Question

我不是COM或C ++ / C＃封送专家，可以在这种情况下使用一些帮助：

原生代码：

typedef struct _Foo {
    FooType a; // enum
    WCHAR b[16];
    WCHAR c[16];
    BOOL d;
    ULONG size;
} Foo;

typedef struct _Bar {
    GUID a;
    WCHAR b[16];
    WCHAR c[16];
    BOOL d;
} Bar;

typedef struct _Baz {
    FILETIME a;
    FILETIME b;
    ULONG c;
    ULONG d;
    GUID e;
} Baz;

typedef struct _FooBarBaz
{
    SomeType type; // enum

    [switch_is(type)] union
    {
        [case(SomeType.A)]
        Foo a;

        [case(SomeType.B)]
        Bar b;

        [case(SomeType.C)]
        Baz b;
    } data;
} FooBarBaz;

托管代码：

[StructLayout(LayoutKind.Sequential)]
internal struct Foo
{
    public FooType a;

    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
    public char[] b;

    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
    public char[] c;

    [MarshalAs(UnmanagedType.Bool)]
    public bool d;

    [MarshalAs(UnmanagedType.U4)]
    public uint e;
}

[StructLayout(LayoutKind.Sequential)]
internal struct Bar
{
    public Guid a;

    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
    public char[] b;

    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
    public char[] c;

    [MarshalAs(UnmanagedType.Bool)]
    public bool d;
}

[StructLayout(LayoutKind.Sequential)]
internal struct Baz
{
    public ComTypes.FILETIME a;

    public ComTypes.FILETIME b;

    [MarshalAs(UnmanagedType.U4)]
    public uint c;

    [MarshalAs(UnmanagedType.U4)]
    public uint d;

    public Guid e;
}

internal struct FooBarBaz
{
    public SomeType Type;

    // ??????
}

我不确定如何将本机结构FooBarBaz转换/编组为托管代码。这里有任何提示。

Answer 1

可以找到关于翻译的宝贵资源here IMO，读它值得每一页：）

关于FooBarZ，您正在寻找[FieldOffset（NBR）]，这是翻译联合的方式。

查看the translation in pinvoke的STRRET struct以获取有关如何使用它的示例。

元帅C ++到C＃结构与结构的联合

1 个答案: