C#引用 C/C++ Dll 所有變數(型態)類型轉換的方式

資料來源: https://dotblogs.com.tw/merlin/2012/07/17/73424

code

//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);
 * 
 * 
*/