Question

I Just want to make sure I understand this correctly…

search is an object that contains a querystring.

Repo.Query returns an ObjectQuery<T>.

From my understanding the chained linq statements will filter the results after entity framework has returned all the rows satisfying the query. So really ALL the rows are being returned and THEN filtered in memory. So we are returning a bunch of data that we don’t really want. There’s about 10k rows being returned so this is kind of important. Just like to get my confusion cleared up.

var searchQuery = Repo.Query(search)
                .Where(entity =>
                        entity.Prop1.ToUpper().Equals(prop1.ToUpper()) &&
                        entity.Prop2.ToUpper().Equals(prop2.ToUpper()))
                .OrderBy(entity => Repo.SortExpression ?? entity.prop1);

Answer 1

Your Repo.Query(string query) function should return IQueryable<T>.

Then you can filter and order without getting all rows first.

IQueryable(Of T) Interface

hope this helps