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C# 使用SetupDiGetDevicePropertyW获取USB信息_C#_Winforms_Winapi - Fatal编程技术网

C# 使用SetupDiGetDevicePropertyW获取USB信息

C# 使用SetupDiGetDevicePropertyW获取USB信息,c#,winforms,winapi,C#,Winforms,Winapi,我正在尝试让SetupDiGetDevicePropertyW方法工作,但没有成功 p/Invoke声明为: // Device Property [StructLayout(LayoutKind.Sequential)] internal struct DEVPROPKEY { public Guid fmtid; public UInt32 pid; } /// <summary> /// Provides details about a single USB d

我正在尝试让SetupDiGetDevicePropertyW方法工作,但没有成功

p/Invoke声明为:

// Device Property
[StructLayout(LayoutKind.Sequential)]
internal struct DEVPROPKEY
{
    public Guid fmtid;
    public UInt32 pid;
}
/// <summary>
/// Provides details about a single USB device.
/// </summary>
[StructLayout(LayoutKind.Sequential, Pack = 1)]
internal struct DeviceInterfaceData
{
    public int Size;
    public Guid InterfaceClassGuid;
    public int Flags;
    public UIntPtr Reserved;
}

[DllImport("setupapi.dll", SetLastError = true)]
internal static extern bool SetupDiGetDevicePropertyW(
        IntPtr deviceInfoSet,
        ref DeviceInterfaceData DeviceInfoData,
        ref DEVPROPKEY propertyKey,
        out UInt64 propertyType, // or Uint32 ?
        IntPtr propertyBuffer, // or byte[]
        uint propertyBufferSize,
        out uint requiredSize,
        UInt32 flags);

/// <summary>
/// Gets a new key for the bus reported device description.
/// </summary>
internal static DEVPROPKEY DEVPKEY_Device_BusReportedDeviceDesc
{
    get
    {
        DEVPROPKEY key = new DEVPROPKEY();
        key.pid = 4;
        key.fmtid = new Guid((uint)0x540b947e, (ushort)0x8b40, (ushort)0x45bc, 0xa8, 0xa2, 0x6a, 0x0b, 0x89, 0x4c, 0xbd, 0xa2);
        return key;
    }
}
infoSet的值来自:

IntPtr infoSet = UnsafeNativeMethods.SetupDiGetClassDevs(ref hidGuid, null, IntPtr.Zero, DIGCF_DEVICEINTERFACE | DIGCF_PRESENT);
deviceInterfaceData的值包括接口的GUID,这些值来自:

UnsafeNativeMethods.SetupDiEnumDeviceInterfaces(infoSet, 0, ref hidGuid, (uint)i, ref deviceInterfaceData);
hidGuid来自(其中结果是Guid对象:

UnsafeNativeMethods.HidD_GetHidGuid(out result);

我在这里做错了什么?

我刚刚意识到我在使用DeviceInterfaceData,而我应该使用从SetupDiEnumDeviceInfo调用派生的DeviceInfo数据。如果您不需要进一步的帮助,请删除您的问题。
UnsafeNativeMethods.HidD_GetHidGuid(out result);