Question

So I have this Query:

   var list = (from x in xList 
                 join a in AList on x.commonfield equals a.commonfield
                 join b in BList on x.newCommonField equals b.newCommonField
                 from c in Clist.Where(p=>p.connectorID==x.connectorID).DefaultifEmpty()
                                select new { x, a.DesiredFieldFromA, b.DesiredFieldFromB,c.name}).ToList();

    list.ForEach(el =>
                    {
                        el.x.DesiredFieldFromA= el.DesiredFieldFromA;
                        el.x.DesiredFieldFromB= el.DesiredFieldFromB ;
                        el.x.Name=el.name;
                    });
    return list.Select(p=>p.x);

when I do :

select new { x, a.DesiredFieldFromA, b.DesiredFieldFromB,c.name}).ToList();

Question#1: How can I tell it that it should still show me the record … but put string.empty if the name field is null.
Something along :

select new { x, a.DesiredFieldFromA, b.DesiredFieldFromB,c.name??string.Empty}).ToList();

Question#2: How can i tell it that even if “connectorID” is null .. i still need it to show the x record
Thanks in advance!

Solution for #1 and #2 was as follows :

from c in Clist.Where(p=>p.connectorID==x.connectorID).DefaultifEmpty()
                                select new { x, a.DesiredFieldFromA, b.DesiredFieldFromB,name= (c==null) ?"Not Defined": c.name}).ToList();

Answer 1

For Question #1, try this:

select new { 
    x, 
    a.DesiredFieldFromA, 
    b.DesiredFieldFromB, 
    name = c.name ?? string.Empty
}).ToList();

You need to specify the name “name” so you can use your expression to assign it.

For question #2, refer to jonnyGold’s answer.