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如何：包装本机类以供 C# 使用

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此示例演示如何包装本机 C++ 类，使它可以由使用 C# 或其他 .NET 语言编写的代码使用。

示例

// wrap_native_class_for_mgd_consumption.cpp
// compile with: /clr /LD
#include <windows.h>
#include <vcclr.h>
#using <System.dll>

using namespace System;

class UnmanagedClass {
public:
   LPCWSTR GetPropertyA() { return 0; }
   void MethodB( LPCWSTR ) {}
};

public ref class ManagedClass {
public:
   // Allocate the native object on the C++ Heap via a constructor
   ManagedClass() : m_Impl( new UnmanagedClass ) {}

   // Deallocate the native object on a destructor
   ~ManagedClass() {
      delete m_Impl;
   }

protected:
   // Deallocate the native object on the finalizer just in case no destructor is called
   !ManagedClass() {
      delete m_Impl;
   }

public:
   property String ^  get_PropertyA {
      String ^ get() {
         return gcnew String( m_Impl->GetPropertyA());
      }
   }

   void MethodB( String ^ theString ) {
      pin_ptr<const WCHAR> str = PtrToStringChars(theString);
      m_Impl->MethodB(str);
   }

private:
   UnmanagedClass * m_Impl;
};

另请参阅

使用 C++ 互操作（隐式 PInvoke）