ToArray() ?

[Peter Kirk]

Hi

I call a method which returns an IList containing a list of one type of
object. How do I best convert this IList to an array?

I can see that the ArrayList class has a ToArray() method - but this is not
part of IList.

(I do in fact know that the method I call actually returns an ArrayList as I
have looked in the source code, but technically I really only know it is an
IList).

Thanks,
Peter

[Mattias Sjögren]

Re: ToArray() ?

[color=blue]
>I call a method which returns an IList containing a list of one type of
>object. How do I best convert this IList to an array?[/color]

IList list = ...
Foo[] foos = new Foo[list.Count];
for ( int i = 0; i < foos.Length; i++ )
foos[i] = (Foo)list[i];



Mattias

--
Mattias Sjögren [MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
Please reply only to the newsgroup.

[Peter Kirk]

Re: ToArray() ?


"Mattias Sjögren" <mattias.dont.w ant.spam@mvps.o rg> skrev i en meddelelse
news:OyigwXMbFH A.2996@TK2MSFTN GP10.phx.gbl...[color=blue]
>[color=green]
>>I call a method which returns an IList containing a list of one type of
>>object. How do I best convert this IList to an array?[/color]
>
> IList list = ...
> Foo[] foos = new Foo[list.Count];
> for ( int i = 0; i < foos.Length; i++ )
> foos[i] = (Foo)list[i];[/color]

Well, yeah. I just thought there might be an "in bult" method a la
ArrayList's ToArray().

Thanks,
Peter

[Peter Rilling]

Re: ToArray() ?

How about using ICollection.Cop yTo(...). IList implements ICollection.


"Peter Kirk" <pk@alpha-solutions.dk> wrote in message
news:epPKveMbFH A.2124@TK2MSFTN GP14.phx.gbl...[color=blue]
>
> "Mattias Sjögren" <mattias.dont.w ant.spam@mvps.o rg> skrev i en meddelelse
> news:OyigwXMbFH A.2996@TK2MSFTN GP10.phx.gbl...[color=green]
> >[color=darkred]
> >>I call a method which returns an IList containing a list of one type of
> >>object. How do I best convert this IList to an array?[/color]
> >
> > IList list = ...
> > Foo[] foos = new Foo[list.Count];
> > for ( int i = 0; i < foos.Length; i++ )
> > foos[i] = (Foo)list[i];[/color]
>
> Well, yeah. I just thought there might be an "in bult" method a la
> ArrayList's ToArray().
>
> Thanks,
> Peter
>
>[/color]

[Daniel O'Connell [C# MVP]]

Re: ToArray() ?


"Peter Kirk" <pk@alpha-solutions.dk> wrote in message
news:u0yawFMbFH A.1404@TK2MSFTN GP09.phx.gbl...[color=blue]
> Hi
>
> I call a method which returns an IList containing a list of one type of
> object. How do I best convert this IList to an array?
>[/color]

You can load it into an ArrayList and uses ArrayLists.ToAr ray() if you
aren't worried about performance, otherwise I'd recommend writing a ToArray
implemetnation that takes an IList. Its not terribly hard to do, especially
if you know the type the list is going to be at all times.