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我需要从 C DLL 获取数据到 C# 应用程序。这是错误:

无法编组类型为“KnittingWago.Common.WAGO_DATA_TO_USER_T”的字段“计数器”:托管/非托管类型组合无效(数组字段必须与 ByValArray 或 SafeArray 配对)。

这是DLL .h

#define WAGO_NB_COUNTERS_C 80
#define WAGO_NB_ENCODERS_C 10 

struct WAGO_DATA_TO_USER_T
{
   unsigned int Counters[WAGO_NB_COUNTERS_C];
   int Encoders[WAGO_NB_ENCODERS_C];
   unsigned int Weight;
   bool CalibrationValid;
   bool LastCalibrationFailed;
};

这是 C# 结构声明:

const int WAGO_NB_COUNTERS_C = 80;
const int WAGO_NB_ENCODERS_C = 10;

struct WAGO_DATA_TO_USER_T
{
   [MarshalAs(UnmanagedType.U4, SizeConst = GlobalConstant.WAGO_NB_COUNTERS_C)]
   UInt32[] Counters;
   [MarshalAs(UnmanagedType.I4, SizeConst = GlobalConstant.WAGO_NB_ENCODERS_C)]
   Int32[] Encoders;
   UInt32 Weight;
   Boolean CalibrationValid;
   Boolean LastCalibrationFailed;
};

如何声明 C# 结构以获取正确的数据而不会出错?

谢谢


编辑 :

我已将 Struct 重写为:

internal struct WAGO_DATA_TO_USER_T
{
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = GlobalConstant.WAGO_NB_COUNTERS_C)]
    UInt32[] Counters;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = GlobalConstant.WAGO_NB_ENCODERS_C)]
    Int32[] Encoders;
    UInt32 Weight;
    Boolean CalibrationValid;
    Boolean LastCalibrationFailed;
};

不再有错误,但值与预期不符。

应该像:

Counter[0] = ~ 5000
Counter[1] = ~ 30000
Counter[2-79] = 0

真的是:

Counter[0] = 40
Counter[1] = 1080228
Counter[2] = 82964616
Counter[3-79] = All have a non-zero value
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1 回答 1

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编组是正确的,但我调用的设备未由外部非托管 dll 初始化。所以我正在读取导致无效数据的 uninitialisez 内存

于 2012-10-10T07:21:00.810 回答