Question

我发现了一些关于类似问题的帖子，但仍然无法解决我的问题。我有一个dll，我试图使用PInvoke包装.Net并且我要么得到不平衡的堆栈或受保护的内存错误。我正在尝试执行的函数具有以下签名：

niUSRP_API_Function niUSRP_FindDevices(int32_t devicesArraySize, niUSRP_Device* devices, int32_t* numberOfDevicesInSystem);

typedef int32_t niUSRP_Status;

typedef struct niUSRP_Device_struct
{
   char address[16];
   char serialNumber[16];
   char model[36];
} niUSRP_Device;

#define niUSRP_API_Function __declspec(dllexport) niUSRP_Status __stdcall

这些是我尝试的相应C＃签名：

[DllImport("niusrp.dll", CallingConvention = CallingConvention.Cdecl, EntryPoint = "niUSRP_FindDevices")]
public static extern int FindDevices(int devicesArraySize, Device[] devices, ref int devicesFound);

[DllImport("niusrp.dll", CallingConvention = CallingConvention.Cdecl, EntryPoint = "niUSRP_FindDevices")]
public static extern int FindDevices(int devicesArraySize, ref Device[] devices, ref int devicesFound);

[DllImport("niusrp.dll", CallingConvention = CallingConvention.Cdecl, EntryPoint = "niUSRP_FindDevices")]
public static extern int FindDevices(int devicesArraySize, ref Device devices, ref int devicesFound);

[DllImport("niusrp.dll", CallingConvention = CallingConvention.Cdecl, EntryPoint = "niUSRP_FindDevices")]
public static extern int FindDevices(int devicesArraySize, IntPtr devices, ref int devicesFound);

[DllImport("niusrp.dll", CallingConvention = CallingConvention.Cdecl, EntryPoint = "niUSRP_FindDevices")]
public static extern void FindDevices(int devicesArraySize, IntPtr devices, ref int devicesFound);

[StructLayout(LayoutKind.Sequential, Size = 68, CharSet = CharSet.Ansi)]
public struct Device
{
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
    public string Address;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
    public string SerialNumber;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 36)]
    public string Model;
}

我尝试过的其他几件事

使用`[In] / [Out]`属性
从任何CPU更改为x86

感谢任何帮助。

PInvoke不平衡堆栈

0 个答案: