Csharp 将 struct 数组从 C# 传递到 C++

最后，我找到了一个解决方案.它可能不是优雅的，但它是有效的.

我需要以下C#声明:

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
internal unsafe struct USER_INFO2
{
    public fixed char Name[80];
    public fixed char Password[40];
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
internal unsafe struct PRINCIPAL_INFO
{
    internal int PrincipalStatus;
    public fixed char UniqueID[39];
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
internal unsafe struct ALLUSERINFO
{
    internal USER_INFO2 UserInfo;
    internal PRINCIPAL_INFO PrincipalInfo;
    public fixed char Name[10];
    public fixed char Role[256];
}

[DllImport("mydll.dll", CharSet = CharSet.Unicode)]
internal static extern bool GetUsers(ALLUSERINFO* pInfo, uint size, out uint count);

然后，对GetUsers的呼叫如下所示:

unsafe
{
    ALLUSERINFO[] buffer = new ALLUSERINFO[maxUsers];
    fixed (ALLUSERINFO* pBuffer = &buffer[0])
    {
        uint actualUsers;
        bool res = DSQL.DSEnumAllUsers(pBuffer, maxUsers, out actualUsers);
        if (!res)
            return false;
        // do something with the returned data in the buffer
    }
}

我不确定这struct个声明中是否所有属性都是必需的.关键的事情似乎是使用unsafe和fixed这两个关键词.

感谢@CharlieFace帮助我将我的 idea bootstrap 到正确的方向！