Cancel an operation

To abort a file transfer that is still in progress, you can either call the Cancel method or close the connection by calling the Disconnect or DisconnectAsync method.

The following code snippet shows how to use it.

using System;
using ComponentPro.IO;
using ComponentPro.Net;

...

private static void Main()
{
    // Create a new Ftp instance. 
    Ftp client = new Ftp();

    // Connect to the FTP server. 
    client.Connect("demo.componentpro.com");

    // Authenticate. 
    client.Authenticate("test", "test");

    try 
    {
        // Register an event handler. 
        client.Progress += client_Progress;

        // Upload file "c:\test.zip". 
        client.UploadFile("c:\\test.zip", "test.zip");
    }
    catch (FtpException exc)
    {
        Console.WriteLine("Exception: " + exc.Message);
    }

    // Disconnect. 
    client.Disconnect();
}

private static void client_Progress(object sender, FileSystemProgressEventArgs e)
{
    // Abort the uploading operation if the bytes transferred is greater than or equal to 500Kb. 
    if (e.State == TransferState.Uploading && e.BytesTransferred >= 1024*500)
    {
        ((Ftp) sender).Cancel();
    }
}

Imports ComponentPro.IO
Imports ComponentPro.Net

...

Public Shared Sub Main()
    ' Create a new Ftp instance. 
    Dim client As New Ftp()

    ' Connect to the FTP server. 
    client.Connect("demo.componentpro.com")

    ' Authenticate. 
    client.Authenticate("test", "test")

    Try 
        ' Register an event handler. 
        AddHandler client.Progress, AddressOf client_Progress

        ' Upload file "c:\test.zip". 
        client.UploadFile("c:\test.zip", "test.zip")
    Catch exc As FtpException
        Console.WriteLine("Exception: " & exc.Message)
    End Try 
 
    ' Disconnect. 
    client.Disconnect()
End Sub 
 
Private Shared Sub client_Progress(ByVal sender As Object, ByVal e As FileSystemProgressEventArgs)
    ' Abort the uploading operation if the bytes transferred is greater than or equal to 500Kb. 
    If e.State = TransferState.Uploading AndAlso e.BytesTransferred >= 1024*500 Then 
        CType(sender, Ftp).Cancel()
    End If 
End Sub