c++和c#数据类型转换

//C#调用C ++的DLL搜集整理的所有数据类型转换方式
//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 + + :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 变量名 - - - - c#:byte 变量名
//c + + :unsigned short 变量名 - - - - c#:ushort 变量名
//c + + :unsigned int 变量名 - - - - c#:uint 变量名
//c + + :unsigned long 变量名 - - - - c#:ulong 变量名


//c + + :char 变量名 - - - - c#:byte 变量名 //C + + 中一个字符用一个字节表示 , C#中一个字符用两个字节表示
//c + + :char 数组名 [ 数组大小 ] - - - - c#:MarshalAs(UnmanagedType . ByValTStr , SizeConst = 数组大小) ] public string 数组名; ushort


//c + + :char * - - - - c#:string //传入参数
//c + + :char * - - - - c#:StringBuilder//传出参数
//c + + :char *变量名 - - - - c#:ref string 变量名
//c + + :char *输入变量名 - - - - c#:string 输入变量名
//c + + :char *输出变量名 - - - - c#: [ MarshalAs(UnmanagedType . LPStr) ] StringBuilder 输出变量名


//c + + :char ** - - - - c#:string
//c + + :char **变量名 - - - - c#:ref string 变量名
//c + + :const char * - - - - c#:string
//c + + :char [ ] - - - - c#:string
//c + + :char 变量名 [ 数组大小 ] - - - - c#: [ MarshalAs(UnmanagedType . ByValTStr , SizeConst=数组大小) ] public string 变量名;


//c + + :struct 结构体名 *变量名 - - - - c#:ref 结构体名 变量名
//c + + :委托 变量名 - - - - c#:委托 变量名


//c + + :int - - - - c#:int
//c + + :int - - - - c#:ref int
//c + + :int & - - - - c#:ref int
//c + + :int * - - - - c#:ref int //C#中调用前需定义int 变量名 = 0;


//c + + :*int - - - - c#:IntPtr
//c + + :int32 PIPTR * - - - - c#:int32 [ ]
//c + + :float PIPTR * - - - - c#:float [ ]



//c + + :double** 数组名 - - - - c#:ref double 数组名
//c + + :double* [ ] 数组名 - - - - c#:ref double 数组名
//c + + :long - - - - c#:int
//c + + :ulong - - - - c#:int

//c + + :UINT8 * - - - - c#:ref byte //C#中调用前需定义byte 变量名 = 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 * 对象名称 - - - - c#:( [ MarshalAs(UnmanagedType . AsAny) ] Object 对象名称


//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


//Struct需要在C#里重新定义一个Struct
//CallBack回调函数需要封装在一个委托里，delegate static extern int FunCallBack(string str);


//unsigned char** ppImage替换成IntPtr ppImage
//int& nWidth替换成ref int nWidth
//int* , int& , 则都可用 ref int 对应
//双针指类型参数，可以用 ref IntPtr
//函数指针使用c + + : typedef double (*fun_type1)(double); 对应 c#:public delegate double fun_type1(double);
//char* 的操作c + + : char*; 对应 c#:StringBuilder;
//c#中使用指针:在需要使用指针的地方 加 unsafe