Write Bytes to a Remote SFTP File (BinData)

See more SFTP Examples

Demonstrates the Chilkat SFtp.WriteFileBd method, which appends all bytes in a BinData to the remote file identified by an open handle. The first argument is the handle and the second is the BinData.

Note: This example uses a relative local path, which is resolved against the application's current working directory. Absolute local paths may also be used. Supply the path appropriate to your own environment.

Background: This is the binary counterpart to WriteFileText — the right choice for images, archives, or any non-text content, where a charset conversion would corrupt the data. Combined with an appropriate OpenFile disposition it can create, overwrite, or append; here the file is created/truncated first so the result is exactly the BinData contents.

Chilkat C# Downloads

Download Chilkat for C#

bool success = false;

//  Demonstrates the SFtp.WriteFileBd method, which appends all bytes in a BinData to the remote
//  file identified by an open handle.  The 1st argument is the handle and the 2nd is the BinData.

Chilkat.SFtp sftp = new Chilkat.SFtp();

//  Connect, authenticate, and initialize the SFTP subsystem.
int port = 22;
success = sftp.Connect("sftp.example.com",port);
if (success == false) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

//  Normally you would not hard-code the password in source.  You should instead obtain it
//  from an interactive prompt, environment variable, or a secrets vault.
string password = "mySshPassword";

success = sftp.AuthenticatePw("mySshLogin",password);
if (success == false) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

success = sftp.InitializeSftp();
if (success == false) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

//  Open (creating/truncating) the remote file for writing.
string handle = sftp.OpenFile("subdir/image.png","writeOnly","createTruncate");
if (sftp.LastMethodSuccess == false) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

//  Put the bytes to write into a BinData.  (Here they are loaded from a local file, but the
//  bytes could come from anywhere.)
Chilkat.BinData bd = new Chilkat.BinData();
success = bd.LoadFile("qa_data/image.png");
if (success == false) {
    Debug.WriteLine(bd.LastErrorText);
    return;
}

//  Append the BinData bytes to the open remote file.
success = sftp.WriteFileBd(handle,bd);
if (success == false) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

success = sftp.CloseHandle(handle);
if (success == false) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

Debug.WriteLine("Wrote " + Convert.ToString(bd.NumBytes) + " bytes.");

sftp.Disconnect();