DaniWeb Forum Index > Software Development > C#

Unboxing an ArrayList in an object

Please support our C# advertiser: Programming Forums - DaniWeb Sister Site

Thread Solved

•

Join Date: Jul 2009

Posts: 31

Reputation: tdeck is an unknown quantity at this point

Solved Threads: 0

tdeck

Offline

Light Poster

Unboxing an ArrayList in an object

Jul 23rd, 2009

I'm probably going about this in the wrong way, but I have a stack of Objects, and some of these can be ArrayLists. I want to be able to pop an object that is actually an ArrayList off the stack, unbox it, add something, and then pop it back on. For example:

 Help with Code Tags 
 C# Syntax (Toggle Plain Text) 
Stack<Object> s = new Stack<Object>();
ArrayList l = new ArrayList();
Object x;
s.Push(l);
x = s.Pop();
x = (ArrayList)x; //This is the line I don't know how to do
x.Add("Something");
s.push(x);
Stack<Object> s = new Stack<Object>();
ArrayList l = new ArrayList();
Object x;
s.Push(l);
x = s.Pop();
x = (ArrayList)x; //This is the line I don't know how to do
x.Add("Something");
s.push(x);

Does anyone have an idea of how to do what I'm trying to do?

Thanks in advance

Last edited by tdeck; Jul 23rd, 2009 at 11:16 am.

•

Join Date: Jan 2008

Posts: 483

Reputation: DangerDev has a spectacular aura about

Solved Threads: 59

DangerDev

Offline

Posting Pro in Training

Re: Unboxing an ArrayList in an object

Jul 23rd, 2009

do in this way:

 Help with Code Tags 
 C# Syntax (Toggle Plain Text) 
...............
Object x;
x = s.Pop();
ArrayList al=x as ArrayList ;
if(al!=null)
{
 al.Add("Something");
}
...............
...............
Object x;
x = s.Pop();
ArrayList al=x as ArrayList ;
if(al!=null)
{
 al.Add("Something");
}
...............