event subscription notification

[Guest]

Hi all

I have a class MyClass that exposes event A. Inside the class, I need to
catch the moment when some other class subscribes to the event A.
In other words, when some other class executes something like

public MyOtherClass()
{
...
MyClass.A += new AEventHandler(MyHandlerA);
}

I need class MyClass to be notified somehow about this.

Any ideas?
Thank you

 

[Oliver Sturm]

I have a class MyClass that exposes event A. Inside the class, I need to
catch the moment when some other class subscribes to the event A.
In other words, when some other class executes something like

public MyOtherClass()
{
...
MyClass.A += new AEventHandler(MyHandlerA);
}

I need class MyClass to be notified somehow about this.

There's a syntax that you should be able to use here:

class MyClass {
AEventHandler myHandlers;
public event AEventHandler A {
add {
myHandlers += value;
// do whatever else you want
}
remove {
myHandlers -= value;
// do whatever else you want
}
}
}



Oliver Sturm

 

[Nicholas Paldino [.NET/C# MVP]]

Alex,

You can use the following syntax (much like property assignments):

public class Test
{
public event EventHandler SomeEvent
{
add
{
// Perform some code before the subscription.
// Add the event.
SomeEvent += value;
// Perform some code after the subscription;
}
remove
{
// Perform some code before the subscription.
// Remove the event.
SomeEvent -= value;
// Peroform some code after the subscription.
}
}
}

Hope this helps.

 

[Nicholas Paldino [.NET/C# MVP]]

Oops, I had an infinite recursion here. Do what Oliver suggested, declaring
the private field.


--
- Nicholas Paldino [.NET/C# MVP]
- (e-mail address removed)

Alex,

You can use the following syntax (much like property assignments):

public class Test
{
public event EventHandler SomeEvent
{
add
{
// Perform some code before the subscription.
// Add the event.
SomeEvent += value;
// Perform some code after the subscription;
}
remove
{
// Perform some code before the subscription.
// Remove the event.
SomeEvent -= value;
// Peroform some code after the subscription.
}
}
}

Hope this helps.


--
- Nicholas Paldino [.NET/C# MVP]
- (e-mail address removed)

Hi all

I have a class MyClass that exposes event A. Inside the class, I need to
catch the moment when some other class subscribes to the event A.
In other words, when some other class executes something like

public MyOtherClass()
{
...
MyClass.A += new AEventHandler(MyHandlerA);
}

I need class MyClass to be notified somehow about this.

Any ideas?
Thank you