Question

我使用FTPwebrequest创建了一个自动ftp文件下载程序。其中，有没有可能使用Asynchrounous和线程概念同时下载多个文件？。我需要一些指导或教程来进行asynchrounous ftp文件下载。请指导我。

Answer 1

也许这个vb代码可以提供帮助：

' begin asynchronous transfer '
Dim asyncResult As IAsyncResult
asyncResult = ftp.BeginGetFile( _
    remotePath, _
    localPath, _
    New AsyncCallback(AddressOf MyCallback), _
    Nothing _
 )

Do 
    ' do something else here... '
Loop While Not asyncResult.IsCompleted

' get the result '
Dim bytes As Long 
bytes = ftp.EndGetFile(asyncResult)

代码source

Answer 2

您可以通过该代码从Internet异步下载文件，但我不知道它是否适用于ftp。无论如何，试一试。

Dim client as new webclient
AddHandler client.DownloadFileCompleted, AddressOf DownloadFileCallback 
client.downloadfileasync(New Uri("link"), _
                   path) 

Private Sub DownloadFileCallback(sender As Object, e As System.ComponentModel.AsyncCompletedEventArgs)
'What to do when the download was completed.
End sub

希望答案有所帮助

vb.net中的异步ftp客户端（文件下载）

2 个答案: