Question

Possible Duplicate:
Type result with Ternary operator in C#

I ran into this scenario, and there doesn’t seem to be a natural way to return a nullable int. The code below gives compilation error because the ternary operator doesn’t like null.

public int? userId
{
    get
    {
        int rv;
        return int.TryParse(userIdString, out rv) ? rv : null;
    }
}

So you (or just me) really have to go all the way and spell it all out:

public int? userId
{
    get
    {
        int id;
        if(int.TryParse(userIdString, out id)){
           return id;
        }
        return null;
    }
}

EDIT: Is there a more natural way of instantiating a nullable, to make the ternary operator work?

Answer 1

public int? userId 
{ 
    get 
    { 
        int rv; 
        return int.TryParse(userIdString, out rv) ? (int?)rv : null; 
    } 
}