VB.NET

Restart/Resume FTP Download

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Resume downloading a file from an FTP server. VB.NET

Dim success As Boolean = False

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

Dim ftp As 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) Then
    Debug.WriteLine(ftp.LastErrorText)
    Exit Sub
End If


' 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) Then
    Debug.WriteLine(ftp.LastErrorText)
    Exit Sub
End If


' 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

Dim localFilename As String = "big.zip"
Dim remoteFilename As String = "big.zip"

' Resume downloading...
success = ftp.GetFile(remoteFilename,localFilename)
If (success <> True) Then
    Debug.WriteLine(ftp.LastErrorText)
    Exit Sub
End If


success = ftp.Disconnect()

Debug.WriteLine("File Downloaded!")