你可以使用.NET 3.5的行动或Func键为编组非托管的代表？ [英] Can you use .net 3.5 Action or Func as Marshalled unmanaged delegates?

问题描述

看完<一href="http://blogs.msdn.com/jonathanswift/archive/2006/10/03/Dynamically-calling-an-unmanaged-dll-from-.NET-%5F2800%5FC%5F23002900%5F.aspx"相对=nofollow>动态调用.NET

我一直在试图修改code合我的胃口。我做了实现IDisposable包装在负载要求并在需要时释放它们的类。不过，我似乎无法找出语法是否可以使用匿名委托吧。

  VAR加载= DynamicLibraryLoader.TryLoad（的User32.dll）;
变种蜂鸣器= loaded.GetProcAddress（的MessageBeep）;
VAR类型= ty​​peof运算（动作＆LT; UInt32的＆GT;）;
动作＆LT; UInt32的＆GT; beepAction2 =（动作＆LT; UInt32的＆GT;）Marshal.GetDelegateForFunctionPointer（蜂鸣器，类型）;
 

最后一行抛出参数异常说，指定的类型不能为泛型类型定义。有没有解决的办法还是我必须提供一个名为委托做任何非托管？

对于任何有兴趣的，你可以在默认情况下在Windows与非托管code做参考 - 链接（创建快捷方式，动态地加载DLL）

解决方案

由于异常指示，必须在本地函数指针转换为托管code当使用非泛型委托。

After reading Dynamically calling unmanaged dlls in .net

I've been trying to modify the code to my liking. I made a class that implements idisposable to wrap load calls in and free them when needed. However I can't seem to figure out the syntax if it is possible to use anonymous delegates with it.

var loaded=DynamicLibraryLoader.TryLoad("User32.dll");
var beeper=loaded.GetProcAddress("MessageBeep");
var type=typeof(Action<UInt32>);
Action<UInt32> beepAction2=(Action<UInt32>) Marshal.GetDelegateForFunctionPointer(beeper,type);

The last line throws an argument exception saying that the specified Type must not be a generic type definition. Is there a way around this or do I have to provide a named delegate to do anything unmanaged?

For reference of any interested in what you can do by default in windows with unmanaged code - Link (create shortcuts,dynamically load a DLL)

解决方案

As the exception indicates, you must use a non-generic delegate when converting a native function pointer to managed code.

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