public static MemoryStream GenerateFileDescriptor(List <FileAttributes> files)
{
try
{
MemoryStream FileDescriptorMemoryStream = new MemoryStream();
// Write out the FILEGROUPDESCRIPTOR.cItems value
FileDescriptorMemoryStream.Write(BitConverter.GetBytes(files.Count), 0, sizeof(UInt32));
FILEDESCRIPTOR FileDescriptor = new FILEDESCRIPTOR();
foreach (var si in files)
{
string n = si.RelativePath;
//If the file is in the root folder of the operation, the relative path will not be set!
if (string.IsNullOrEmpty(si.RelativePath))
{
n = si.FileName;
}
FileDescriptor.cFileName = n;
Int64 FileWriteTimeUtc = si.LastChangeTime.ToFileTimeUtc();
FileDescriptor.ftLastWriteTime.dwHighDateTime = (Int32)(FileWriteTimeUtc >> 32);
FileDescriptor.ftLastWriteTime.dwLowDateTime = (Int32)(FileWriteTimeUtc & 0xFFFFFFFF);
FileDescriptor.nFileSizeHigh = (UInt32)(si.FileSize >> 32);
FileDescriptor.nFileSizeLow = (UInt32)(si.FileSize & 0xFFFFFFFF);
FileDescriptor.dwFlags = FD_WRITESTIME | FD_FILESIZE | FD_PROGRESSUI;
Int32 FileDescriptorSize = Marshal.SizeOf(FileDescriptor);
IntPtr FileDescriptorPointer = Marshal.AllocHGlobal(FileDescriptorSize);
Marshal.StructureToPtr(FileDescriptor, FileDescriptorPointer, true);
Byte[] FileDescriptorByteArray = new Byte[FileDescriptorSize];
Marshal.Copy(FileDescriptorPointer, FileDescriptorByteArray, 0, FileDescriptorSize);
Marshal.FreeHGlobal(FileDescriptorPointer);
FileDescriptorMemoryStream.Write(FileDescriptorByteArray, 0, FileDescriptorByteArray.Length);
}
return(FileDescriptorMemoryStream);
}
catch (Exception ex)
{
ISLogger.Write("Get file descriptor failed: " + ex.Message);
return(null);
}
}
private void GetDataFileDescriptor(ref FORMATETC format, ref STGMEDIUM medium)
{
try
{
if (format.tymed != TYMED.TYMED_HGLOBAL)
{
ISLogger.Write("Shell requested file descriptor via tymed {0}. Not supported", format.tymed);
return;
}
if (fileDescriptorStream == null)
{
fileDescriptorStream = FILEDESCRIPTOR.GenerateFileDescriptor(storedFiles.AllFiles);
}
byte[] desc = fileDescriptorStream.ToArray();
medium.tymed = TYMED.TYMED_HGLOBAL;
medium.unionmember = CopyToHGlobal(desc);
}catch (Exception ex)
{
ISLogger.Write("Failed to transfer file descriptor to shell: " + ex.Message);
}
}