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is keyword

  • Articolo

I don't know how I missed the is keyword in C#. I must have been asleep or something when I read about this. Up till now I've been getting the type of an object and comparing to the typeof() a class.

 object foo = "bar";

if (foo is string)
{
    Console.WriteLine("foo is a string");
}

if (foo.GetType() == typeof(string))
{
    Console.WriteLine("foo is a string");
}

Comments

  • Anonymous
    March 25, 2004
    I tend to use the 'as' keyword with a test for null. Reason is that when I'm checking a type, I usually want to go on and cast to that type - your example above is of course more suited for is...but say, sor example I want to cast to a string.

    string testString = testObject as string;
    if(testString != null)
    {
    //Do whatever I want with the string...
    }
  • Anonymous
    March 25, 2004
    The comment has been removed
  • Anonymous
    March 26, 2004
    The comment has been removed