C#引用C++ Dll 所有類型轉換的方式

//C++中的DLL函數原型為

//extern "C" __declspec(dllexport) bool 方法名一(const char* 變量名1, unsigned char* 變量名2)

//extern "C" __declspec(dllexport) bool 方法名二(const unsigned char* 變量名1, char* 變量名2)

//C#調用C++的DLL搜集整理的所有數據類型轉換方式,可能會有重復或者多種方案,自己多測試

//c++:HANDLE(void *) ---- c#:System.IntPtr

//c++:Byte(unsigned char) ---- c#:System.Byte

//c++:SHORT(short) ---- c#:System.Int16

//c++:WORD(unsigned short) ---- c#:System.UInt16

//c++:INT(int) ---- c#:System.Int16

//c++:INT(int) ---- c#:System.Int32

//c++:UINT(unsigned int) ---- c#:System.UInt16

//c++:UINT(unsigned int) ---- c#:System.UInt32

//c++:LONG(long) ---- c#:System.Int32

//c++:ULONG(unsigned long) ---- c#:System.UInt32

//c++:DWORD(unsigned long) ---- c#:System.UInt32

//c++:DECIMAL ---- c#:System.Decimal

//c++:BOOL(long) ---- c#:System.Boolean

//c++:CHAR(char) ---- c#:System.Char

//c++:LPSTR(char *) ---- c#:System.String

//c++:LPWSTR(wchar_t *) ---- c#:System.String

//c++:LPCSTR(const char *) ---- c#:System.String

//c++:LPCWSTR(const wchar_t *) ---- c#:System.String

//c++:PCAHR(char *) ---- c#:System.String

//c++:BSTR ---- c#:System.String

//c++:FLOAT(float) ---- c#:System.Single

//c++:DOUBLE(double) ---- c#:System.Double

//c++:VARIANT ---- c#:System.Object

//c++:PBYTE(byte *) ---- c#:System.Byte[]

//c++:BSTR ---- c#:StringBuilder

//c++:LPCTSTR ---- c#:StringBuilder

//c++:LPCTSTR ---- c#:string

//c++:LPTSTR ---- c#:[MarshalAs(UnmanagedType.LPTStr)] string

//c++:LPTSTR 輸出變量名 ---- c#:StringBuilder 輸出變量名

//c++:LPCWSTR ---- c#:IntPtr

//c++:BOOL ---- c#:bool

//c++:HMODULE ---- c#:IntPtr

//c++:HINSTANCE ---- c#:IntPtr

//c++:結構體 ---- c#:public struct 結構體{};

//c++:結構體 **變量名 ---- c#:out 變量名 //C#中提前申明一個結構體實例化後的變量名

//c++:結構體 &變量名 ---- c#:ref 結構體 變量名

//c++:WORD ---- c#:ushort

//c++:DWORD ---- c#:uint

//c++:DWORD ---- c#:int

//c++:UCHAR ---- c#:int

//c++:UCHAR ---- c#:byte

//c++:UCHAR* ---- c#:string

//c++:UCHAR* ---- c#:IntPtr

//c++:GUID ---- c#:Guid

//c++:Handle ---- c#:IntPtr

//c++:HWND ---- c#:IntPtr

//c++:DWORD ---- c#:int

//c++:COLORREF ---- c#:uint

//c++:unsigned char ---- c#:byte

//c++:unsigned char * ---- c#:ref byte

//c++:unsigned char * ---- c#:[MarshalAs(UnmanagedType.LPArray)] byte[]

//c++:unsigned char * ---- c#:[MarshalAs(UnmanagedType.LPArray)] Intptr

//c++:unsigned char & ---- c#:ref byte

//c++:unsigned char 變量名 ---- c#:byte 變量名

//c++:unsigned short 變量名 ---- c#:ushort 變量名

//c++:unsigned int 變量名 ---- c#:uint 變量名

//c++:unsigned long 變量名 ---- c#:ulong 變量名

//c++:char 變量名 ---- c#:byte 變量名 //C++中一個字符用一個字節表示,C#中一個字符用兩個字節表示

//c++:char 數組名[數組大小] ---- c#:MarshalAs(UnmanagedType.ByValTStr, SizeConst = 數組大小)] public string 數組名; ushort

//c++:char * ---- c#:string //傳入參數

//c++:char * ---- c#:StringBuilder//傳出參數

//c++:char *變量名 ---- c#:ref string 變量名

//c++:char *輸入變量名 ---- c#:string 輸入變量名

//c++:char *輸出變量名 ---- c#:[MarshalAs(UnmanagedType.LPStr)] StringBuilder 輸出變量名

//c++:char ** ---- c#:string

//c++:char **變量名 ---- c#:ref string 變量名

//c++:const char * ---- c#:string

//c++:char[] ---- c#:string

//c++:char 變量名[數組大小] ---- c#:[MarshalAs(UnmanagedType.ByValTStr,SizeConst=數組大小)] public string 變量名;

//c++:struct 結構體名 *變量名 ---- c#:ref 結構體名 變量名

//c++:委托 變量名 ---- c#:委托 變量名

//c++:int ---- c#:int

//c++:int ---- c#:ref int

//c++:int & ---- c#:ref int

//c++:int * ---- c#:ref int //C#中調用前需定義int 變量名 = 0;

//c++:*int ---- c#:IntPtr

//c++:int32 PIPTR * ---- c#:int32[]

//c++:float PIPTR * ---- c#:float[]

//c++:double** 數組名 ---- c#:ref double 數組名

//c++:double*[] 數組名 ---- c#:ref double 數組名

//c++:long ---- c#:int

//c++:ulong ---- c#:int

//c++:UINT8 * ---- c#:ref byte //C#中調用前需定義byte 變量名 = new byte();

//c++:handle ---- c#:IntPtr

//c++:hwnd ---- c#:IntPtr

//c++:void * ---- c#:IntPtr

//c++:void * user_obj_param ---- c#:IntPtr user_obj_param

//c++:void * 對象名稱 ---- c#:([MarshalAs(UnmanagedType.AsAny)]Object 對象名稱

//c++:char, INT8, SBYTE, CHAR ---- c#:System.SByte

//c++:short, short int, INT16, SHORT ---- c#:System.Int16

//c++:int, long, long int, INT32, LONG32, BOOL , INT ---- c#:System.Int32

//c++:__int64, INT64, LONGLONG ---- c#:System.Int64

//c++:unsigned char, UINT8, UCHAR , BYTE ---- c#:System.Byte

//c++:unsigned short, UINT16, USHORT, WORD, ATOM, WCHAR , __wchar_t ---- c#:System.UInt16

//c++:unsigned, unsigned int, UINT32, ULONG32, DWORD32, ULONG, DWORD, UINT ---- c#:System.UInt32

//c++:unsigned __int64, UINT64, DWORDLONG, ULONGLONG ---- c#:System.UInt64

//c++:float, FLOAT ---- c#:System.Single

//c++:double, long double, DOUBLE ---- c#:System.Double

//Win32 Types ---- CLR Type

//Struct需要在C#裏重新定義一個Struct

//CallBack回調函數需要封裝在一個委托裏，delegate static extern int FunCallBack(string str);

//unsigned char** ppImage替換成IntPtr ppImage

//int& nWidth替換成ref int nWidth

//int*, int&, 則都可用 ref int 對應

//雙針指類型參數，可以用 ref IntPtr

//函數指針使用c++: typedef double (*fun_type1)(double); 對應 c#:public delegate double fun_type1(double);

//char* 的操作c++: char*; 對應 c#:StringBuilder;

//c#中使用指針:在需要使用指針的地方 加 unsafe

//unsigned char對應public byte

/*

* typedef void (*CALLBACKFUN1W)(wchar_t*, void* pArg);

* typedef void (*CALLBACKFUN1A)(char*, void* pArg);

* bool BIOPRINT_SENSOR_API dllFun1(CALLBACKFUN1 pCallbackFun1, void* pArg);

* 調用方式為

* [UnmanagedFunctionPointer(CallingConvention.Cdecl)]

* public delegate void CallbackFunc1([MarshalAs(UnmanagedType.LPWStr)] StringBuilder strName, IntPtr pArg);

*

*

*/

转自：http://www.dotblogs.com.tw/merlin/archive/2012/07/17/73424.aspx