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 ) );