一个子程序是有关从FTP服务器上下载文件的。
Sub getFileFromFTP(ByVal localFile As String, ByVal remoteFile As String, ByVal host As String, ByVal username As String, ByVal password As String)
Dim URI As String = host & remoteFile
Dim ftp As System.Net.FtpWebRequest = CType(FtpWebRequest.Create(URI), FtpWebRequest)
ftp.Credentials = New System.Net.NetworkCredential(username, password)
ftp.KeepAlive = False
'we want a binary transfer, not textual data
ftp.UseBinary = False
'Define the action required (in this case, download a file)
ftp.Method = System.Net.WebRequestMethods.Ftp.DownloadFile
Using response As System.Net.FtpWebResponse = CType(ftp.GetResponse, System.Net.FtpWebResponse)
Using responseStream As IO.Stream = response.GetResponseStream
'loop to read & write to file
Using fs As New IO.FileStream(localFile, IO.FileMode.Create)
Dim buffer(2047) As Byte
Dim read As Integer = 0
Do
read = responseStream.Read(buffer, 0, buffer.Length)
fs.Write(buffer, 0, read)
Loop Until read = 0 'see Note(1)
responseStream.Close()
fs.Flush()
fs.Close()
End Using
responseStream.Close()
End Using
response.Close()
End Using
End Sub
