LINQ: Split Where OR conditions

Question

So I have the following where conditions

sessions = sessions.Where(y => y.session.SESSION_DIVISION.Any(x => x.DIVISION.ToUpper().Contains(SearchContent         


        

Answer 1

You can create an extension method to conditionally apply the filter:

public static IQueryable WhereIf(
   this IQueryable source, bool condition, 
   Expression> predicate)
{
    return condition ? source.Where(predicate) : source;
}

And use it like this:

using static System.String;

...

var res = sessions
   .WhereIf(!IsNullOrEmpty(Division), y => y.session.SESSION_DIVISION.ToUpper().Contains(SearchContent))
   .WhereIf(!IsNullOrEmpty(Room), y => y.session.ROOM.ToUpper().Contains(SearchContent))
   .WhereIf(!IsNullOrEmpty(course), y => y.session.COURSE.ToUpper().Contains(SearchContent)));