Different way to copy a file

svanwass

In code, how can I copy a file from X:\ to X:\archive without reading entire file contents? I am using :

FileStream fs = new FileStream("X:\\file.dat", FileMode.Open, FileAccess.Read);

                                // Create a byte array of file stream length
                                byte\[\] writeArray = new byte\[fs.Length\];

                                //Read block of bytes from stream into the byte array
                                fs.Read(writeArray, 0, System.Convert.ToInt32(fs.Length));

                                //Close the File Stream
                                fs.Close();

                                // Create a synchronization object that gets 
                                // signaled when verification is complete.
                                ManualResetEvent manualEvent = new ManualResetEvent(false);

                                FileStream fStream = new FileStream("X:\\\\archive\\file.dat", FileMode.Create, FileAccess.ReadWrite, FileShare.None, 4096, true);

                                // Check that the FileStream was opened asynchronously.
                                Debug.Print("fStream was {0}opened asynchronously.", fStream.IsAsync ? "" : "not ");

                                // Asynchronously write to the file.
                                IAsyncResult asyncResult = fStream.BeginWrite
                                    (
                                    writeArray,
                                    0,
                                    writeArray.Length,
                                    new AsyncCallback(EndWriteCallback),
                                    new State(fStream, writeArray, manualEvent)
                                    );

This works, but performing

fs.Read(writeArray, 0, System.Convert.ToInt32(fs.Length));

essentially copies the file contents back to across the network

Tarakeshwar Reddy

Out of curiosity, will File.Copy[^] not work for you? Nevermind, just saw your other thread and you have already mentioned about the delay in File.Copy

PIEBALDconsult

What about File.Move? If you really want to copy, then something has to read the entire file.

Vikram A Punathambekar

Well, you have to first read it in order to copy it, so I doubt what you're asking is possible.

Cheers, Vikram. (Got my troika of CCCs!)