ArrayList Problem

erictamlam · May 12th, 2007, 09:30 AM

hey experts
is there any way I can assign an object array to a variable of a specific type in a C# programme?
eg.I defined a class 'Rental' and an object array like this:
private ArrayList _rentals=new ArrayList();
provided that array "_rentals" has some object instances added.
Then I need to assign all those object instances to a variable of a specific type.any way to make it?
It's available in Java programmes:
Enumeration rentals=_rentals.elements();
Rental each=(Rental)rentals.nextElement();
but I'm not sure if it's also available in a c# programme.
great appreciation.kinda urgent!

ERIC

joefawcett · May 12th, 2007, 09:44 AM

Code:

foreach (object item in _rentals)
{
  Rental rental = item as Rental;
  //do something with rental
}

You'd be better off using a typed list to start with:

Code:

using System.Collections.Generic;

List<Rental> rentals = new List<Rental>();
Rental rental1 = new Rental();
Rental rental2 = new Rental();
rentals.Add(rental1);
rentals.Add(rental2);
foreach (Rental rental in rentals)
{
  //do something with rental
}
rentals

--

Joe (Microsoft MVP - XML)

erictamlam · May 12th, 2007, 10:02 AM

is this also ok?
eg.IEnumerator rentals = (Rental)_rentals.GetEnumerator();
I can use its method "MoveNext" and property "current" to access each object instance.but how can I know all instances have been accessed?
Jave syntax is like this:
while(rentals.hasMoreElements())
{
.....
}
how about in a C# programme?THANKS

ERIC

erictamlam · May 12th, 2007, 10:04 AM

oh,I'm so retarded!! foreach(.....),right?

ERIC