Question

I’m trying to create a search method where I’m wanting to check whether the keywords is contained within a any of number of different columns for a given record.

My Linq statement is as follows:

string[] searchFilter = {"john", "iceberg"};


var q = from qua in qual
                    join del in deliverables on qua.ID equals del.Q_ID
                    where searchFilter.All(s => (qua.Name + " " + qua.Project + " " + qua.Summary + " " + del.Name + " " + del.Summary).ToLower().Contains(s))
                    select qua;

I’m however getting an error message which states: “Local sequence cannot be used in LINQ to SQL implementation of query operators except the Contains() operator.”

Answer 1

The contains method for whatever reason was not using the filtered results when it came through the loop a second time around. The approach that eventually worked was:

var SearchColumn = from qua in Qual
               join del in deliverables on qua.Q_ID equals del.Q_ID into left_j
                            from del in left_j.DefaultIfEmpty()
                            select new { qua.Name + " " + qua.Project + " " + qua.Summary + " " + del.Name + " " + del.Summary).ToLower() };

foreach (var f in searchFilter)
{
   var likestr = string.Format("%{0}%", f);
   SearchColumn = SearchColumn.Where(x => SqlMethods.Like(x.Search_Col, likestr));
}