将文件从 TrueCrypt 卷复制到剪贴板？

Question

我使用此代码将文件复制到剪贴板：

IDataObject data = new DataObject();
data.SetData(DataFormats.FileDrop, new string[] {@"X:\test.doc"});
MemoryStream memo = new MemoryStream(4);
byte[] bytes = new byte[] { (byte)(5), 0, 0, 0 };
memo.Write(bytes, 0, bytes.Length);
data.SetData("Preferred DropEffect", memo);
Clipboard.SetDataObject(data);

不幸的是，如果磁盘是 TrueCrypt 安装卷，则此方法不起作用。在 TrueCrypt 卷上执行此操作的方法是什么？

Answer 1

不幸的是，我认为如果没有正确的 Shell ID 列表，您就无法摆脱困境，在我的 Windows 7 上，您的代码甚至无法与常规文件系统一起工作。正确的代码首先会提供 CIDL：

    var data = new DataObject();
    var files = new StringCollection() { @"T:\Test.doc" };
    data.SetFileDropList(files);
    data.SetData("Preferred DropEffect", true, new MemoryStream(new byte[] { 5, 0, 0, 0 }));
    data.SetData("Shell IDList Array", true, CreateShellIDList(files));
    Clipboard.SetDataObject(data, true);

其中 CreateShellIDList 创建所需 CIDA (CFSTR_SHELLIDLIST) 结构的二进制表示形式。实现如下：

[DllImport("shell32.dll", CharSet = CharSet.Auto)]
public static extern IntPtr ILCreateFromPath(string path);
[DllImport("shell32.dll", CharSet = CharSet.None)]
public static extern void ILFree(IntPtr pidl);
[DllImport("shell32.dll", CharSet = CharSet.None)]
public static extern int ILGetSize(IntPtr pidl);

private static MemoryStream CreateShellIDList(StringCollection filenames)
{
    // first convert all files into pidls list
    int pos = 0;
    byte[][] pidls = new byte[filenames.Count][];
    foreach (var filename in filenames)
    {
        // Get pidl based on name
        IntPtr pidl = ILCreateFromPath(filename);
        int pidlSize = ILGetSize(pidl);
        // Copy over to our managed array
        pidls[pos] = new byte[pidlSize];
        Marshal.Copy(pidl, pidls[pos++], 0, pidlSize);
        ILFree(pidl);
    }

    // Determine where in CIDA we will start pumping PIDLs
    int pidlOffset = 4 * (filenames.Count + 2);
    // Start the CIDA stream stream
    var memStream = new MemoryStream();
    var sw = new BinaryWriter(memStream);
    // Initialize CIDA witha count of files
    sw.Write(filenames.Count);
    // Calcualte and write relative offsets of every pidl starting with root
    sw.Write(pidlOffset);
    pidlOffset += 4; // root is 4 bytes
    foreach(var pidl in pidls)
    {
        sw.Write(pidlOffset);
        pidlOffset += pidl.Length;
    }

    // Write the root pidl (0) followed by all pidls
    sw.Write(0);
    foreach(var pidl in pidls) sw.Write(pidl);
    // stream now contains the CIDA
    return memStream;
}

我不能把所有的功劳都归功于这里，我前段时间发现了这个 CIDA 代码，并将其移植到 c# 中。不太记得原始来源了，但到目前为止效果很好（我也刚刚在 TrueCrypt 上测试过）