비동기 및 작업에 대해 읽고 PInvoke를 통해 CopyFileEx 메서드를 진행중인 작업 패턴으로 변환하려고 시도했습니다. 진행 부분에 문제가 있습니다.CopyFileEx를 작업 패턴으로 변환
CopyFileEx에는 포인터를 취하는 lpData라는 매개 변수가있는 CopyProgressRoutine이라는 콜백이 있습니다. 진행 상황을보고 할 수 있도록 내 IProgress 인터페이스를 전달할 수 있다고 생각했습니다. 그러나 클래스가 아닌 구조체를 사용해야합니다. 어떻게하면이 작업을 얻을 수있는 아이디어, 아니면 완전히 잘못된 방향으로 향하고 있습니까?
public class ProgressReportAsync
{
public int PercentDone { get; set; }
public string InfoText { get; set; }
public void setProgress(long _progress, long _total)
{
PercentDone = Convert.ToInt32((_progress * 100)/_total);
InfoText = PercentDone + "% complete."; ;
}
}
class FileCopyAsync
{
class UserCallbackArg
{
public CancellationToken ct;
public IProgress<ProgressReportAsync> prg;
public UserCallbackArg(CancellationToken _ct, IProgress<ProgressReportAsync> _prg)
{
ct = _ct;
prg = _prg;
}
public UserCallbackArg() { }
}
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool CopyFileEx(string lpExistingFileName, string lpNewFileName, CopyProgressRoutine lpProgressRoutine, Object lpData, ref bool pbCancel, CopyFileFlags dwCopyFlags);
private delegate CopyProgressResult CopyProgressRoutine(long TotalFileSize, long TotalBytesTransferred,
long StreamSize, long StreamBytesTransferred, uint dwStreamNumber, CopyProgressCallbackReason dwCallbackReason,
IntPtr hSourceFile, IntPtr hDestinationFile, IntPtr lpData);
[Flags]
enum CopyFileFlags : uint
{
COPY_FILE_FAIL_IF_EXISTS = 0x00000001,
COPY_FILE_RESTARTABLE = 0x00000002,
COPY_FILE_OPEN_SOURCE_FOR_WRITE = 0x00000004,
COPY_FILE_ALLOW_DECRYPTED_DESTINATION = 0x00000008,
COPY_FILE_COPY_SYMLINK = 0x00000800,
COPY_FILE_NO_BUFFERING = 0x00001000
}
enum CopyProgressResult : uint
{
PROGRESS_CONTINUE = 0,
PROGRESS_CANCEL = 1,
PROGRESS_STOP = 2,
PROGRESS_QUIET = 3
}
enum CopyProgressCallbackReason : uint
{
CALLBACK_CHUNK_FINISHED = 0x00000000,
CALLBACK_STREAM_SWITCH = 0x00000001
}
private static bool m_bCancel;
private CopyProgressResult CopyProgressHandler(long total, long transferred, long streamSize, long StreamByteTrans, uint dwStreamNumber, CopyProgressCallbackReason reason, IntPtr hSourceFile, IntPtr hDestinationFile, IntPtr lpData)
{
switch (reason)
{
case CopyProgressCallbackReason.CALLBACK_CHUNK_FINISHED:
UserCallbackArg ucarg = (UserCallbackArg)Marshal.PtrToStructure(lpData, typeof(UserCallbackArg));
IProgress<ProgressReportAsync> prg = ucarg.prg;
ProgressReportAsync prgReport = new ProgressReportAsync();
prgReport.setProgress(transferred, total);
prg.Report(prgReport);
if (ucarg.ct.IsCancellationRequested)
{
m_bCancel = true;
}
return m_bCancel ? CopyProgressResult.PROGRESS_CANCEL : CopyProgressResult.PROGRESS_CONTINUE;
default:
return CopyProgressResult.PROGRESS_CONTINUE;
}
}
public FileCopyAsync() { }
public Task DoWorkAsync(string _from, string _to, CancellationToken ct, IProgress<ProgressReportAsync> prg)
{
return TaskEx.Run(() =>
{
bool copyResult;
if (File.Exists(_to))
{
//throw new Exception("File already exists: " + _to);
}
if (!File.Exists(_from))
{
throw new FileNotFoundException(_from);
}
FileInfo fi = new FileInfo(_from);
m_bCancel = false;
UserCallbackArg ucarg = new UserCallbackArg(ct, prg);
GCHandle handle = GCHandle.Alloc(ucarg, GCHandleType.Pinned);
IntPtr ptr = handle.AddrOfPinnedObject();
if (fi.Length > (1024 * 1024 * 100))
{
//Greater than 100mb then no buffer flag added
copyResult = CopyFileEx(_from, _to, new CopyProgressRoutine(CopyProgressHandler), ptr, ref m_bCancel, (CopyFileFlags.COPY_FILE_RESTARTABLE & CopyFileFlags.COPY_FILE_FAIL_IF_EXISTS & CopyFileFlags.COPY_FILE_NO_BUFFERING));
}
else
{
copyResult = CopyFileEx(_from, _to, new CopyProgressRoutine(CopyProgressHandler), ptr, ref m_bCancel, (CopyFileFlags.COPY_FILE_RESTARTABLE & CopyFileFlags.COPY_FILE_FAIL_IF_EXISTS));
}
if (!copyResult)
{
int error = Marshal.GetLastWin32Error();
if (m_bCancel && (error == 1235))
{
return;
}
else
{
Win32Exception ex = new Win32Exception(error);
throw new Win32Exception(error);
}
}
});
}
}
DoWorkAsync를 동기로 설정해야합니다. 동기 동작을 중심으로 스레드를 래핑하는 것은 안티 패턴입니다. 발신자가 직접 할 수 있습니다. – usr