(VB.NET UWP/WinRT) FTP Sync Download Tree w/ Must-Match Constraints

Demonstrates how synchronize a directory tree in the download direction, but only for files matching a set of wildcard filenames.

Note: This example requires Chilkat v9.5.0.76 or greater.

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.something.com"
ftp.Username = "my_login"
ftp.Password = "my_password"

' 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


' Set the current remote directory to the root of
' the tree to be downloaded.
success = Await ftp.ChangeRemoteDirAsync("/subDir1")
If (success <> True) Then
    Debug.WriteLine(ftp.LastErrorText)
    Exit Sub
End If


' Possible synchronization modes are:
' mode=0: Download all files
' mode=1: Download all files that do not exist on the local filesystem.
' mode=2: Download newer or non-existant files.
' mode=3: Download only newer files. If a file does not already exist on the local filesystem, it is not downloaded from the server..
' mode=5: Download only missing files or files with size differences.
' mode=6: Same as mode 5, but also download newer files.

' This example will download all files, but only those files having filenames
' that match *.gif and *.eml

' Imagine our remote directory tree has these files and directories:

' 	accentedLatin1.txt
' 	accentedUtf8.txt
' 	alice.key
' 	anter_cert.pem
' 	chiliPepper.gif
' 	helloWorld.pdf
' 	abc/chiliPepper.gif
' 	abc/ghk/
' 	data/chiliPepper.gif
' 	data/xyz/dkimHtmlBody.txt
' 	data/xyz/dkimVerifyTest.eml
' 	data/xyz/emailForCreateDsn.eml
' 	text/frenchUtf8.txt
' 	text/helloWorld.txt
' 	text/PolishEmailBody.txt
' 	text/something/

' Indicate that we only want to create auto-create local directories (if needed)
' for the files that are actually downloaded.  If SyncCreateAllLocalDirs remains
' True, then the corresponding local directory is created for each remote directory
' traversed regardless of whether files within are downloaded.
ftp.SyncCreateAllLocalDirs = False

ftp.SyncMustMatch = "*.eml; *.gif"
Dim mode As Integer = 0
success = Await ftp.SyncLocalTreeAsync("c:/temp/subDir1",mode)
If (success <> True) Then
    Debug.WriteLine(ftp.LastErrorText)
    Exit Sub
End If


success = Await ftp.DisconnectAsync()

' Show the files downloaded.
Debug.WriteLine(ftp.SyncedFiles)

' Output showing the files downloaded:

' chiliPepper.gif
' abc/chiliPepper.gif
' data/chiliPepper.gif
' data/xyz/dkimVerifyTest.eml
' data/xyz/emailForCreateDsn.eml