如何通过Visual Studio COM包装器（或其他方式）在C＃中使用C++ property union

我试图与使用制造商提供的com/dlls（用C++编写）的设备交谈，但是我遇到问题，我无法设置结构中的字段的值。如何通过Visual Studio COM包装器（或其他方式）在C＃中使用C++ property union

在C++中，这个结构实现像这样根据所提供的文件：

typedef struct tagFCITEST 
{ 
    FCITESTTYPE TestType; 
    [switch_type(FCITESTTYPE), switch_is(TestType)] 
    union 
    { 
    [case(FCI_TYPE_PROPORTIONAL)] FCI_TEST_PROPORTIONAL Test; 
    [case(FCI_TYPE_SWITCH)] FCI_TEST_SWITCH SwitchTest; 
    [default]; 
    }; 
} FCITEST;

然而，当我“转到定义”在Visual Studio中，以下是我发现：

public struct tagFCITEST 
{ 
    public __MIDL___MIDL_itf_mftFCINTF_0209_0005 __MIDL_0022; 
    public tagFCITESTTTYPE TestType; 
}

和

public struct __MIDL___MIDL_itf_mftFCINTF_0209_0005 
{ 
}

显然C＃不支持这些类型的工会，它看起来像六创建一个包装时，西伯利亚乌拉尔铝业公司影楼搞砸了，所以我尝试了以下解决这个问题：

public struct tagFCITEST 
    { 
     public MFTFCINTFLib.tagFCITESTTTYPE TestType; 
     public __MIDL___MIDL_itf_mftFCINTF_0209_0005 __MIDL_0022; 
    } 

    [StructLayout(LayoutKind.Explicit)] 
    public struct __MIDL___MIDL_itf_mftFCINTF_0209_0005 
    { 
     [FieldOffset(0)] 
     public MFTFCINTFLib.tagFCI_TEST_PROPORTIONAL Test; 
     [FieldOffset(0)] 
     public MFTFCINTFLib.tagFCI_TEST_SWITCH SwitchTest; 
    }

，如果我用我的自定义结构的方法调用，编译器不开心，并告诉我，有一个无效arguement 。即使我要创建自定义方法签名：

[DllImport("mftFCINTF.dll")] 
    public static extern void DownloadTag(int ISessionID, 
     string szwDeviceTag, 
     string szwDeviceSeriaINum, 
     ref MFTFCINTFLib.tagFCICOMMDEF pCommDef, 
     ref MFTFCINTFLib.tagFCIDEVIN pInputDef, 
     ref MFTFCINTFLib.tagFCIDEVOUT pOutputDef, 
     ref MFTFCINTFLib.tagFCIDEVRELATION pRelationDef, 
     ref tagFCITEST pTestDef,  // This is the changed line 
     string szwSetupInstructions, 
     string szwCleanupInstructions, 
     out string pszwLocationInCalibrator, 
     out MFTFCINTFLib.tagFCISTATUS pStatus);

不使用签名。有没有办法来修改Visual Studio的包装器的实现？或者也许有更好的方法去解决这个问题？

谢谢！

编辑：

这里的生成.idl文件

// Generated .IDL file (by the OLE/COM Object Viewer) 
// 
// typelib filename: mftFCINTF.dll 

[ 
    uuid(C81FC550-84AC-437B-AD0E-DA283ACE4687), 
    version(1.0), 
    helpstring("mftFCINTF 1.0 Type Library"), 
    custom(DE77BA64-517C-11D1-A2DA-0000F8773CE9, 83951780), 
    custom(DE77BA63-517C-11D1-A2DA-0000F8773CE9, 1058814716) 

] 
library MFTFCINTFLib 
{ 
    // TLib :  // TLib : OLE Automation : {00020430-0000-0000-C000-000000000046} 
    importlib("stdole2.tlb"); 

    // Forward declare all types defined in this typelib 
    interface ICalibratorInfo; 
    interface ICalibratorDownload; 
    interface ICalibratorUpload; 
    interface IConfigurator; 

    [ 
     uuid(34E98744-678E-4D9A-B57F-6A96521BB609), 
     helpstring("MFT 1.0 by Meriam Process Technologies") 
    ] 
    coclass mftFCI { 
     [restricted] interface ICalibratorInfo; 
     [restricted] interface ICalibratorDownload; 
     [restricted] interface ICalibratorUpload; 
     [restricted] interface IConfigurator; 
    }; 

    [ 
     odl, 
     uuid(FF5EFD41-7B15-11D1-B326-00001CBE02AA), 
     version(1.0), 
     helpstring("ICalibratorInfo Interface") 
    ] 
    interface ICalibratorInfo : IUnknown { 
     HRESULT _stdcall DriverProperties([out] tagFCISTATUS* pStatus); 
     HRESULT _stdcall Open(
         [in] int nPortNumber, 
         [out] long* plSessionId, 
         [out] long* plCapabilities, 
         [out] tagFCISTATUS* pStatus); 
     HRESULT _stdcall Close(
         [in] long lSessionId, 
         [out] tagFCISTATUS* pStatus); 
     HRESULT _stdcall Properties(
         [in] long lSessionId, 
         [out] tagFCISTATUS* pStatus); 
     HRESULT _stdcall GetId(
         [in] long lSessionId, 
         [out] LPWSTR* pszwCalManufacturer, 
         [out] LPWSTR* pszwCalModel, 
         [out] LPWSTR* pszwCalSerialNum, 
         [out] tagFCISTATUS* pStatus); 
     HRESULT _stdcall GetCalDates(
         [in] long lSessionId, 
         [out] _SYSTEMTIME* pLastCalDate, 
         [out] _SYSTEMTIME* pNextCalDueDate, 
         [out] tagFCISTATUS* pStatus); 
     HRESULT _stdcall SetDateAndTime(
         [in] long lSessionId, 
         [out] tagFCISTATUS* pStatus); 
     HRESULT _stdcall SetTempStandard(
         [in] long lSessionId, 
         [in] int nTemperatureStd, 
         [out] tagFCISTATUS* pStatus); 
     HRESULT _stdcall GetTestResultsCount(
         [in] long lSessionId, 
         [out] int* pnCount, 
         [out] tagFCISTATUS* pStatus); 
     HRESULT _stdcall ClearMemory(
         [in] long lSessionId, 
         [out] tagFCISTATUS* pStatus); 
     HRESULT _stdcall ValidateTag(
         [in] tagFCICOMMDEF* pCommDef, 
         [in] tagFCIDEVIN* pInputDef, 
         [in] tagFCIDEVOUT* pOutputDef, 
         [in] tagFCIDEVRELATION* pRelationDef, 
         [in] tagFCITEST* pTestDef, 
         [out] tagFCISTATUS* pStatus); 
     HRESULT _stdcall GetSensorModuleId(
         [in] long lSessionId, 
         long nSensorIndex, 
         [out] LPWSTR* pszwCalManufacturer, 
         [out] LPWSTR* pszwCalModel, 
         [out] LPWSTR* pszwCalSerialNum, 
         [out] LPWSTR* pszwCalDate, 
         [out] tagFCISTATUS* pStatus); 
     HRESULT _stdcall ClearCalFatEntry(
         [in] long nIndex, 
         [out, retval] VARIANT_BOOL* pResult); 
     HRESULT _stdcall SetAppDriverMode([in] long nMode); 
    }; 

    typedef enum { 
     FCI_OK = 0, 
     FCI_FAILED = 1, 
     FCI_COMM_ERROR = 2, 
     FCI_REVISION_ERROR = 3, 
     FCI_CANCELED = 4, 
     FCI_NOT_SUPPORTED = 5, 
     FCI_ALREADY_OPEN = 6, 
     FCI_WRONG_SESSION = 7, 
     FCI_WRONG_CALIBRATOR = 8, 
     FCI_ERR_IN_RANGE = 9, 
     FCI_ERR_IN_UNITS = 10, 
     FCI_ERR_IN_TYPE = 11, 
     FCI_ERR_IN_MANUAL = 12, 
     FCI_ERR_OUT_RANGE = 13, 
     FCI_ERR_OUT_UNITS = 14, 
     FCI_ERR_OUT_TYPE = 15, 
     FCI_ERR_OUT_MANUAL = 16, 
     FCI_ERR_INOUT = 17, 
     FCI_ERR_RELATION = 18, 
     FCI_ERR_PROBE = 19, 
     FCI_ERR_CJC = 20, 
     FCI_ERR_ENUM = 21, 
     FCI_ERR_RESOURCE = 22, 
     FCI_ERR_TESTPOINT = 23, 
     FCI_ERR_TESTTYPE = 24, 
     FCI_ERR_POWER = 25, 
     FCI_ERR_TAG = 26, 
     FCI_MEM_FULL = 27, 
     FCI_MEM_EMPTY = 28, 
     FCI_MEM_HAS_DATA = 29, 
     FCI_END_OF_UPLOAD = 30, 
     FCI_ERR_DOWNLOAD = 31, 
     FCI_ERR_TAGLENGTH = 32, 
     FCI_ERR_SNLENGTH = 33, 
     FCI_ERR_MAXPOINTS = 34, 
     FCI_END = 35 
    } tagFCISTATUS; 

    typedef struct tag_SYSTEMTIME { 

unsigned short wYear; 

unsigned short wMonth; 

unsigned short wDayOfWeek; 

unsigned short wDay; 

unsigned short wHour; 

unsigned short wMinute; 

unsigned short wSecond; 

unsigned short wMilliseconds; 
    } _SYSTEMTIME; 

    typedef struct tagtagFCICOMMDEF { 

tagFCICOMMTYPE CommType; 

__MIDL___MIDL_itf_mftFCINTF_0209_0001 __MIDL_0016; 
    } tagFCICOMMDEF; 

    typedef enum { 
     FCI_COMMTYPE_NONE = 1, 
     FCI_COMMTYPE_HART = 2 
    } tagFCICOMMTYPE; 

    typedef union tag__MIDL___MIDL_itf_mftFCINTF_0209_0001 { 

tagFCI_COMMDEF_HART HartData; 
    } __MIDL___MIDL_itf_mftFCINTF_0209_0001; 

    typedef struct tagtagFCI_COMMDEF_HART { 

unsigned char cBlockId; 

unsigned char cURev; 

unsigned char cPollAddr; 

unsigned char acUid[5]; 

unsigned char acTag[6]; 

unsigned char acDescriptor[12]; 

unsigned char acDate[3]; 

unsigned char acMessage[24]; 
    } tagFCI_COMMDEF_HART; 

    typedef struct tagtagFCIDEVIN { 

tagFCIBLOCKTYPE DevType; 

__MIDL___MIDL_itf_mftFCINTF_0209_0002 __MIDL_0017; 
    } tagFCIDEVIN; 

    typedef enum { 
     FCI_BLKTYPE_GENERIC = 1, 
     FCI_BLKTYPE_TEMP_RTD = 2, 
     FCI_BLKTYPE_TEMP_TC = 3, 
     FCI_BLKTYPE_FREQUENCY = 4, 
     FCI_BLKTYPE_PRESSURE = 5, 
     FCI_BLKTYPE_TEMP_MEASRTD = 6, 
     FCI_BLKTYPE_TEMP_MEASTC = 7, 
     FCI_BLKTYPE_HART = 8, 
     FCI_BLKTYPE_SWITCH = 9, 
     FCI_BLKTYPE_DIFFTEMP = 10 
    } tagFCIBLOCKTYPE; 

    typedef union tag__MIDL___MIDL_itf_mftFCINTF_0209_0002 { 

tagFCI_BLKDEF_PRESSURE PressureData; 

tagFCI_BLKDEF_RTD TempRtdData; 

tagFCI_BLKDEF_TC TempTcData; 

tagFCI_BLKDEF_RTD TempMeasRtdData; 

tagFCI_BLKDEF_TC TempMeasTcData; 

tagFCI_BLKDEF_FREQUENCY FrequencyData; 

tagFCI_BLKDEF_HART HartData; 

tagFCI_BLKDEF_DIFFTEMP DiffTempData; 

tagFCI_BLKDEF_GENERIC GenericData; 
    } __MIDL___MIDL_itf_mftFCINTF_0209_0002; 

    typedef struct tagtagFCI_BLKDEF_PRESSURE { 

single rURV; 

single rLRV; 

single rSettling; 

unsigned short wUnits; 

unsigned short wPressureType; 
    } tagFCI_BLKDEF_PRESSURE; 

    typedef struct tagtagFCI_BLKDEF_RTD { 

single rURV; 

single rLRV; 

single rSettling; 

unsigned short wUnits; 

unsigned short wProbeType; 

unsigned short wNumWires; 

unsigned short wRESERVED; 
    } tagFCI_BLKDEF_RTD; 

    typedef struct tagtagFCI_BLKDEF_TC { 

single rURV; 

single rLRV; 

single rSettling; 

single rManualCJC; 

unsigned short wUnits; 

unsigned short wProbeType; 

unsigned short wCJC; 

unsigned short wProbeConnect; 
    } tagFCI_BLKDEF_TC; 

    typedef struct tagtagFCI_BLKDEF_FREQUENCY { 

single rURV; 

single rLRV; 

single rSettling; 

single rAmplitude; 

unsigned short wUnits; 

unsigned short wWaveForm; 
    } tagFCI_BLKDEF_FREQUENCY; 

    typedef struct tagtagFCI_BLKDEF_HART { 

single rUSL; 

single rLSL; 

single rSettling; 

unsigned short wUnits; 
    } tagFCI_BLKDEF_HART; 

    typedef struct tagtagFCI_BLKDEF_DIFFTEMP { 

single rURV; 

single rLRV; 

single rSettling; 

unsigned short wUnits; 

unsigned short wDeviceVariable1; 

unsigned short wDeviceVariable2; 
    } tagFCI_BLKDEF_DIFFTEMP; 

    typedef struct tagtagFCI_BLKDEF_GENERIC { 

single rURV; 

single rLRV; 

single rSettling; 

unsigned short wUnits; 
    } tagFCI_BLKDEF_GENERIC; 

    typedef struct tagtagFCIDEVOUT { 

tagFCIBLOCKTYPE DevType; 

__MIDL___MIDL_itf_mftFCINTF_0209_0003 __MIDL_0018; 
    } tagFCIDEVOUT; 

    typedef union tag__MIDL___MIDL_itf_mftFCINTF_0209_0003 { 

tagFCI_BLKDEF_PRESSURE PressureData; 

tagFCI_BLKDEF_RTD TempMeasRtdData; 

tagFCI_BLKDEF_TC TempMeasTcData; 

tagFCI_BLKDEF_FREQUENCY FrequencyData; 

tagFCI_BLKDEF_HART HartData; 

tagFCI_BLKDEF_SWITCH Switch; 

tagFCI_BLKDEF_GENERIC GenericData; 
    } __MIDL___MIDL_itf_mftFCINTF_0209_0003; 

    typedef struct tagtagFCI_BLKDEF_SWITCH { 

unsigned short wContactType; 

unsigned short wForm; 

unsigned short wTripDirection; 

single rWetContactVoltage; 
    } tagFCI_BLKDEF_SWITCH; 

    typedef struct tagtagFCIDEVRELATION { 

tagFCIRELATIONTYPE RelType; 

__MIDL___MIDL_itf_mftFCINTF_0209_0004 __MIDL_0020; 
    } tagFCIDEVRELATION; 

    typedef enum { 
     FCI_RELTYPE_LINEAR = 0, 
     FCI_RELTYPE_SQRT = 1, 
     FCI_SQRT_3RD_PWR = 2, 
     FCI_SQRT_5TH_PWR = 3, 
     FCI_RELTYPE_TABLE = 4, 
     FCI_RELTYPE_SWITCH = 230 
    } tagFCIRELATIONTYPE; 

    typedef union tag__MIDL___MIDL_itf_mftFCINTF_0209_0004 { 

tagFCI_RELDEF_SQRT SqrtData; 

tagFCI_RELDEF_TABLE TableData; 
    } __MIDL___MIDL_itf_mftFCINTF_0209_0004; 

    typedef struct tagtagFCI_RELDEF_SQRT { 

single rBreakPoint; 
    } tagFCI_RELDEF_SQRT; 

    typedef struct tagtagFCI_RELDEF_TABLE { 

unsigned short wNumPoints; 

unsigned short wInterpolate; 

single rInput[30]; 

single rOutput[30]; 
    } tagFCI_RELDEF_TABLE; 

    typedef struct tagtagFCITEST { 

tagFCITESTTTYPE TestType; 

__MIDL___MIDL_itf_mftFCINTF_0209_0005 __MIDL_0022; 
    } tagFCITEST; 

    typedef enum { 
     FCI_TYPE_PROPORTIONAL = 1, 
     FCI_TYPE_SWITCH = 2 
    } tagFCITESTTTYPE; 

    typedef union tag__MIDL___MIDL_itf_mftFCINTF_0209_0005 { 

tagFCI_TEST_PROPORTIONAL Test; 

tagFCI_TEST_SWITCH SwitchTest; 
    } __MIDL___MIDL_itf_mftFCINTF_0209_0005; 

    typedef struct tagtagFCI_TEST_PROPORTIONAL { 

unsigned short wRESERVED; 

unsigned short wPowerSource; 

unsigned short wCalSourceInput; 

unsigned short wCalReadInput; 

unsigned short wCalMeasureOutput; 

unsigned short wNumTestPoints; 

single arTestPoint[21]; 

single rTestPointTolerance; 

single rAdjustmentLimit; 

single rMaxErrorLimit; 
    } tagFCI_TEST_PROPORTIONAL; 

    typedef struct tagtagFCI_TEST_SWITCH { 

single rTripSetPoint; 

single rTripTolerance; 

single rResetDeadband; 

single rDeadbandTolerance; 

single rRampTime; 

long bTestReset; 
    } tagFCI_TEST_SWITCH; 

    [ 
     odl, 
     uuid(FF5EFD42-7B15-11D1-B326-00001CBE02AA), 
     version(1.0), 
     helpstring("ICalibratorDownload Interface") 
    ] 
    interface ICalibratorDownload : IUnknown { 
     HRESULT _stdcall StartDownloading(
         [in] long lSessionId, 
         [in] LPWSTR szSessionName, 
         [out] tagFCISTATUS* pStatus); 
     HRESULT _stdcall DownloadTag(
         [in] long lSessionId, 
         [in] LPWSTR szwDeviceTag, 
         [in] LPWSTR szwDeviceSerialNum, 
         [in] tagFCICOMMDEF* pCommDef, 
         [in] tagFCIDEVIN* pInputDef, 
         [in] tagFCIDEVOUT* pOutputDef, 
         [in] tagFCIDEVRELATION* pRelationDef, 
         [in] tagFCITEST* pTestDef, 
         [in] LPWSTR szwSetupInstructions, 
         [in] LPWSTR szwCleanupInstructions, 
         [out] LPWSTR* pszwLocationInCalibrator, 
         [out] tagFCISTATUS* pStatus); 
     HRESULT _stdcall FinishDownloading(
         [in] long lSessionId, 
         [out] tagFCISTATUS* pStatus); 
     HRESULT _stdcall AbortDownload(
         [in] long lSessionId, 
         [out] tagFCISTATUS* pStatus); 
    }; 

    [ 
     odl, 
     uuid(FF5EFD43-7B15-11D1-B326-00001CBE02AA), 
     version(1.0), 
     helpstring("ICalibratorUpload Interface") 
    ] 
    interface ICalibratorUpload : IUnknown { 
     HRESULT _stdcall StartUploading(
         [in] long lSessionId, 
         [out] tagFCISTATUS* pStatus); 
     HRESULT _stdcall UploadNextTag(
         [in] long lSessionId, 
         [out] LPWSTR* pszwLocationInCalibrator, 
         [out] LPWSTR* pszwDeviceTag, 
         [out] LPWSTR* pszwDeviceSerialNum, 
         [out] LPWSTR* pszwTechnician, 
         [out] LPWSTR* pszwServiceNote, 
         [out] int* pnTemperatureStd, 
         [out] tagFCICOMMDEF* pCommDef, 
         [out] tagFCIRESULT* pAsFound, 
         [out] tagFCIRESULT* pAsLeft, 
         [out] tagFCISTATUS* pStatus); 
     HRESULT _stdcall FinishUploading(
         [in] long lSessionId, 
         [out] tagFCISTATUS* pStatus); 
     HRESULT _stdcall AbortUpload(
         [in] long lSessionId, 
         [out] tagFCISTATUS* pStatus); 
     HRESULT _stdcall PreviewNextTag(
         [in] long lSessionId, 
         [out] LPWSTR* pszwLocationInCalibrator, 
         [out] LPWSTR* pszwDeviceTag, 
         [out] LPWSTR* pszwDeviceSerialNum, 
         [out] long* plRecordType, 
         [out] _SYSTEMTIME* pDate, 
         [out] tagFCISTATUS* pStatus); 
    }; 

    typedef struct tagtagFCIRESULT { 

tagFCITESTTTYPE ResultType; 

__MIDL___MIDL_itf_mftFCINTF_0209_0006 __MIDL_0024; 
    } tagFCIRESULT; 

    typedef union tag__MIDL___MIDL_itf_mftFCINTF_0209_0006 { 

tagFCI_RESULT_PROPORTIONAL Results; 

tagFCI_RESULT_SWITCH SwitchResults; 
    } __MIDL___MIDL_itf_mftFCINTF_0209_0006; 

    typedef struct tagtagFCI_RESULT_PROPORTIONAL { 

double dInputLowerRangeValue; 

double dInputUpperRangeValue; 

int nInputRangeUnits; 

double dOutputLowerRangeValue; 

double dOutputUpperRangeValue; 

int nOutputRangeUnits; 

int nRelationship; 

int nNumberOfTestPoints; 

double adInput[21]; 

double adOutput[21]; 

LPWSTR szwAuxEquipManufacturer; 

LPWSTR szwAuxEquipModel; 

LPWSTR szwAuxEquipSerialNum; 

double dAmbientTemperature; 

int nAmbientTemperatureUnits; 

_SYSTEMTIME TestDate; 
    } tagFCI_RESULT_PROPORTIONAL; 

    typedef struct tagtagFCI_RESULT_SWITCH { 

unsigned short wUnits; 

single rTripPoint; 

single rResetPoint; 

unsigned short bResetTested; 

_SYSTEMTIME TestDate; 

LPWSTR szwAuxEquipManufacturer; 

LPWSTR szwAuxEquipModel; 

LPWSTR szwAuxEquipSerialNum; 
    } tagFCI_RESULT_SWITCH; 

    [ 
     odl, 
     uuid(084ABD42-30CE-49AD-B1FA-9C869AAD2A27), 
     version(1.0), 
     helpstring("IConfigurator Interface") 
    ] 
    interface IConfigurator : IUnknown { 
     [helpstring("method UploadConfiguration")] 
     HRESULT _stdcall UploadConfiguration(
         long* pDataAvailabe, 
         BSTR bstrFilePath, 
         [in, out] BSTR* pbstrTag, 
         [in, out] long* plDof, 
         [in, out] long* plAsFoundAsLeft, 
         [in, out] long* pnLocation, 
         [in, out] long* pnMultivar, 
         [in, out] BSTR* pbstrDeviceSerialNum, 
         [out, retval] VARIANT_BOOL* pResult); 
     [helpstring("method DownloadConfiguration")] 
     HRESULT _stdcall DownloadConfiguration(
         [in] BSTR bstrFilePath, 
         [in, out] long* pnLocation, 
         [out, retval] VARIANT_BOOL* pResult); 
     [helpstring("method ClearConfiguratorMemory")] 
     HRESULT _stdcall ClearConfiguratorMemory(); 
     [helpstring("method GetConfigCount")] 
     HRESULT _stdcall GetConfigCount([out, retval] long* lCount); 
     [helpstring("method PreviewConfiguration")] 
     HRESULT _stdcall PreviewConfiguration(
         long* pDataAvailabe, 
         [in, out] BSTR* pbstrTag, 
         [in, out] long* plDof, 
         [in, out] long* plAsFoundAsLeft, 
         [in, out] long* plOrigin, 
         [in, out] long* pnLocation, 
         [in, out] BSTR* pbstrDeviceSerialNum, 
         [out] _SYSTEMTIME* pDate, 
         [out, retval] VARIANT_BOOL* pResult); 
     [helpstring("method SetPortNumber")] 
     HRESULT _stdcall SetPortNumber(long nPort); 
     [helpstring("method ClearConfigFatEntry")] 
     HRESULT _stdcall ClearConfigFatEntry(
         long nIndex, 
         [out, retval] VARIANT_BOOL* pResult); 
    }; 
};

来源

2012-09-28 George

如果使用OLE-COM对象查看器（它会在已安装的Visual Studio'OleView.Exe' Windows SDK的文件夹），转到类型库，找到iterface，右键点击并进入到'查看...'（如果这是您第一次以管理员身份运行该程序，因为它需要在第一次轮胎执行“查看”时注册DLL）。将生成的.IDL文件粘贴为编辑对你的问题。请注意，该程序有32位和64位版本。 Visual Studio仅将64位版本放在x64系统的开始菜单中，但您可以转到该文件夹并运行32版本。 –

你无疑得到了导入COM服务器的类型库这些声明。通过添加对COM DLL的引用或手动运行Tlbimp.exe。

是的，这是一个问题，类型库只支持可以在IDL中表达的子集。而这些受到歧视的工会肯定不是其中的一部分。它们对于让结构在公寓边界正确编组唯一重要，只有代理/存根DLL需要正确地看到它们，这是自动生成的代码。

两种基本方法来解决这个问题，也不是特别愉快：

您可以编辑从类型库中产生的互操作库和修复结构的声明。首先用ildasm.exe反编译DLL，编辑IL并将其与ilasm.exe重新组合。您可以使用反编译的示例C＃程序来查看IL应该是什么样子。这是可行的，但重要的是COM组件是稳定的，所以你不必一遍又一遍地做这件事。在MSDN中有一个How-To article，它描述了这个过程。
写在C++/CLI语言组件的包装。您可以#include midl.exe从IDL生成的.h文件。很明显，只有在访问IDL或具有.h文件的情况下才能使用，如果您没有它，则需要联系供应商或作者。这样做的一个好处是你也可以绕过其他类型的问题。缺点是您需要了解C++的语言和COM客户端编程的基础知识。

来源

2012-09-28 20:37:34

我试图在两个dll上运行ildasm，但我得到了同样的错误，他们两个“错误：'xxx.dll'没有有效的CLR头并且不能被反汇编”在这一点上，是我的只有选项才能向制造商索取必要的文件？谢谢！ – George

不要在COM DLL上运行它，在它生成的互操作库上运行它。 –

工作，谢谢！我会看看我是否可以找出如何修改这个il文件来使它工作...... – George

如何通过Visual Studio COM包装器（或其他方式）在C＃中使用C++ property union

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