Casting, generics and interface issue

[amaca]

I have a class, MyClass, which implements two interfaces, IThis and IThat. I
have a list of that class implemented as a generic,
List myList = List<MyClass>.

Can I cast myList so that it looks like a List of IThis (which one chunk of
code needs) and as a List of IThat (which another chunk of code needs)?

I'm not sure whether I don't understand the syntax for casts or have
misunderstood how to implement Generics and Interfaces. Or have I just
designed and coded my way down a blind alley?

Andrew

 

[wackyphill]

Sure,

but dont cast the whole list just cast each item as you use it.

foreach(object o in myList)
{
if( o is IList)
{
IList i = (IList)o;
//Use i;
}
else
{
//Trouble
}
}

 

[Mattias Sjögren]

Can I cast myList so that it looks like a List of IThis (which one chunk of
code needs) and as a List of IThat (which another chunk of code needs)?

You can't cast a List<MyClass> to a List<IThis> no. Even if MyClass
implements IThis there's no inheritance relation between the List
types.


Mattias

 

[amaca]

Thank you. Then at least I know to stop trying!

Andrew