Question

How can I compare integer type null values Where portion of Linq query in .Net Entity framework 4.1?

Answer 1

You can only compare an int to NULL if the int is nullable. If not, the default value for int will be 0 and never null.

You define a nullable int property like this:

int? value { get; set; }

And check it like this:

if ( value != null )
{
   int x = value.Value;
}

In the where clause of a Linq query it would be

var result = from d in data
             where d.Value != null
             select d