Sync Local Folder to FTP Server Folder without Upload Existing Files by SSIS Package - SQL Server Integration Services(SSIS) Tutorial

Scenario:

We have multiple business users who put the files in our Local Folder so we can upload them to FTP Server Folder. There are changes they will put the same file again after making some corrections, but we don't want to upload any file that has been already loaded. In simple we want to upload only the files from Local Folder to FTP Server which are not uploaded. The package can run every hour and compare the files on Local Folder and FTP Server and then upload newly arrived files to Local Folder.

Solution:

This is kind of complex situation, SSIS does provide us FTP Task that can be used to upload the files but it does not provide option to ignore the upload if file already exists. It does have the capability of overwriting the file in destination ( Remote) but we don't want to overwrite existing files.

For this requirement, we will be using Script task.

Things you will learn in this video
How to Create an SSIS Package from basics
How to create variables in SSIS Package for Local Path, Remote Path,Filename
How to use For-each Loop Container to loop through files from Local Folder
How to check if files exits on FTP Server or Not, If not then Upload it
How to use FTP Connection Manager in Script Task

Script to Sync Local Folder to FTP Folder by using VB.Net in SSIS Package

        Dim StrFolderArrary AsString()
Dim StrFileArray AsString()
Dim RemoteDirectory AsString
Dim LocalFolder AsString
Dim LocalFileNames AsString()
Dim ForEachFileName AsString


'Set Local Variable values by using SSIS Package variables
        RemoteDirectory = Dts.Variables("User::RemoteFolder").Value.ToString()
        LocalFolder = Dts.Variables("User::LocalFolder").Value.ToString()
        ForEachFileName = Dts.Variables("User::FileName").Value.ToString()

Dim cm As ConnectionManager = Dts.Connections("FTPConnection") 'FTP connection manager name
Dim ftp As FtpClientConnection = 

New FtpClientConnection(cm.AcquireConnection(Nothing))

        ftp.Connect() 'Connecting to FTP Server

'Provide the Directory on which you are working on FTP Server
        ftp.SetWorkingDirectory(RemoteDirectory)

'Get all the files and Folders List
        ftp.GetListing(StrFolderArrary, StrFileArray)

'If there is no file in the folder, strFile Arry will contain nothing,
'So upload the file and then close the connection.

If StrFileArray IsNothingThen
            LocalFileNames = {LocalFolder + "/" + ForEachFileName}
            ftp.SendFiles(LocalFileNames, RemoteDirectory, False, True)
            ftp.Close()

'If file is not there then upload the file , if there exit the ftp server

Else
IfCType(StrFileArray, IList).Contains(ForEachFileName) Then
                ftp.Close()
                MessageBox.Show("File already exists")

Else
                LocalFileNames = {LocalFolder + "/" + ForEachFileName}
                ftp.SendFiles(LocalFileNames, RemoteDirectory, False, True)
                MessageBox.Show("Upload successfully")
EndIf
            ftp.Close()
End If