将非托管C ++方法传递给C＃dll以进行回调 [英] pass unmanaged C++ method to C# dll for callback

问题描述

我有一个.Net DLL，我已经注册，并能够从我的C＃代码调用方法。
我基本上遵循了本教程： http://support.microsoft.com/kb/828736

现在我需要在c＃中异步地做一些事情，所以我需要一些告诉c ++代码的方法。

我已经创建了一个这样的方法：

  public void Init （字符串服务器，IntPtr回调）; 
  

我可以在c ++中看到：

  Init（BSTR server，long callback）; 
  

当我调用它时，我还需要将一个变量传递回c ++代码。 >

基本上，我有一个事件在C＃代码中被触发，我需要c ++代码来处理它，包括事件args。

我很高兴自己做阅读，但我根本找不到任何东西。我看到一些关于Windows事件的事情...这里
http://msdn.microsoft.com/en-us/library/windows/desktop/aa385771（v = vs.85）.aspx

但我们没有使用任何窗口标题，我不认为，我不想添加所有这些东西，如果有一个更简单的方法这样做。

谢谢您阅读！

解决方案

好吧，比我想象的容易，但看起来像巫毒我...

基本上在c ++中添加

  void CALLBACK CppCallbackc（）
 {
 std :: cout<< 测试; 
} 
  

然后在c＃add

  public delegate void CppCallback（）; 
  

，当您要启动它时，

  Marshal.GetDelegateForFunctionPointer（cppCallback，typeof（CppCallback））。DynamicInvoke（null）; 
  

I have a .Net dll which I have registered and am able to call methods on from my C# code. I essentially followed this tutorial: http://support.microsoft.com/kb/828736

now I need to do something in c# asynchronously, so I need some way of telling the c++ code that I am done.

I have created a method like so:

public void Init(string server, IntPtr callback); 

which I can see in the c++ as:

Init(BSTR server, long callback);

I also need to pass a variable back to the c++ code when I make invoke it.

basically, I have an event that's getting fired in the C# code and I need the c++ code to handle it, including the event args.

I am glad to do the reading myself, but I am not able to find anything at all. I did see some stuff about windows events... here http://msdn.microsoft.com/en-us/library/windows/desktop/aa385771(v=vs.85).aspx

but we aren't using any windows headers I don't think and I didn't want to add all this stuff if there is a simpler way of doing this.

Thank you for reading!

解决方案

okay it's easier than I thought, but it seems like voodoo to me...

basically in the c++ add

void CALLBACK CppCallbackc()
{
    std::cout << "test";
}

then in the c# add

public delegate void CppCallback();

and when you want to fire it,

Marshal.GetDelegateForFunctionPointer(cppCallback, typeof(CppCallback)).DynamicInvoke(null);

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