Int型傳入：
Dll端：
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extern "C" __declspec(dllexport) int Add(int a, int b) { return a+b; } |
C#端：
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[DllImport("aeClient2.0.dll", CallingConvention =CallingConvention.Cdecl)] public static extern unsafe int Add(int a, int b); |
Int型傳入傳出：
Dll端：
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extern "C" __declspec(dllexport) int Add(int *a, int* b) { *a = 2; *b = 3; return add(2, 3); } |
C#端
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[DllImport("aeClient2.0.dll", CallingConvention =CallingConvention.Cdecl)] public static extern unsafe int Add(int a, int b); |
String傳入：
Dll端：
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extern "C" __declspec(dllexport) BOOL sendMessage(char* msg) { CString str = msg; ::AfxMessageBox(str.GetBuffer(0)); return 3; } |
C#端：
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[DllImport("aeClient1.1.dll", CallingConvention =CallingConvention.Cdecl)] public static extern int sendMessage(string msg);
string strin = "llqq哈t哈t哈t呵?呵?"; sendMessage(strin); |
String型傳入傳出：
Dll端：
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extern "C" __declspec(dllexport) BOOL GetErrorMessage(char *szErrorMessage ) { CString str = szErrorMessage; AfxMessageBox(str); char tmp[] = "nm世界和平nmnm"; strcpy(szErrorMessage,tmp); return 3; } |
C#端：
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[DllImport("aeClient1.1.dll", CallingConvention =CallingConvention.Cdecl)] public static extern int GetErrorMessage(StringBuilder msg);
StringBuilder buf = new StringBuilder(1024);//指定的buf大小必須大於傳入的字符長度 buf.Append("abc中國人"); int outdata = GetErrorMessage(buf, 1); string strout = buf.ToString(); |
結構體傳入：
Dll端：
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class NET_INFO_STRUCT { public: DWORD nDurationTime; //持?續?時º¡À間? double nReceiveByte; //接¨®收º?字Á?節¨² double nSendByte; //發¤¡é送¨ª字Á?節¨² WORD word; char buf[200]; FILETIME time; }; extern "C" __declspec(dllexport) BOOL NetGetConnectDetail(NET_INFO_STRUCT lpNetInfo) { ::AfxMessageBox(lpNetInfo.buf); return 3; }
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C#端
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public struct FILETIME { public uint high; public uint low; } public struct NET_INFO_STRUCT { public uint nDurationTime; //持?續?時º¡À間? public double nReceiveByte; //接¨®收º?字Á?節¨² public double nSendByte; //發¤¡é送¨ª字Á?節¨² public ushort ush; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 200)] public string str; public FILETIME time; } ; [DllImport("aeClient1.1.dll", CallingConvention =CallingConvention.Cdecl)] public static extern unsafe int NetGetConnectDetail(NET_INFO_STRUCT lpNetInfo);
NET_INFO_STRUCT stru = new NET_INFO_STRUCT(); stru.nDurationTime = 8989; stru.nReceiveByte = 89.89; stru.nSendByte = 89.8900; stru.ush = 56; stru.str = "來來去去ypfisja"; stru.time.high = 24; stru.time.low = 17; NetGetConnectDetail(stru); |
結構體數組傳出：
Dll端：
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struct UIM_BOOK_STRUCT { int UimIndex; char szName[15]; char szPhone[21]; }; extern "C" __declspec(dllexport) int ReadUimAllBook(UIM_BOOK_STRUCT lpUimBookItem[],int nMaxArraySize) { lpUimBookItem[0].UimIndex = 345; strcpy(lpUimBookItem[0].szName , "dsd"); strcpy(lpUimBookItem[0].szPhone , "bbbb");
lpUimBookItem[1].UimIndex = 111; strcpy(lpUimBookItem[1].szName , "ddddd"); strcpy(lpUimBookItem[1].szPhone , "vvvvvv");
lpUimBookItem[2].UimIndex = 2222; strcpy(lpUimBookItem[2].szName , "d3343434sd"); strcpy(lpUimBookItem[2].szPhone , "bbbfggfggggfgb");
return 4; } |
C#端：
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[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)] public struct UIM_BOOK_STRUCT { public int UimIndex; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 15)] public string szName; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 21)] public string szPhone; }; [DllImport("aeClient1.1.dll", CallingConvention =CallingConvention.Cdecl)] public static extern unsafe int ReadUimAllBook([Out] UIM_BOOK_STRUCT[] lpUimBookItem, int nMaxArraySize);
UIM_BOOK_STRUCT[] p = new UIM_BOOK_STRUCT[20]; int rets = ReadUimAllBook(p, p.Length); |
回調函數傳遞字符串：
Dll端：
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typedef int (*pfCallBack)(int a, char b[]); pfCallBack CallBackfun = NULL;
extern "C" __declspec(dllexport) void SetCB(int (*pfCallBack)(int a, char b[])) { CallBackfun = pfCallBack; } char ch[100]; extern "C" __declspec(dllexport) void callTheCB() { int a = 4; memset(ch, '\0', 100); strcpy(ch, "aabbcc"); CallBackfun(a, ch); } |
C#端
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//定¡§義°?一°?個?委¡¥託ªD，ê?其?返¤¦Ì回?類¤¨¤型¨ª和¨ª形?參?與®?方¤?法¤¡§體¬?的Ì?返¤¦Ì回?類¤¨¤型¨ª形?參?一°?致? [UnmanagedFunctionPointer(CallingConvention.Cdecl)]//一°?定¡§要°a加¨®上¦?這a句?，ê?要°a不?然¨?C#中D的Ì?回?調Ì¡Â函¡¥數ºy只?要°a被À?調Ì¡Â用®?一°?次ä?，ê?程¨¬序¨°就¨ª異°¨¬常¡ê退ª?出?了¢?！ê?！ê?！ê? public delegate int callBackHandler(int a, [MarshalAs(UnmanagedType.LPStr)]StringBuilder b); callBackHandler fun;//聲¦¨´明¡Â一°?個?委¡¥託ªD變À?量¢? [DllImport("xxx.dll", CallingConvention =CallingConvention.Cdecl)] public static extern unsafe void SetCB(callBackHandler fun1); [DllImport("xxx.dll", CallingConvention =CallingConvention.Cdecl)] public static extern unsafe void callTheCB();
int localFun(int a, [MarshalAs(UnmanagedType.LPStr)]StringBuilder b) { MessageBox.Show(b.ToString()); return 0; }
fun = new callBackHandler(localFun);//給?委¡¥託ªD變À?量¢?賦3值¦Ì SetCB(fun);//用®?委¡¥託ªD當Ì¡À做Á?函¡¥數ºy指?針?作Á¡Â爲a參?數ºy傳ä?入¨? callTheCB(); |
回調函數傳遞結構體：
Dll端：
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struct REvent { REvent(ONEVENTSTRUCT* pEVENTSTRUCT); WORD m_ChangeMask; WORD m_State; char m_Source[200]; };
typedef void (*pfCallBackEvent)(REvent eve/*, char m_Source[]*/); pfCallBackEvent CallBackfunEvent = NULL; extern "C" __declspec(dllexport) void SetCBEvent(void (*pfCallBackEvent)(REvent eve/*, char m_Source[]*/)) { CallBackfunEvent = pfCallBackEvent; } void callCBEvent(REvent eve/*, char m_Source[]*/) { CallBackfunEvent(eve/*, m_Source*/); }
//調用回調函數 callCBEvent(*pREvent/*, pEvent->m_Message.GetBuffer(0)*/); |
C#端：
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[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)] public struct REvent { public ushort m_ChangeMask; public ushort m_State; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 200)] public string m_Source; };
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]//可¨¦以°?指?定¡§編À¨¤碼?類¤¨¤型¨ª public struct EventSourceTag { //[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 200)] public IntPtr name; }; //定¡§義°?一°?個?委¡¥託ªD，ê?其?返¤¦Ì回?類¤¨¤型¨ª和¨ª形?參?與®?方¤?法¤¡§體¬?的Ì?返¤¦Ì回?類¤¨¤型¨ª形?參?一°?致? [UnmanagedFunctionPointer(CallingConvention.Cdecl, CharSet = CharSet.Ansi)]//一°?定¡§要°a加¨®上¦?這a句?，ê?要°a不?然¨?C#中D的Ì?回?調Ì¡Â函¡¥數ºy只?要°a被À?調Ì¡Â用®?一°?次ä?，ê?程¨¬序¨°就¨ª異°¨¬常¡ê退ª?出?了¢?！ê?！ê?！ê? public delegate void CBEventHandle(REvent eve/*, [MarshalAs(UnmanagedType.LPStr)]StringBuilder source*/); CBEventHandle cbFun;//聲¦¨´明¡Â一°?個?委¡¥託ªD變À?量¢? [DllImport("xxx.dll", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)] public static extern unsafe void SetCBEvent(CBEventHandle fun);
void CBEvent(REvent eve/*, [MarshalAs(UnmanagedType.LPStr)]StringBuilder source*/) { //string str = Marshal.PtrToStringAnsi(source); //string str = System.Text.Encoding.Default.GetString(source); MessageBox.Show(eve.m_Message.ToString()); }
cbFun = new CBEventHandle(CBEvent); SetCBEvent(cbFun); |