.Formatted.Equals(y)))
                    .Select(x => new { EtchVectors = x.Shapes.FistOrDefault() });

Answer 2

I don't suppose it's as easy as First()?

If you expect that your query will not return any results, use FirstOrDefault()

Update

If what you are asking for is "Get the first Shapes from each AddPla", then add the First to your select statement, rather than at the end

select new { EtchVectors = vio.Shapes.First() }

Answer 3

You can try with FirstOrDefault.

var query = (from vio in AddPlas
            where etchList.Any(vioID => vio.Key.Formatted.Equals(vioID))
            select new
            {
                EtchVectors = vio.Shapes
            }).FirstOrDefault();