Restart/Resume FTP Download

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Resume downloading a file from an FTP server.

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

bool success;

//  Any string unlocks the component for the 1st 30-days.
success = ftp.UnlockComponent("Anything for 30-day trial");
if (success != true) {
    MessageBox.Show(ftp.LastErrorText);
    return;
}

ftp.Hostname = "ftp.chilkatsoft.com";
ftp.Username = "****";
ftp.Password = "****";

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

//  Change to the remote directory where the file is located.
//  This step is only necessary if the file is not in the root directory
//  for the FTP account.
success = ftp.ChangeRemoteDir("temp");
if (success != true) {
    MessageBox.Show(ftp.LastErrorText);
    return;
}

//  To resume a download, it is assumed that the partial file
//  is already present on the local filesystem.
//  You only need to set the RestartNext property to resume
//  the download.  The Chilkat FTP component sets the resume
//  point by getting the existing size of the target (local) file.
ftp.RestartNext = true;

string localFilename;
localFilename = "big.zip";
string remoteFilename;
remoteFilename = "big.zip";

//  Resume downloading...
success = ftp.GetFile(remoteFilename,localFilename);
if (success != true) {
    MessageBox.Show(ftp.LastErrorText);
    return;
}

ftp.Disconnect();

MessageBox.Show("File Downloaded!");