private void Cancel()
{
// Storing to locals to avoid data ----s
SafeHandle handle = this._handle;
NativeOverlapped *overlapped = this._overlapped;
if (handle != null && !handle.IsInvalid && overlapped != null)
{
if (!UnsafeNativeMethods.CancelIoEx(handle, overlapped))
{
// This case should not have any consequences although
// it will be easier to debug if there exists any special case
// we are not aware of.
int errorCode = Marshal.GetLastWin32Error();
Debug.WriteLine("CancelIoEx finished with error code {0}.", errorCode);
}
SetOperationCompleted();
}
}
internal static void WinIOError(int errorCode, String maybeFullPath)
{
// This doesn't have to be perfect, but is a perf optimization.
bool isInvalidPath = errorCode == UnsafeNativeMethods.ERROR_INVALID_NAME || errorCode == UnsafeNativeMethods.ERROR_BAD_PATHNAME;
String str = GetDisplayablePath(maybeFullPath, isInvalidPath);
switch (errorCode)
{
case UnsafeNativeMethods.ERROR_FILE_NOT_FOUND:
if (str.Length == 0)
{
throw new FileNotFoundException(SR.GetString(SR.IO_FileNotFound));
}
else
{
throw new FileNotFoundException(String.Format(CultureInfo.CurrentCulture, SR.GetString(SR.IO_FileNotFound_FileName), str), str);
}
case UnsafeNativeMethods.ERROR_PATH_NOT_FOUND:
if (str.Length == 0)
{
throw new DirectoryNotFoundException(SR.GetString(SR.IO_PathNotFound_NoPathName));
}
else
{
throw new DirectoryNotFoundException(String.Format(CultureInfo.CurrentCulture, SR.GetString(SR.IO_PathNotFound_Path), str));
}
case UnsafeNativeMethods.ERROR_ACCESS_DENIED:
if (str.Length == 0)
{
throw new UnauthorizedAccessException(SR.GetString(SR.UnauthorizedAccess_IODenied_NoPathName));
}
else
{
throw new UnauthorizedAccessException(String.Format(CultureInfo.CurrentCulture, SR.GetString(SR.UnauthorizedAccess_IODenied_Path), str));
}
case UnsafeNativeMethods.ERROR_ALREADY_EXISTS:
if (str.Length == 0)
{
goto default;
}
throw new IOException(SR.GetString(SR.IO_IO_AlreadyExists_Name, str), UnsafeNativeMethods.MakeHRFromErrorCode(errorCode));
case UnsafeNativeMethods.ERROR_FILENAME_EXCED_RANGE:
throw new PathTooLongException(SR.GetString(SR.IO_PathTooLong));
case UnsafeNativeMethods.ERROR_INVALID_DRIVE:
throw new DriveNotFoundException(String.Format(CultureInfo.CurrentCulture, SR.GetString(SR.IO_DriveNotFound_Drive), str));
case UnsafeNativeMethods.ERROR_INVALID_PARAMETER:
throw new IOException(UnsafeNativeMethods.GetMessage(errorCode), UnsafeNativeMethods.MakeHRFromErrorCode(errorCode));
case UnsafeNativeMethods.ERROR_SHARING_VIOLATION:
if (str.Length == 0)
{
throw new IOException(SR.GetString(SR.IO_IO_SharingViolation_NoFileName), UnsafeNativeMethods.MakeHRFromErrorCode(errorCode));
}
else
{
throw new IOException(SR.GetString(SR.IO_IO_SharingViolation_File, str), UnsafeNativeMethods.MakeHRFromErrorCode(errorCode));
}
case UnsafeNativeMethods.ERROR_FILE_EXISTS:
if (str.Length == 0)
{
goto default;
}
throw new IOException(String.Format(CultureInfo.CurrentCulture, SR.GetString(SR.IO_IO_FileExists_Name), str), UnsafeNativeMethods.MakeHRFromErrorCode(errorCode));
case UnsafeNativeMethods.ERROR_OPERATION_ABORTED:
throw new OperationCanceledException();
default:
throw new IOException(UnsafeNativeMethods.GetMessage(errorCode), UnsafeNativeMethods.MakeHRFromErrorCode(errorCode));
}
}