How do you -- Declare a List object implementing a class type that supports events

Mark Maguire

I need to initialize a List object and assign it to a class type that supports events.

If I wanted to intialize my class normally to support events it would be:

        oObj = new MyClass();
        oObj.evtMyEvent += new RecordDealt(RecordRead);

I have a collection set up of MyClass using the following code:

        oObj = new List

How do I initialise it so that I can access events from MyClass whilst still being in a List?

Thanks
M

4 Replies

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Felipe Ramos15y ago
Accepted answer
If I am understanding correctly, it sounds like you want to have access to the list events. If that is the case, it would be better to inherit from List something like

public class YourClass : List
{
public event ItemAdded OnItemAdded;
public delegate void ItemAdded(T item);

public new void Add(T item)
{
base.Add(item);
OnItemAdded(item);
}
}

static void Main(string[] args)
{
YourClass test = new YourClass();
test.OnItemAdded += (s) =>
{
Console.WriteLine(string.Format("Item Added: {0}", s));
};

test.Add(90);

Console.ReadKey();
}
0
Felipe Ramos15y ago
Anytime Mark.
0
Mark Maguire15y ago
Thanks for the help :)
0
Vulpes15y ago
You need to wire up each element of the list to an event in the usual way.

You can do this either before the element is added to the list or afterwards.

var oObj = new List();
var mc = new MyClass();
mc.evtMyEvent += new RecordDealt(RecordRead);
oObj.Add(mc);
var mc2 = new MyClass();
oObj.Add(mc2);
oObj[1].evtMyEvent += new RecordDealt(RecordRead);
0