Question

I have the following code:

  var qry = from sv in Context.DocStore_SearchValues
            where sv.Category == category
            select sv;
  return qry.FirstOrDefault() != null;

I am getting this message:

Unable to create a constant value of
type
‘SSS.Model.Suburban.DocStore_Category’.
Only primitive types (‘such as Int32,
String, and Guid’) are supported in
this context.

How do I check for null? I tried as a string and I got the same message:

return string.IsNullOrEmpty(qry.FirstOrDefault().ToString());

Any suggestions?

Thank you!

Eroc

Answer 1

You cannot use a non-primitive type in the where clause.

Change it to something like

where sv.Category.Name == someString