Question

I tried the following:

(id == title) | (id.IsNullOrEmpty) ? "class='enabled'" : ""

But it gives a message saying “Error 22 Operator ‘|’ cannot be applied to operands of type ‘bool’ and ‘method group’

Can anyone tell me what’s wrong. Both id and title are strings.

Answer 1

You’re using bitwise OR (|). You need logical OR (||).

if ( id == null || id == title )
{
   // id is null or id equals title.
}

Note that the equality operator (==) is case sensitive. To do a case insensitive comparison use the static method String.Compare.

if ( id == null || String.Compare( id, title, true ) == 0 )
{
   // id is null or id equals title (ignoring case).
}