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挂载卷，则不起作用。在TrueCrypt卷上执行此操作的方法是什么？

Answer 1

不幸的是，如果没有正确的Shell ID列表，我认为你无法逃脱，在我的Windows 7上，你的代码甚至不能用于常规文件系统。正确的代码首先提供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创建所需的CIDA（CFSTR_SHELLIDLIST）结构的二进制表示。实施如下：

[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;
}

我不能在这里得到所有的功劳，我前段时间找到了这个CIDA代码并将其移植到c＃。真的不记得原始来源，但它到目前为止运行良好（我刚刚在TrueCrypt上测试过它）

将文件从TrueCrypt卷复制到剪贴板？

1 个答案: