Question

我试图在C＃中使用Coredll.dll来检索已挂载商店的数据。

以下是我应该模仿本地库中结构的结构（STORAGEDEVICEINFO，STORAGEINFO）

[StructLayout(LayoutKind.Sequential)]
public unsafe struct STORAGEDEVICEINFO
{
    public DWORD cbSize;
    public fixed System.UInt16 szProfile[32];
    public DWORD dwDeviceClass;
    public DWORD dwDeviceType;
    public DWORD dwDeviceFlags;

}
[StructLayout(LayoutKind.Sequential)]
public unsafe struct STOREINFO
{
    public DWORD cbSize;
    public fixed System.UInt16 szDeviceName[8];
    public fixed System.UInt16 szStoreName[32];
    public DWORD dwDeviceClass;
    public DWORD dwDeviceType;
    public STORAGEDEVICEINFO sdi;
    public DWORD dwDeviceFlags;
    public SECTORNUM snNumSectors;
    public DWORD dwBytesPerSector;
    public SECTORNUM snFreeSectors;
    public SECTORNUM snBiggestPartCreatable;
    public DWORD ftCreated; /* ? */
    public DWORD ftLastModified;
    public DWORD dwAttributes;
    public DWORD dwPartitionCount;
    public DWORD dwMountCount;
}

这是我的FindStoreInfo调用（HANDLE只是IntPtr）：

    [DllImport("Coredll.dll", SetLastError = true)]
    public static extern HANDLE FindFirstStore(STOREINFO *info/*PSTOREINFO pStoreInfo*/);

函数调用时没有错误但是它没有改变info。除了cbSize之外，它将它留作空白结构（但是从sizeof调用更改）。这就是我所说的。

        STOREINFO info;
        info.cbSize = (uint)Marshal.SizeOf(typeof(STOREINFO));
        Store.StorageManager.FindFirstStore(&info);

调用GetLastError返回0x57，即＆＃34; ERROR_INVALID_PARAMETER＆＃34;。我不确定为什么要退货，因为我所寻找的只是指针。

Answer 1

看起来你的cbSize可能是错的。尝试改变 public fixed char szProfile[32];至public fixed System.UInt16 szProfile[32];

此外，FILETIME是两个DWORD结构，而不是一个DWORD。

Answer 2

我知道这是一个老问题，但也许可以帮助其他人：

以下结构对我有用，请注意编组：

[StructLayout(LayoutKind.Sequential)]
public unsafe struct STORAGEDEVICEINFO
{
    public DWORD cbSize;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
    public string szProfile;
    public DWORD dwDeviceClass;
    public DWORD dwDeviceType;
    public DWORD dwDeviceFlags;
}

[StructLayout(LayoutKind.Sequential)]
public unsafe struct STOREINFO
{
    public DWORD cbSize;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 8)]
    public string szDeviceName;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
    public string szStoreName;
    public DWORD dwDeviceClass;
    public DWORD dwDeviceType;
    public STORAGEDEVICEINFO sdi;
    public DWORD dwDeviceFlags;
    public SECTORNUM snNumSectors;
    public DWORD dwBytesPerSector;
    public SECTORNUM snFreeSectors;
    public SECTORNUM snBiggestPartCreatable;
    public FILETIME ftCreated;
    public FILETIME ftLastModified;
    public DWORD dwAttributes;
    public DWORD dwPartitionCount;
    public DWORD dwMountCount;
}

[StructLayout(LayoutKind.Sequential)]
public unsafe struct PARTINFO
{
    public DWORD cbSize;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
    public string szPartitionName;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
    public string szFileSys;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 64)]
    public string szVolumeName;
    public SECTORNUM snNumSectors;
    public FILETIME ftCreated;
    public FILETIME ftLastModified;
    public DWORD dwAttributes;
    public BYTE bPartType;
}

我还了解到，您可以通过引用P / Invoke调用来传递结构：

    [DllImport("Coredll.dll", SetLastError = true)]
    public static extern HANDLE FindFirstStore(ref STOREINFO storeInfo);

    [DllImport("Coredll.dll", SetLastError = true)]
    public static extern bool FindNextStore(HANDLE hSearch, ref STOREINFO storeInfo);

通话：

STOREINFO si = new STOREINFO();
HANDLE hSearch = INVALID_HANDLE_VALUE;

si.cbSize = (uint)Marshal.SizeOf(typeof(STOREINFO));

// enumerate first store
hSearch = StorageManager.FindFirstStore(ref si);

使用Coredll.dll检索商店信息

2 个答案: