(VB.NET UWP/WinRT) SFTP Read Text File

Demonstrates how to open a text file on the SSH server and read text.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

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

Dim sftp As New Chilkat.SFtp

' Set some timeouts, in milliseconds:
sftp.ConnectTimeoutMs = 5000
sftp.IdleTimeoutMs = 15000

' Connect to the SSH server.  
' The standard SSH port = 22
' The hostname may be a hostname or IP address.
Dim hostname As String = "sftp.example.com"
Dim port As Integer = 22
Dim success As Boolean = Await sftp.ConnectAsync(hostname,port)
If (success <> True) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


' Authenticate with the SSH server.  Chilkat SFTP supports
' both password-based authenication as well as public-key
' authentication.  This example uses password authenication.
success = Await sftp.AuthenticatePwAsync("myLogin","myPassword")
If (success <> True) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


' After authenticating, the SFTP subsystem must be initialized:
success = Await sftp.InitializeSftpAsync()
If (success <> True) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


' Open a file for reading.
Dim handle As String
handle = Await sftp.OpenFileAsync("myTest.txt","readOnly","openExisting")
If (sftp.LastMethodSuccess <> True) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


' Assume the file we are reading contains the following text:
' abcdefghijklmnopqrstuvwxyz1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ
' (in ANSI format -- i.e. one byte per char).

' Read 26 bytes:
Dim sText As String
sText = Await sftp.ReadFileTextAsync(handle,26,"ansi")
If (sftp.LastMethodSuccess <> True) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


' Should print "abcdefghijklmnopqrstuvwxyz"
Debug.WriteLine(sText)

' Read the next 10 bytes.
sText = Await sftp.ReadFileTextAsync(handle,10,"ansi")
If (sftp.LastMethodSuccess <> True) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


' Should print "1234567890"
Debug.WriteLine(sText)

' Read the next 26 bytes.
sText = Await sftp.ReadFileTextAsync(handle,26,"ansi")
If (sftp.LastMethodSuccess <> True) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


' Should print "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
Debug.WriteLine(sText)

' Close the file.
success = Await sftp.CloseHandleAsync(handle)
If (success <> True) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("Success.")