是否有可能对本机类消费.NET事件？ [英] Is it possible for native class to consume .NET event?

问题描述

不知道如何初始化.NET委托指向方法从混合类的实例？

Any idea how to initialize .NET delegate that points to method from 'mixed' class instance?

我有'混'的C ++类是这样的：

I have 'mixed' C++ class like this:

class CppMixClass
{
public:
    CppMixClass(void){
        dotNETclass->StateChanged += gcnew DotNetClass::ServiceStateEventHandler(&UpdateHealthState);
    }
   ~CppMixClass(void);
   void UpdateState(System::Object^ sender, DotNetClass::StateEventArgs^ e){
       //doSmth
   }
}

DotNetClass是用C＃实现的，方法声明是代表确定。 此行生成错误：

DotNetClass is implemented in C#, and Method declaration is OK with delegate. This line generates error:

dotNETclass->StateChanged += gcnew DotNetClass::ServiceStateEventHandler(&UpdateHealthState);
error C2276: '&' : illegal operation on bound member function expression

任何人有一个问题的线索？ 也许怎么把CppMixClass类不是一个纯粹的.NET（REF）班？

Anyone have a clue about a problem? Maybe coz CppMixClass class is not a pure .NET (ref) class?

我得到这个工作的时候UpdateHealthState是静态方法，但我需要指针的实例方法。

I got this to work when UpdateHealthState is static method, but I need pointer to instance method.

我试过水木清华这样的：

I tried smth like:

dotNETclass->StateChanged += gcnew DotNetClass::ServiceStateEventHandler(this, &UpdateHealthState);

但是，这显然是行不通的堂妹这是不是指针（句柄）到.NET（REF）班，（系统：对象）。

But this obviously doesn't work coz this is not pointer (handle) to .NET (ref) class, (System::Object).

ServiceStateEventHandler在C＃中定义为：

ServiceStateEventHandler is defined in C# as:

public delegate void ServiceStateEventHandler(object sender, ServiceStateEventArgs e);

感谢名单读这篇文章：）

Thanx for reading this :)

推荐答案

我刚刚找到答案，这（当然由NISHANT西瓦库玛，人类似乎已经回答我所有的C ++ / CLI互操作相关的问题）：

I just found answer to this(of course by Nishant Sivakumar, man seems to have answers to all my C++/CLI interop related problems):

HTTP：//www.$c$cproject。 COM / KB / MCPP / CppCliSupportLib.aspx？显示=打印

答位于msclr / event.h头，其中定义宏的本机类的代表。

Answer is located in "msclr/event.h" header, where macros for delegates in native classes are defined.

尼什的code为以下内容：

Nish's code is following:

class Demo5
{
msclr::auto_gcroot<FileSystemWatcher^> m_fsw;
public:
// Step (1)
// Declare the delegate map where you map
// native method to specific event handlers

BEGIN_DELEGATE_MAP(Demo5)
    EVENT_DELEGATE_ENTRY(OnRenamed, Object^, RenamedEventArgs^)
END_DELEGATE_MAP()

Demo5()
{
    m_fsw = gcnew  FileSystemWatcher("d:\\tmp");
    // Step (2)
    // Setup event handlers using MAKE_DELEGATE
    m_fsw->Renamed += MAKE_DELEGATE(RenamedEventHandler, OnRenamed);
    m_fsw->EnableRaisingEvents = true;
}
// Step (3)
// Implement the event handler method

void OnRenamed(Object^, RenamedEventArgs^ e)
{
    Console::WriteLine("{0} -> {1}",e->OldName, e->Name);
}
};

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