CODEWITHSUNDEEP
c#oop
Shury
Shury

Reputation: 578

Accessing class variable from another class

I have a class A that contains a List field.

public class A
{
    public List<int> list = new List<int>();
}

I would like to remove an element from the list from class B without making the list in class A static. How can I do that?

Upvotes: 1

Views: 413

Answers (3)

Robert Moskal
Robert Moskal

Reputation: 22553

If you don't mind instantiating it, it's simply

A a = new A();
a.list...

If you don't want to instantiate a new one, you can pass an existing instance to B on its constructor:

public class B{

    private A myA;
    public B( A a) {
        this.myA = a;
    }
    public doSomething(){
        this.myA....
    }
}

Now you can use A as a field of B.

Upvotes: 1

Nazar Merza
Nazar Merza

Reputation: 3454

A more OOP solution for this problem would be:

public class A
{
    private List<int> list = new List<int>();
    List<int> getList();
    void setList(List<int> list);
}

Then in the code where it is used,

A a = new A();
List<int> list = a.getList();
modify list as you want
a.setList(list);

Upvotes: 1

Salah Akbari
Salah Akbari

Reputation: 39946

You could create an instance of class A inside a method in class B. Then you could access the list field, like this:

public class B
{
    void method()
    {
        A a = new A();
        int item = 2;
        a.list.Remove(item);
    }
}

Upvotes: 6

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