将嵌套结构从 C# 编组到C++ DLL
Marshalling nested struct from C# to C++ DLL
我正在尝试将一个函数从 C# 调用到用 Borland 编写的.DLL C++其签名为:
extern "C" __declspec(dllexport) ls50errortype __stdcall Ls50P2Open(ls50p2apiconfiginfostruct &configinfo);
C# 中的相应调用:
[DllImport("C:\Lumistar\LDPS_8x\Ls50P2_Dll.dll", EntryPoint = "Ls50P2Open", CallingConvention = System.Runtime.InteropServices.CallingConvention.StdCall, CharSet = CharSet.Ansi, SetLastError = true)]
public static extern void Ls50P2Open(ref ls50p2apiconfiginfostruct configinfo);
感兴趣的结构(ls50p2apiconfiginfostruct)由嵌套结构和枚举(从C++标头复制):
typedef enum
{
MFMODEL_LS50P1,
MFMODEL_4422PCI,
MFMODEL_LS50P2,
MFMODEL_LS70P2,
MFMODEL_LS5070,
MFMODEL_LAST
}ecardmodel;
typedef enum
{
CHANNELDEVICE_NONE,
CHANNELDEVICE_50,
CHANNELDEVICE_70,
CHANNELDEVICE_LAST
}ls50p2channeldevicetype;
typedef enum
{
LS50V2DCARD_NONE,
LS50V2DCARD_40V1_10,
LS50V2DCARD_40V1_20,
LS50V2DCARD_40V2_10,
LS50V2DCARD_40V2_20,
LS50V2DCARD_38,
LS50V2DCARD_LAST
}ls50p2daughtercardtype;
typedef struct
{
bool HasDaughterCard;
ls50p2daughtercardtype DCardType;
bool SpecialStatusCapable;
int MaxBitsyncInputs;
bool HasBitsyncConfidenceLevel;
bool HasBitsync2ndCh;
bool SpecialStatusCapable2ndCh;
bool HasBitsyncConfidenceLevel2ndCh;
ls50p2daughtercardtype DCardType2ndCh;
int MaxBitsyncInputs2ndCh;
}ls50p2daughtercardinfostruct;
typedef struct
{
ecardmodel DeviceModel;
ls50p2channeldevicetype ChannelDataTypeAry[2];
ls50p2daughtercardinfostruct DaughterCardInfo;
bool HasExtendedBertPatterns;
int FirmwareVersionAry[2];
int NumPremodFiltersAry[2];
double Ls50SimPreModFilterKhzAry[2][LS50V2_MAX50SIMPREMODFILTERS];
double Ls50SimMinFmDeviationKhzAry[2];
double Ls50SimMaxFmDeviationKhzAry[2];
}ls50p2cardconfigstruct;
typedef struct
{
unsigned char *DataBuf;
HANDLE hNewDataRdy;
DWORD MaxBufLength;
DWORD CurrentBufLength;
int NumHeaderBytes;
}ls50p2carddatastruct;
typedef struct
{
ls50p2cardconfigstruct CardConfigInfo[MAXMFCARDS];
int Ls50P2CardCount;
ls50p2carddatastruct DataInfo[MAXMFCARDS][2];
}ls50p2apiconfiginfostruct;
下面是 C# 中的相应结构:
public enum ecardmodel
{
MFMODEL_LS50P1,
MFMODEL_4422PCI,
MFMODEL_LS50P2,
MFMODEL_LS70P2,
MFMODEL_LS5070,
MFMODEL_LAST
}
public enum ls50p2channeldevicetype
{
CHANNELDEVICE_NONE,
CHANNELDEVICE_50,
CHANNELDEVICE_70,
CHANNELDEVICE_LAST
};
public enum ls50p2daughtercardtype
{
LS50V2DCARD_NONE,
LS50V2DCARD_40V1_10,
LS50V2DCARD_40V1_20,
LS50V2DCARD_40V2_10,
LS50V2DCARD_40V2_20,
LS50V2DCARD_38,
LS50V2DCARD_LAST
}
[StructLayout(LayoutKind.Sequential)]
public struct ls50p2daughtercardinfostruct
{
public bool HasDaughterCard;
public ls50p2daughtercardtype DCardType;
public bool SpecialStatusCapable;
public int MaxBitsyncInputs;
public bool HasBitsyncConfidenceLevel;
public bool HasBitsync2ndCh;
public bool SpecialStatusCapable2ndCh;
public bool HasBitsyncConfidenceLevel2ndCh;
public ls50p2daughtercardtype DCardType2ndCh;
public int MaxBitsyncInputs2ndCh;
}
[StructLayout(LayoutKind.Sequential)]
public struct ls50p2cardconfigstruct
{
public ecardmodel DeviceModel;
public ls50p2daughtercardtype[] ChannelDataTypeAry;
public ls50p2daughtercardinfostruct DaughterCardInfo;
public bool HasExtendedBertPatterns;
public int[] FirmwareVersionAry;
public int[] NumPremodFiltersAry;
public double[] Ls50SimPreModFilterKhzAry;
public double[] Ls50SimMinFmDeviationKhzAry;
public double[] Ls50SimMaxFmDeviationKhzAry;
}
[StructLayout(LayoutKind.Sequential)]
public struct ls50p2carddatastruct
{
public StringBuilder DataBuf;
public IntPtr hNewDataRdy;
public uint MaxBufLength;
public uint CurrentBufLength;
public int NumHeaderBytes;
}
[StructLayout(LayoutKind.Sequential)]
public struct ls50p2apiconfiginfostruct
{
public ls50p2cardconfigstruct[] CardConfigInfo;
public int Ls50P2CardCount;
public ls50p2carddatastruct[,] DataInfo;
}
下面是我用来调用函数的 C# 代码:
ls50p2apiconfiginfostruct lscfg = new ls50p2apiconfiginfostruct();
lscfg.CardConfigInfo = new ls50p2cardconfigstruct[8];
for (int i = 0; i < 8; i++)
{
lscfg.CardConfigInfo[i].ChannelDataTypeAry = new ls50p2daughtercardtype[2];
}
lscfg.DataInfo = new ls50p2carddatastruct[8, 2];
Ls50P2Open(ref lscfg);
我尝试过在 C# 中制作这个结构,但我没有取得多大成功(枚举、2D 数组、固定大小的缓冲区的问题)。在 C# 中创建此结构的正确方法是什么?这是否需要在不安全的环境中进行?
现在由于某种原因,我在运行代码时收到以下错误:
An unhandled exception of type 'System.Runtime.InteropServices.COMException' occurred in Library.dll Additional information: Old format or invalid type library. (Exception from HRESULT: 0x80028019 (TYPE_E_UNSUPFORMAT))
C# 结构是什么样的。您是否正在使用 StructLayoutAttribute?http://msdn.microsoft.com/en-us/library/system.runtime.interopservices.structlayoutattribute.aspx
您可以将它与选项顺序一起使用,因此您只需按正确的顺序用字段填充 c# 结构即可。
我相信
数组问题在这里或多或少得到了解答;不正确的封送处理:C# 数组到C++非托管数组
接受的答案显示了如何安全地封送动态分配的数组。
至于枚举,它们应该不会造成任何问题,有一个干净的 1:1 映射。事实上,我会按照这篇 msdn 帖子中的描述进行操作;http://blogs.msdn.com/b/abhinaba/archive/2007/08/27/sharing-enums-across-c-and-c.aspx
您可以简单地在.cs文件中定义所有枚举,然后将其包含在两个项目中,一切都会正常工作。
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