C#

Restart/Resume FTP Upload

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Demonstrates how to restart / resume an FTP upload. C#

bool success = false;

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

Chilkat.Ftp2 ftp = new Chilkat.Ftp2();

ftp.Hostname = "ftp.example.com";
ftp.Username = "login";
ftp.Password = "password";

//  Connect and login to the FTP server.
success = ftp.Connect();
if (success != true) {
    Debug.WriteLine(ftp.LastErrorText);
    return;
}

//  Change to the remote directory where the file will be uploaded.
success = ftp.ChangeRemoteDir("temp");
if (success != true) {
    Debug.WriteLine(ftp.LastErrorText);
    return;
}

//  In this example, assume that a previous FTP upload failed,
//  and the incomplete file (bigFile.zip) exists on the FTP server.
//  You only need to set the RestartNext property to resume
//  the upload.  When RestartNext is set, the next call
//  to PutFile (or PutFileFromBinaryData, PutFileFromTextData)
//  will automatically resume the upload from the point of failure.
//  (The way it works is that the FTP component sends a "SIZE";
//  command to the FTP server to find out how many bytes of
//  the file already exist on the server.  It then begins
//  uploading from that point.

//  Note: After PutFile is called, the RestartNext property
//  is automatically set to false.
ftp.RestartNext = true;

//  Upload a file with restart.
string localFilename = "bigFile.zip";
string remoteFilename = "bigFile.zip";

success = ftp.PutFile(localFilename,remoteFilename);
if (success != true) {
    Debug.WriteLine(ftp.LastErrorText);
    return;
}

success = ftp.Disconnect();

Debug.WriteLine("File Uploaded!");