Safe C# : how to hold a pointer or a reference ?

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0.00/5 (No votes)

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Hello.

Would it be possible
to hold an object reference
in the safe class context of C#, please ? :-O :)

C#

public abstract class WizardPage : UserControl
{
    private Wizard wizard;

    public WizardPage(ref Wizard wizardRef)
    {
        wizard = wizardRef; // hmmm... is it just a copy now ? :)
    }

    public abstract void OnBack();
    public abstract void OnActivate();
    public abstract void OnNext();
    ...
}

Thank You !

Posted 27-Jul-10 5:07am

Eugen Podsypalnikov

Updated 27-Jul-10 5:09am

v2

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3 solutions

Solution 3

Thank you ! :)

Understood :-D :

{
  object o1 = new object(); // o1 is a reference to an real instance in the memory

  object o2;                // o2 is a empty reference yet

  o2 = o1;                  // o2 is a reference to the same instance
                            // referenced by o1, not a reference to an own instance (!!) 

}

Posted 27-Jul-10 21:28pm

Eugen Podsypalnikov

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DaveyM69 · Accepted Answer · 2010-07-27T09:56:00

Solution 1

If Wizard is a class (reference type) then you can just pass it without the ref.

C#

private Wizard wizard;

public WizardPage(Wizard wizard)
{
    this.wizard = wizard;
}

Posted 27-Jul-10 9:56am

DaveyM69

Comments

Eugen Podsypalnikov 28-Jul-10 3:20am

Reason for my vote of 5
Was a base to understand, that the this.wizard is a reference after the "=" operation (not an instance as after the "= new" operation) !!

Not Active · Accepted Answer · 2010-07-27T09:58:00

Solution 2

Maybe this discussion will help, http://stackoverflow.com/questions/1696938/c-objects-by-ref[^]

Posted 27-Jul-10 9:58am

Not Active

Comments

Eugen Podsypalnikov 28-Jul-10 3:18am

Reason for my vote of 5
It was very usefull for me