Chilkat Examples

ChilkatHOME.NET Core C#Android™AutoItCC#C++Chilkat2-PythonCkPythonClassic ASPDataFlexDelphi ActiveXDelphi DLLGoJavaLianjaMono C#Node.jsObjective-CPHP ActiveXPHP ExtensionPerlPowerBuilderPowerShellPureBasicRubySQL ServerSwift 2Swift 3,4,5...TclUnicode CUnicode C++VB.NETVBScriptVisual Basic 6.0Visual FoxProXojo Plugin

VB.NET Examples

Web API Categories

ASN.1
AWS KMS
AWS Misc
Amazon EC2
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Async
Azure Cloud Storage
Azure Key Vault
Azure Service Bus
Azure Table Service
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Code Signing
Compression
DKIM / DomainKey
DNS
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
EBICS
ECC
Ed25519
Email Object
Encryption
FTP
FileAccess
Firebase
GMail REST API
GMail SMTP/IMAP/POP
Geolocation
Google APIs
Google Calendar
Google Cloud SQL
Google Cloud Storage
Google Drive
Google Photos
Google Sheets
Google Tasks
Gzip
HTML-to-XML/Text
HTTP

HTTP Misc
IMAP
JSON
JSON Web Encryption (JWE)
JSON Web Signatures (JWS)
JSON Web Token (JWT)
Java KeyStore (JKS)
MHT / HTML Email
MIME
MS Storage Providers
Microsoft Graph
Misc
NTLM
OAuth1
OAuth2
OIDC
Office365
OneDrive
OpenSSL
Outlook
Outlook Calendar
Outlook Contact
PDF Signatures
PEM
PFX/P12
PKCS11
POP3
PRNG
REST
REST Misc
RSA
SCP
SCard
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
ScMinidriver
SharePoint
SharePoint Online
Signing in the Cloud
Socket/SSL/TLS
Spider
Stream
Tar Archive
ULID/UUID
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl

 

 

 

(VB.NET) Async SFTP Progress Info

Demonstrates checking for progress info updates when running a task asynchronously. This example demonstrates an SFTP download.

Chilkat .NET Downloads

Chilkat .NET Assemblies

Chilkat for .NET Core

Chilkat for Mono

' All Chilkat classes can be unlocked at once at the beginning of a program
' by calling UnlockBundle.  It requires a Bundle unlock code.
Dim chilkatGlob As New Chilkat.Global
Dim success As Boolean = chilkatGlob.UnlockBundle("Anything for 30-day trial.")
If (success <> True) Then
    Debug.WriteLine(chilkatGlob.LastErrorText)
    Exit Sub
End If



Dim sftp As New Chilkat.SFtp

' Set some timeouts, in milliseconds:
sftp.ConnectTimeoutMs = 15000
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 = "www.my-ssh-server.com"
Dim port As Integer = 22
success = sftp.Connect(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 = sftp.AuthenticatePw("myLogin","myPassword")
If (success <> True) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


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



' --------------------
' Download a file
' --------------------
Dim localFilePath As String = "c:/temp/hamlet.xml"
Dim remoteFilePath As String = "subdir1/subdir2/hamlet.xml"

' Call the async version of the DownloadFileByName method to return a task object.
' The task object is loaded, but is in the Inert state -- meaning it is
' not yet scheduled to run on Chilkat's background thread pool.
Dim task As Chilkat.Task = sftp.DownloadFileByNameAsync(remoteFilePath,localFilePath)
If (sftp.LastMethodSuccess = False) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


' Before starting the task, tell it to keep an in-memory log of what would've been
' ProgressInfo callbacks.
task.KeepProgressLog = True

' Schedule the task for running on the thread pool.  This changes the task's state
' from Inert to Live.
success = task.Run()
If (success <> True) Then
    Debug.WriteLine(task.LastErrorText)

    Exit Sub
End If


' The application is now free to do anything else
' while the file is being downloaded.

' For this example, we'll simply sleep and periodically
' check to see if the download is finished, and report the progress
' along the way.
Dim curPctDone As Integer = 0
Dim name As String
Dim value As String

While task.Finished <> True

    If (task.PercentDone <> curPctDone) Then
        curPctDone = task.PercentDone
        Debug.WriteLine(curPctDone & " percent done")
    End If


    ' Check the progress info log.
    ' Emit any log entries..
    While (task.ProgressLogSize > 0)
        ' Get the 1st entry, emit it, and then remove it..
        name = task.ProgressInfoName(0)
        value = task.ProgressInfoValue(0)

        ' Entries reporting the received byte count will have the name "RcvByteCount"
        ' Entries reporting the current bytes-per-second will have the name "RcvBytesPerSec"

        Debug.WriteLine(name & ": " & value)
        task.RemoveProgressInfo(0)
    End While

    ' Sleep 100 ms.
    task.SleepMs(100)

End While

' Just in case there are any remaining entries...
While (task.ProgressLogSize > 0)
    ' Get the 1st entry, emit it, and then remove it..
    name = task.ProgressInfoName(0)
    value = task.ProgressInfoValue(0)
    Debug.WriteLine(name & ": " & value)
    task.RemoveProgressInfo(0)
End While


' A finished task could be one that was canceled, aborted, or truly finished.  

' If the task was "canceled", it was canceled prior to actually starting.  This could
' happen if the task was canceled while waiting in a thread pool queue to be scheduled by Chilkat's
' background thread pool scheduler.  

' If the task was "aborted", it indicates that it was canceled while running in a background thread.  
' The ResultErrorText will likely indicate that the task was aborted.

' If the task "completed", then it ran to completion, but the actual success/failure of the method
' is determined by the result obtained via a GetResult* method.  (A "completed" task will
' have a StatusInt equal to 7.   If the task finished, but was not completed, then it must've
' been aborted or canceled:
If (task.StatusInt <> 7) Then
    Debug.WriteLine("Task did not complete.")
    Debug.WriteLine("task status: " & task.Status)

    Exit Sub
End If


' The DownloadFileByName method returns a boolean.  Therefore, after the task is finished,
' we can get the boolean result by calling GetResultBool.  This is the return value had
' we called DownloadFileByName synchronously.
success = task.GetResultBool()
If (success <> True) Then
    ' The task's ResultErrorText contains what would have been in the LastErrorText property had
    ' the DownloadFileByName method been called synchronously.
    Debug.WriteLine(task.ResultErrorText)
Else
    Debug.WriteLine("File downloaded asynchronously.")
End If




 

© 2000-2024 Chilkat Software, Inc. All Rights Reserved.