Ftp .NET Component

The Ftp component is a powerful and flexible component-based implementation of the File Transfer Protocol (with security extentions). High-level properties and methods provide quick code creation and ease-of use, while access to lower-level properties and methods provide power and control. Here are some feature highlights:

• Authenticates and encrypts/decrypts transferred data using SSL2, SSL3, PCT or TLS. Non-secure mode is used when privacy is not required.
• Transfers multiple files, including directory trees, with a single line of code. Also, deletes directory trees with a single line.
• Optionally pipelines file data by providing direct stream access to the data connection.
• Supports both asynchronous (event-driven) and synchronous (scripted) application designs.
• Supports explicit and implicit SSL, with secure or clear data connections.
• Resumes interrupted transfers, and aborts transfers without losing the session connection.
• Supports large file transfers, with sizes greater than 4 GB.
• Progress event reports data sent and received in real-time.
• Automatically parses listings into easy-to-use objects.
• Performs ASCII or Binary transfers, in both Passive and Active modes.
• Any custom command can be sent to the server.
• Creates and deletes folders on the server.
• Trace event provides access to the underlying communication, making logging and debugging sessions easy.
• Transfers files through all common firewalls and proxies, including Socks 4/5, Ftp SITE, Ftp USER, Ftp OPEN, Http CONNECT, and more. Transfers files securely from behind Network Address Translating (NAT) routers.
• Can be used to create traditional client applications and services, as well as scalable server-based ASP.NET applications.
• Customizable certificate authentication provides complete control over what is accepted or rejected from the server. Client certificates are also supported.
• CertificateStore class interfaces with certificates in Microsoft Certificate Stores, or simply loads exported certificate files from disk.

Looking for the ActiveX version of this component?

Interface

Code Example

How easy is it to use the Ftp component? The following example demonstrates transferring files securely.

VB.NET Example
Private Sub SecureTest()
   ' Set the server & user info
   Ftp1.Server = "myftpserver"
   Ftp1.ServerPort = 21
   Ftp1.Username = "user"
   Ftp1.Password = "pass"

   ' "Enable" certificate authentication (verify any certificate the server sends)
   Ftp1.UseAuthentication = True

   ' Set the desired security/authentication to explicit. 
   Ftp1.Security = Dart.PowerTCP.SecureFtp.Security.Explicit

   ' Execute a command (this will cause an SSL connection to be made first
   ' and the data will be sent securely)
   Dim dir As String = Ftp1.GetDirectory()
   Debug.WriteLine("Current directory: " + dir)

   ' Close the connection.
   Ftp1.Close()
End Sub

Private Sub Ftp1_CertificateReceived(ByVal sender As Object, e As _
Dart.PowerTCP.SecureFtp.CertificateReceivedEventArgs) Handles Ftp1.CertificateReceived
   Dim msg As String = ""

   ' Check to see if the certificate is from a trusted root.
   If Not e.TrustedRoot Then
      msg += "This certificate is not from a trusted root" + vbCrLf
   End If

   ' Check to see if the certificate has a valid date.
   If Not e.ValidDate Then
      msg += "This certificate does not have a valid date" + vbCrLf
   End If

   ' Check to see if the certificate has a valid name.
   If Not e.ValidName Then
      msg += "This certificate does not have a valid name" + vbCrLf
   End If
   
   If msg <> "" Then
      msg += "Would you like to accept this certificate anyway?"
      If MessageBox.Show(msg, "Invalid Cert Received", MessageBoxButtons.YesNo)_
       = DialogResult.Yes Then
         ' User wants to accept the invalid cert. Accept it.
         e.Accept = True
      End If
   End If
End Sub