C#调用C、C++的lib(类型对应) - Thu, Oct 10, 2019
C++,C 与 C# 类型对应
| C++ | C# |
|---|---|
| HANDLE(void *) | System.IntPtr |
| Byte(unsigned char) | System.Byte |
| SHORT(short) | System.Int16 |
| WORD(unsigned short) | System.UInt16 |
| INT(int) | System.Int16 |
| INT(int) | System.Int32 |
| UINT(unsigned int) | System.UInt16 |
| UINT(unsigned int) | System.UInt32 |
| LONG(long) | System.Int32 |
| ULONG(unsigned long) | System.UInt32 |
| DWORD(unsigned long) | System.UInt32 |
| DECIMAL | System.Decimal |
| BOOL(long) | System.Boolean |
| CHAR(char) | System.Char |
| LPSTR(char *) | System.String |
| LPWSTR(wchar_t *) | System.String |
| LPCSTR(const char *) | System.String |
| LPCWSTR(const wchar_t *) | System.String |
| PCAHR(char *) | System.String |
| BSTR | System.String |
| FLOAT(float) | System.Single |
| DOUBLE(double) | System.Double |
| VARIANT | System.Object |
| PBYTE(byte *) | System.Byte[] |
| BSTR | StringBuilder |
| LPCTSTR | StringBuilder |
| LPCTSTR | string |
| LPTSTR | [MarshalAs(UnmanagedType.LPTStr)] string |
| LPTSTR 输出变量名 | StringBuilder 输出变量名 |
| LPCWSTR | IntPtr |
| BOOL | bool |
| HMODULE | IntPtr |
| HINSTANCE | IntPtr |
| 结构体 | public struct 结构体{}; |
| 结构体 **变量名 | out 变量名 //C#中提前申明一个结构体实例化后的变量名 |
| 结构体 &变量名 | ref 结构体 变量名 |
| WORD | ushort |
| DWORD | uint |
| DWORD | int |
| UCHAR | int |
| UCHAR | byte |
| UCHAR* | string |
| UCHAR* | IntPtr |
| GUID | Guid |
| Handle | IntPtr |
| HWND | IntPtr |
| DWORD | int |
| COLORREF | uint |
| unsigned char | byte |
| unsigned char * | ref byte |
| unsigned char * | [MarshalAs(UnmanagedType.LPArray)] byte[] |
| unsigned char * | [MarshalAs(UnmanagedType.LPArray)] Intptr |
| unsigned char & | ref byte |
| unsigned char 变量名 | byte 变量名 |
| unsigned short 变量名 | ushort 变量名 |
| unsigned int 变量名 | uint 变量名 |
| unsigned long 变量名 | ulong 变量名 |
| char 变量名 | 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 |
| char 数组名[数组大小] | MarshalAs(UnmanagedType.ByValTStr, SizeConst = 数组大小)] public string 数组名; ushort |
| char * | string //传入参数 |
| char * | StringBuilder//传出参数 |
| char *变量名 | ref string 变量名 |
| char *输入变量名 | string 输入变量名 |
| char *输出变量名 | [MarshalAs(UnmanagedType.LPStr)] StringBuilder 输出变量名 |
| char ** | string |
| char **变量名 | ref string 变量名 |
| const char * | string |
| char[] | string |
| char 变量名[数组大小] | [MarshalAs(UnmanagedType.ByValTStr,SizeConst=数组大小)] public string 变量名; |
| struct 结构体名 *变量名 | ref 结构体名 变量名 |
| 委托 变量名 | 委托 变量名 |
| int | int |
| int | ref int |
| int & | ref int |
| int * | ref int //C#中调用前需定义int 变量名 = 0; |
| *int | IntPtr |
| int32 PIPTR * | int32[] |
| float PIPTR * | float[] |
| double** 数组名 | ref double 数组名 |
| double*[] 数组名 | ref double 数组名 |
| long | int |
| ulong | int |
| UINT8 * | ref byte //C#中调用前需定义byte 变量名 = new byte(); |
| handle | IntPtr |
| hwnd | IntPtr |
| void * | IntPtr |
| void * user_obj_param | IntPtr user_obj_param |
| void * 对象名称 | [MarshalAs(UnmanagedType.AsAny)]Object 对象名称 |
| char, INT8, SBYTE, CHAR | System.SByte |
| short, short int, INT16, SHORT | System.Int16 |
| int, long, long int, INT32, LONG32, BOOL , INT | System.Int32 |
| __int64, INT64, LONGLONG | System.Int64 |
| unsigned char, UINT8, UCHAR , BYTE | System.Byte |
| unsigned short, UINT16, USHORT, WORD, ATOM, WCHAR , __wchar_t | System.UInt16 |
| unsigned, unsigned int, UINT32, ULONG32, DWORD32, ULONG, DWORD, UINT | System.UInt32 |
| unsigned __int64, UINT64, DWORDLONG, ULONGLONG | System.UInt64 |
| float, FLOAT | System.Single |
| double, long double, DOUBLE | System.Double |
| unsigned char | public byte |
| char* | StringBuilder |
| typedef double (fun_type1)(double) | public delegate double fun_type1(double); |
| 双针指类型参数 | ref IntPtr |
| int*, int& | ref int |
| int& nWidth | ref int nWidth |
| unsigned char** ppImage | IntPtr ppImage |
| Struct | 重新定义一个Struct |
| CallBack回调函数 | delegate static extern int FunCallBack(string str); |
- 公共方法
// __stdcall表示调用约定：参数都是从右向左通过堆栈传递， 函数调用在返回前要由被调用者清理堆栈。
extern “C” __declspec(dllexport) int __stdcall Add(int n1, int n2);
调用方式为
[DllImport(“SampleCppWrapper.dll”)]
private static extern int Add(int n1, int n2);
- 回调函数
typedef void (__stdcall *LoopCallbackWrapper)(void* pContext);
extern "C" __declspec(dllexport) void __stdcall SetCallbackFunc(LoopCallbackWrapper callback);
extern "C" __declspec(dllexport) void __stdcall SetCallbackContext(void* pContext);
extern "C" __declspec(dllexport) void __stdcall Loop();
调用方式为
private delegate void LoopCallbackHandler(IntPtr pContext);
private static LoopCallbackHandler callback = LoopCallback;
[DllImport("SampleCppWrapper.dll")]
private static extern void SetCallbackFunc(LoopCallbackHandler callback);
[DllImport("SampleCppWrapper.dll")]
private static extern void SetCallbackContext(IntPtr pContext);
[DllImport("SampleCppWrapper.dll")]
private static extern void Loop();