Cast? Which is the correct way?

  • Thread starter Thread starter shapper
  • Start date Start date
S

shapper

Hello,

Is there a difference between using:
controller = ObjectFactory.GetInstance(controllerType) as
IController;

Or
controller = (IController)ObjectFactory.GetInstance(controllerType);

I see the first one with a VB similar sintax and the second one as C#.
But C# accepts both ...

How should I use it?

Thank You,
Miguel
 
Hello,

Is there a difference between using:
controller = ObjectFactory.GetInstance(controllerType) as
IController;

Or
controller = (IController)ObjectFactory.GetInstance(controllerType);

I see the first one with a VB similar sintax and the second one as C#.
But C# accepts both ...

How should I use it?

Thank You,
Miguel
Click to expand...

The first one will simply return null and not throw an exception if the
cast fails, while the other one will.
 
Is there a difference between using:
controller = ObjectFactory.GetInstance(controllerType) as
IController;

Or
controller = (IController)ObjectFactory.GetInstance(controllerType);

I see the first one with a VB similar sintax and the second one as C#.
But C# accepts both ...

How should I use it?
Click to expand...

The first return null if cast not possible the last throw an
exception if cast not possible.

In most cases I will recommend the last, because it gives
much easier to find errors.

Arne
 
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