C#调用C++的DLL 数据类型对应关系

//C++中的DLL函数原型为
//extern “C” __declspec(dllexport) bool 方法名一(const char* 变量名1, unsigned char* 变量名2)
//extern “C” __declspec(dllexport) bool 方法名二(const unsigned char* 变量名1, char* 变量名2)

//C#调用C++的DLL搜集整理的所有数据类型转换方式,可能会有重复或者多种方案,自己多测试
//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 输出变量名    —-    c#:StringBuilder 输出变量名
//c++:LPCWSTR   —-    c#:IntPtr
//c++:BOOL      —-    c#:bool
//c++:HMODULE   —-    c#:IntPtr
//c++:HINSTANCE —-    c#:IntPtr
//c++:结构体    —-    c#:public struct 结构体{};
//c++:结构体 **变量名   —-    c#:out 变量名   //C#中提前申明一个结构体实例化后的变量名
//c++:结构体 &变量名    —-    c#:ref 结构体 变量名
//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 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

//Win32 Types        —-  CLR Type
//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

//unsigned   char对应public   byte
/*
* typedef void (*CALLBACKFUN1W)(wchar_t*, void* pArg);
* typedef void (*CALLBACKFUN1A)(char*, void* pArg);
* bool BIOPRINT_SENSOR_API dllFun1(CALLBACKFUN1 pCallbackFun1, void* pArg);
* 调用方式为
* [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
* public delegate void CallbackFunc1([MarshalAs(UnmanagedType.LPWStr)] StringBuilder strName, IntPtr pArg);
*
*
*/