(VB.NET) FTP Download Binary File to a Stream

Demonstrates how to FTP download a binary file to a Chilkat stream.

Note: This example requires Chilkat v9.5.0.67 or greater.

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

' This example assumes the Chilkat FTP2 API to have been previously unlocked.
' See FTP2 Unlock Sample for sample code.

Dim ftp As New Chilkat.Ftp2

ftp.Hostname = "www.my-ftp-server.com"
ftp.Username = "mFtpLogin"
ftp.Password = "myFtpPassword"
ftp.AuthTls = True
ftp.Passive = True

' Connect and login to the FTP server using TLS.
Dim success As Boolean = ftp.Connect()
If (success <> True) Then
    Debug.WriteLine(ftp.LastErrorText)
    Exit Sub
End If


' We'll read the incoming data chunk-by-chunk and write to an output file.
Dim fac As New Chilkat.FileAccess
success = fac.OpenForWrite("qa_output/penguins2.jpg")
If (success <> True) Then
    Debug.WriteLine(fac.LastErrorText)
    Exit Sub
End If


Dim streamObj As New Chilkat.Stream

' Create a task to do the FTP download.
Dim t As Chilkat.Task = ftp.GetFileToStreamAsync("penguins2.jpg",streamObj)
If (ftp.LastMethodSuccess <> True) Then
    Debug.WriteLine(ftp.LastErrorText)
    Exit Sub
End If


' Start the task in a background thread.
t.Run()

Dim bd As New Chilkat.BinData
While streamObj.EndOfStream <> True
    ' Get the next chunk of JPG bytes.
    streamObj.ReadBd(bd)
    ' Do something with it..
    ' In this simple example, we'll just write to the file.
    fac.FileWriteBd(bd,0,0)
    ' Clear for the next read.
    bd.Clear()
End While

fac.FileClose()



Debug.WriteLine("Success.")