Question

我发现了很多关于如何在互联网上封送wchar_t和wchar*的信息，但是现在我正在尝试整理WINBIO_STRING类型，这是定义的为wchar[256]。将其编组为char[]数组，但数组中的每个其他元素都是\0，我想避免这种情况。是否有更合适的方法来编组这些数据（它是结构的成员，特别是WINBIO_UNIT_SCHEMA结构）。这是我的代码：

[StructLayout(LayoutKind.Sequential)]
public struct BiometricUnitSchema
{
    public int UnitId;
    public BiometricPoolType PoolType;
    public BiometricType BiometricFactor;
    public BiometricSubtype SensorSubType;
    public BiometricCapabilities Capabilities;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 256)]
    public char[] DeviceInstanceId;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 256)]
    public char[] Description;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 256)]
    public char[] Manufacturer;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 256)]
    public char[] Model;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 256)]
    public char[] SerialNumber;
    public BiometricVersion FirmwareVersion;
}

我也遇到了FirmwareVersion字段总是包含MajorVersion和MinorVersion值0的问题，但我不确定这个结果是不正确还是只是误导。

Answer 1

我通过将WINBIO_STRING编组为C＃中的字符串而不是char []来解决此问题。我还必须在我的结构中添加Unicode字符集。

我的新结构：

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct BiometricUnitSchema
{
    public int UnitId;
    public BiometricPoolType PoolType;
    public BiometricType BiometricFactor;
    public BiometricSubtype SensorSubType;
    public BiometricCapabilities Capabilities;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)]
    public string DeviceInstanceId;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)]
    public string Description;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)]
    public string Manufacturer;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)]
    public string Model;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)]
    public string SerialNumber;
    public BiometricVersion FirmwareVersion;
}

如何编组wchar []

1 个答案: