Chilkat Examples

ChilkatHOMEAndroid™Classic ASPCC++C#Mono C#.NET Core C#C# UWP/WinRTDataFlexDelphi ActiveXDelphi DLLVisual FoxProJavaLianjaMFCObjective-CPerlPHP ActiveXPHP ExtensionPowerBuilderPowerShellPureBasicCkPythonChilkat2-PythonRubySQL ServerSwift 2Swift 3,4,5...TclUnicode CUnicode C++Visual Basic 6.0VB.NETVB.NET UWP/WinRTVBScriptXojo PluginNode.jsExcelGo

VB.NET UWP/WinRT Examples

Web API Categories

ASN.1
Amazon EC2
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Azure Cloud Storage
Azure Service Bus
Azure Table Service
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Compression
DKIM / DomainKey
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
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
Socket/SSL/TLS
Spider
Stream
Tar Archive
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl

 

 

 

(VB.NET UWP/WinRT) FTP XCRC

Demonstrates how to tell Chilkat FTP2 to automatically verify an upload using XCRC. XCRC is an FTP extension supported by most FTP servers. If your FTP server does not support XCRC, then no XCRC command will be sent to verify the upload.

The XCRC command asks the FTP server to send an CRC checksum (hash) for the contents of a file. The client can then verify that the checksum matches the local file. The FTP2 Put* methods automatically do this when the AutoXcrc property is turned on.

Note: In order for the FTP2 component to know whether XCRC is supported by your FTP server, you must have the AutoFeat property turned on (which is the default setting). The AutoFeat property tells the FTP2 component to automatically request the FTP server features via the FEAT command after connecting.

Note: XCRC is new functionality that is present in the pre-release downloads at http://www.chilkatsoft.com/preRelease.asp, or in official new versions dated after 30-Oct-2007. If you have trouble, please contact support@chilkatsoft.com.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

' 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"

' Turn on the AutoXcrc property:
ftp.AutoXcrc = True

' Turn on session logging.  We'll want to examine it to
' see the XCRC command:
ftp.KeepSessionLog = True

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


' Change to the remote directory where the file will be uploaded.
success = Await ftp.ChangeRemoteDirAsync("junk")
If (success <> True) Then
    Debug.WriteLine(ftp.LastErrorText)
    Exit Sub
End If


' Upload a file.
Dim localFilename As String = "hamlet.xml"
Dim remoteFilename As String = "hamlet.xml"

success = Await ftp.PutFileAsync(localFilename,remoteFilename)
If (success <> True) Then
    Debug.WriteLine(ftp.LastErrorText)
    Exit Sub
End If


' If we examine the session log, we'll see the XCRC command:
Debug.WriteLine(ftp.SessionLog)

success = Await ftp.DisconnectAsync()

Debug.WriteLine("File Uploaded!")

' Here is the session log showing the XCRC command:

' 220 Serv-U FTP Server v6.3 for WinSock ready...
' .
' USER example-code.com
' 331 User name okay, need password.
' .
' PASS ****
' 230 User logged in, proceed.
' .
' TYPE I
' 200 Type set to I.
' .
' SYST
' 215 UNIX Type: L8
' .
' FEAT
' 211-Extension supported
'  CLNT
'  MDTM
'  MDTM YYYYMMDDHHMMSS[+-TZ];filename
'  SIZE
'  SITE PSWD;EXEC;SET;INDEX;ZONE;CHMOD;MSG
'  REST STREAM
'  XCRC filename;start;end
'  MODE Z
'  MLST Type*;Size*;Create;Modify*;Win32.ea*;
' 211 End
' .
' CWD junk
' 250 Directory changed to /junk
' .
' PORT 192,168,1,103,5,144
' 200 PORT Command successful.
' .
' STOR hamlet.xml
' 150 Opening BINARY mode data connection for hamlet.xml.
' 226 Transfer complete.
' .
' XCRC hamlet.xml
' 250 3C1933B

 

© 2000-2022 Chilkat Software, Inc. All Rights Reserved.