How to: Raise Events Defined in a Different Assembly
An event and event handler can be defined in one assembly, and consumed by another assembly.
Legacy Code Example
The following sample defines the event:
// mcppv2_events8.cpp
// compile with: /LD /clr
using namespace System;
public delegate void Del(String^ s);
public ref class Source {
public:
event Del^ Event;
void Fire(String^ s) {
Event(s);
}
};
The following client code consumes the event:
// mcppv2_events9.cpp
// compile with: /clr
#using "mcppv2_events8.dll"
using namespace System;
ref class Receiver {
public:
void Handler(String^ s) {
Console::WriteLine(s);
}
};
int main() {
Source^ src = gcnew Source;
Receiver^ rc1 = gcnew Receiver;
Receiver^ rc2 = gcnew Receiver;
src -> Event += gcnew Del(rc1, &Receiver::Handler);
src -> Event += gcnew Del(rc2, &Receiver::Handler);
src->Fire("hello");
src -> Event -= gcnew Del(rc1, &Receiver::Handler);
src -> Event -= gcnew Del(rc2, &Receiver::Handler);
}
Output
hello
hello