public static extern bool CopyFileEx(
string lpExistingFileName,
string lpNewFileName,
APICopyProgressRoutine lpProgressRoutine,
IntPtr lpData,
ref Int32 lpCancel,
CopyFileOptions dwCopyFlags);
static private CopyFileResult CopyFileInternal(
string sourceFilename,
string destinationFilename,
CopyProgressDelegate progressHandler,
IntPtr userData,
CopyFileOptions copyOptions,
CancellationToken cancelToken)
{
// On error, throw IOException with the value from Marshal.GetLastWin32Error
CopyProgressDelegate handler = progressHandler;
int cancelFlag = 0;
APICopyProgressRoutine callback;
if (handler == null)
{
callback = null;
}
else
{
callback = new APICopyProgressRoutine((tfSize, xferBytes, strmSize, strmXferBytes,
strmNum, cbReason, srcHandle, dstHandle, udata) => {
var args = new CopyProgressArgs(tfSize, xferBytes, strmSize, strmXferBytes,
strmNum, cbReason, srcHandle, dstHandle, udata);
handler(args);
return((Int32)args.Result);
});
}
if (cancelToken.CanBeCanceled)
{
cancelToken.Register(() => { cancelFlag = 1; });
}
bool rslt = CopyFileEx(
sourceFilename,
destinationFilename,
callback,
userData,
ref cancelFlag,
copyOptions);
int err = 0;
if (!rslt)
{
err = Marshal.GetLastWin32Error();
}
return(new CopyFileResult(rslt, err));
}
