嗨,我是C#和C++編程新手,嘗試在C#項目(.NET 3.5)中使用非託管C++ dll。我被困在這個錯誤上:SafeArrayTypeMismatchException將c#結構傳遞給非託管C++ DLL
System.Runtime.InteropServices.SafeArrayTypeMismatchException:指定的數組不是預期的類型。
下面是DLL
#ifdef FUNCTIONLIB_EXPORTS
#define FUNCTIONLIB_API __declspec(dllexport)
#else
#define FUNCTIONLIB_API __declspec(dllimport)
#endif
typedef struct _FunctionOpt
{
char UserName[32];
char Password[32];
char ServerIP[128];
int ServerPort;
int Index;
char TargetSubChannel;
long Timeout;
char Filepath[256];
bool isFirst;
DWORD SyncTime;
char *pOutBuf;
int OutBufSize;
unsigned short OutImgResW;
unsigned short OutImgResH;
}STFUNCTIONOPT, *PSTFUNCTIONOPT;
FUNCTIONLIB_API int FunctionLib_Snapshot(PSTFUNCTIONOPT pstFunctionOpt);
頭文件我沒有訪問C++代碼,所以我只能改變以下的C#代碼。我的相關代碼如下:
public unsafe struct PSTFUNCTIONOPT
{
public char[] UserName;
public char[] Password;
public char[] ServerIP;
public int ServerPort;
public int Index;
public char TargetSubChannel;
public long Timeout;
public char[] Filepath;
public bool isFirst;
public uint SyncTime;
public char *pOutBuf; // example C++ usage: myStruct.pOutBuf = (char*)malloc(1920 * 1080 * 3);
public int OutBufSize;
public ushort OutImgResW;
public ushort OutImgResH;
}
// need to use dumpbin to get entrypoint name due to c++ mangling
[DllImport(@"C:\Location\To\Project\bin\FunctionLibLib.dll", EntryPoint = "[email protected]@[email protected]@@Z")]
public static extern int FunctionLib_Snapshot(PSTFUNCTIONOPT pstFunctionOpt);
public unsafe int FunctionLib_Run()
{
PSTFUNCTIONOPT stFunctionOpt = new PSTFUNCTIONOPT();
stFunctionOpt.UserName = ("uname").ToCharArray();
stFunctionOpt.Password = ("pword").ToCharArray();
stFunctionOpt.ServerIP = ("192.168.1.1").ToCharArray();
stFunctionOpt.ServerPort = 80;
stFunctionOpt.Index = 255;
stFunctionOpt.Timeout = 15000;
stFunctionOpt.Filepath = ("c:\\temp\\test.jpg").ToCharArray();
stFunctionOpt.isFirst = true;
stFunctionOpt.SyncTime = 0;
//stFunctionOpt.pOutBuf = new char*[10000]; // not sure how to do this yet
stFunctionOpt.OutBufSize = 10000;
// get result from DLL
return FunctionLib_Snapshot(stFunctionOpt);
}
如何正確地將結構傳遞給此非託管DLL?這個錯誤看起來很簡單,但我一直無法縮小這個問題的範圍。任何幫助表示讚賞!