"Eric Eggermann >" <<none> wrote in message
news:uLG%2335JTEHA.3476@tk2msftngp13.phx.gbl...
> Thanks for the help last week, but I've got a new problem with a different
> array now.....sigh.
> I want to use an ArrayList to hold unique integer arrays. I've written a
> comparer class which works when I call the function explicitly, but when I
> use the Sort and BinarySearch functions of my ArrayList object I get
> InvalidCast exceptions.
>
> public int Compare(object x, object y)
> {
> return Compare((Array)x, (Array)y); //InvalidCast exception here
> }
> public int Compare(Array x, Array y)
> {
> .... comparison code here is working....
> }
>
> Of course, the ArrayList only contains int[] arrays. Also, the above code
is
> just one of many equally useless tries I've had at this. How do I cast
> between an object reference and an array of ints, so that I can use my
> comparer with ArrayList.Sort and BinarySearch functions?
>
> All ideas well appreciated,
> Eric
>
>
>

<"Eric Eggermann" <<none>>> wrote:
> Thanks for the help last week, but I've got a new problem with a different
> array now.....sigh.
> I want to use an ArrayList to hold unique integer arrays. I've written a
> comparer class which works when I call the function explicitly, but when I
> use the Sort and BinarySearch functions of my ArrayList object I get
> InvalidCast exceptions.
>
> public int Compare(object x, object y)
> {
> return Compare((Array)x, (Array)y); //InvalidCast exception here
> }
> public int Compare(Array x, Array y)
> {
> .... comparison code here is working....
> }
>
> Of course, the ArrayList only contains int[] arrays. Also, the above code is
> just one of many equally useless tries I've had at this. How do I cast
> between an object reference and an array of ints, so that I can use my
> comparer with ArrayList.Sort and BinarySearch functions?

> Eric,
>
> Place a break in the debugger, and see what the types of the variables
x
> and y actually are. You might find that it is something you didn't

"Jon Skeet [C# MVP]" <skeet@pobox.com> wrote in message
news:MPG.1b2e9161caf1154d98ab56@msnews.microsoft.com...

> Could you post a short but complete program which demonstrates the
> problem?
>

"Eric Eggermann >" <<none> wrote in message
news:%23RaPwbOTEHA.2324@TK2MSFTNGP10.phx.gbl...
>
> "Nicholas Paldino [.NET/C# MVP]" <mvp@spam.guard.caspershouse.com> wrote
in
> message news:ebiZ4CKTEHA.3476@tk2msftngp13.phx.gbl...
> > Eric,
> >
> > Place a break in the debugger, and see what the types of the
variables
> x
> > and y actually are. You might find that it is something you didn't
> expect.
>
> I have, and I find that both x, and y in Compare(object x, object y) are
> System.Int32. Didn't really expect that. And the GetType().IsArray returns
> false. So I'm still confused.
>
>