help in class type converstion

[Cheryl]

I am trying to use ArrayList to implement a class Wordlist.

Wordlist wordlist;

public ListOfData()
{
wordlist = new ArrayList();
}

But then when I try to access the objects in the ArrayList, Object is
returned instead of type Wordlist. What should I do in order to access the
member functions of wordlist?

[Vadym Stetsyak]

inherit Wordlist from ArrayList and then just call wordlist = new
Wordlist();

"Cheryl" <ch********@NOSPAM.cuhk.edu.hk> wrote in message
news:et**************@TK2MSFTNGP12.phx.gbl...

I am trying to use ArrayList to implement a class Wordlist.

Wordlist wordlist;

public ListOfData()
{
wordlist = new ArrayList();
}

But then when I try to access the objects in the ArrayList, Object is
returned instead of type Wordlist. What should I do in order to access the member functions of wordlist?

[Jon Skeet [C# MVP]]

Cheryl <ch********@NOSPAM.cuhk.edu.hk> wrote:

I am trying to use ArrayList to implement a class Wordlist.

Wordlist wordlist;

public ListOfData()
{
wordlist = new ArrayList();
}
That's not going to work to start with, as you've declared wordlist to
be of type Wordlist, not ArrayList.
But then when I try to access the objects in the ArrayList, Object is
returned instead of type Wordlist. What should I do in order to access the
member functions of wordlist?

Just cast when you retrieve the object, e.g.

Foo x = (Foo) myArrayList[0];

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Jon Skeet [C# MVP]]

Vadym Stetsyak <pd****@ukr.net> wrote:

inherit Wordlist from ArrayList and then just call wordlist = new
Wordlist();

In my experience there's rarely a good reason to inherit from
ArrayList. For strong typing, you'd use CollectionBase instead. For
most other purposes, it would be better to use composition rather than
inheritance.
--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too