C#总结（五）调用C++动态库(类型对照)
函数调用导致堆栈不对称。原因可能是托管的PInvoke签名与非托管的目标签名不匹配。 在dllimport中加入CallingConvention参数就行了， [DllImport(PCAP_DLL,CharSet=CharSet.Auto,CallingConvention=CallingConvention.Cdecl)] 要注意C++与NET中数据类型的对应： //c++:char*—-c#:string//传入参数 //c++:char*—-c#:StringBuilder//传出参数 //c++:char*变量名—-c#:refstring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++:SHORT(short)—-c#:System.Int16 //c++:LONG(long)—-c#:System.Int32 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(unsignedchar)—-c#:System.Byte //c++:SHORT(short)—-c#:System.Int16 //c++:WORD(unsignedshort)—-c#:System.UInt16 //c++:INT(int)—-c#:System.Int16 //c++:INT(int)—-c#:System.Int32 //c++:UINT(unsignedint)—-c#:System.UInt16 //c++:UINT(unsignedint)—-c#:System.UInt32 //c++:LONG(long)—-c#:System.Int32 //c++:ULONG(unsignedlong)—-c#:System.UInt32 //c++:DWORD(unsignedlong)—-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(constchar*)—-c#:System.String //c++:LPCWSTR(constwchar_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#:publicstruct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++:unsignedchar—-c#:byte //c++:unsignedchar*—-c#:refbyte //c++:unsignedchar*—-c#:[MarshalAs(UnmanagedType.LPArray)]byte[] //c++:unsignedchar*—-c#:[MarshalAs(UnmanagedType.LPArray)]Intptr //c++:unsignedchar&—-c#:refbyte //c++:unsignedchar变量名—-c#:byte变量名 //c++:unsignedshort变量名—-c#:ushort变量名 //c++:unsignedint变量名—-c#:uint变量名 //c++:unsignedlong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)]publicstring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#:refstring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#:refstring变量名 //c++:constchar*—-c#:string //c++:char[]—-c#:string //c++:char变量名[数组大小]—-c#:[MarshalAs(UnmanagedType.ByValTStr,SizeConst=数组大小)]publicstring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#:refint //c++:int&—-c#:refint //c++:int*—-c#:refint//C#中调用前需定义int变量名=0; //c++:*int—-c#:IntPtr //c++:int32PIPTR*—-c#:int32[] //c++:floatPIPTR*—-c#:float[] //c++:double**数组名—-c#:refdouble数组名 //c++:double*[]数组名—-c#:refdouble数组名 //c++:long—-c#:int //c++:ulong—-c#:int //c++:UINT8*—-c#:refbyte//C#中调用前需定义byte变量名=newbyte(); //c++:handle—-c#:IntPtr //c++:hwnd—-c#:IntPtr //c++:void*—-c#:IntPtr //c++:void*user_obj_param—-c#:IntPtruser_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,shortint,INT16,SHORT—-c#:System.Int16 //c++:int,long,longint,INT32,LONG32,BOOL,INT—-c#:System.Int32 //c++:__int64,INT64,LONGLONG—-c#:System.Int64 //c++:unsignedchar,UINT8,UCHAR,BYTE—-c#:System.Byte //c++:unsignedshort,UINT16,USHORT,WORD,ATOM,WCHAR,__wchar_t—-c#:System.UInt16 //c++:unsigned,unsignedint,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,longdouble,DOUBLE—-c#:System.Double //Win32Types—-CLRType //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，delegatestaticexternintFunCallBack(stringstr); //unsignedchar**ppImage替换成IntPtrppImage //int&nWidth替换成refintnWidth //int*,int&,则都可用refint对应 //双针指类型参数，可以用refIntPtr //函数指针使用c++:typedefdouble(*fun_type1)(double);对应c#:publicdelegatedoublefun_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 //unsignedchar对应publicbyte /* *typedefvoid(*CALLBACKFUN1W)(wchar_t*,void*pArg); *typedefvoid(*CALLBACKFUN1A)(char*,void*pArg); *boolBIOPRINT_SENSOR_APIdllFun1(CALLBACKFUN1pCallbackFun1,void*pArg); *调用方式为 *[UnmanagedFunctionPointer(CallingConvention.Cdecl)] *publicdelegatevoidCallbackFunc1([MarshalAs(UnmanagedType.LPWStr)]StringBuilderstrName,IntPtrpArg); * * */ 作者：章为忠 出处：http://www.fpeach.com/ 本文版权归作者所有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接。如有问题，可以微信：18618243664联系我，非常感谢。扫下面的二维码关注我的微信公众号。
