CLR 与 C++的常用类型转换笔记

 

1. System::String 转换到 const wchar_t*

 

   1:  const wchar_t* ToUnmanagedUnicode( System::String^ str )

   2:  {

   3:      pin_ptr<const WCHAR> nativeString1  = PtrToStringChars( str );

   4:      return (const wchar_t*)nativeString1;

   5:  }

 

2.  const wchar_t* / const char* 转换到 System::String

   1:  const wchar_t* p= L"hello";

   2:   

   3:  System::String( p ).ToString();

 

3.  C++数值类型转CLR数值类型

   1:  int a;

   2:   

   3:  System::Int32 b = System::Int32( a );

 

4. HWND 转为IWin32Window

   1:  public ref class WindowWrapper : System::Windows::Forms::IWin32Window

   2:  {

   3:      public: WindowWrapper(IntPtr handle)

   4:      {

   5:          _hwnd = handle;

   6:      }

   7:   

   8:  public:

   9:      property IntPtr Handle

  10:      {

  11:          virtual IntPtr get(void){return _hwnd;};

  12:      };

  13:   

  14:      private: IntPtr _hwnd;

  15:  };

  16:   

  17:  HWND nativehwnd;

  18:  IWin32Window^ w = gcnew Managed::WindowWrapper( System::IntPtr( nativehwnd ) );