如何使用C＃从FTP下载大量文件？

我需要按计划的时间间隔运行一个控制台应用程序，只需从FTP站点下载.pgp文件。 必须下载FTP中的任何pgp文件。 我找到了示例代码来获取FTP的目录列表，并在此处写了：

FtpWebRequest req = (FtpWebRequest)WebRequest.Create("ftp://ourftpserver"); req.Method = WebRequestMethods.Ftp.ListDirectoryDetails; req.Credentials = new NetworkCredential("user", "pass"); FtpWebResponse response = (FtpWebResponse)req.GetResponse(); Stream responseStream = response.GetResponseStream(); StreamReader reader = new StreamReader(responseStream); Console.WriteLine(reader.ReadToEnd()); Console.WriteLine("Directory List Complete, status {0}", response.StatusDescription); reader.Close(); response.Close(); 

我该怎么做才能从目录列表中下载.pgp类型的所有文件并将它们保存在我们服务器上的本地目录中？

Answer 1

FtpWebRequest和FtpWebResponse对象确实设计为单个请求（即下载单个文件等）

您正在寻找FTP客户端。 .NET Framework中没有一个，但是有一个免费的， System.Net.FtpClient显然效果很好。

Answer 2

有一个非常好的库，您可以使用https://sshnet.codeplex.com/代码片段：您需要将文件夹路径作为localFilesPath和Ftp文件夹路径从您要下载的文件传递到remoteFTPPath。

 public static void DownloadFilesFromFTP(string localFilesPath, string remoteFTPPath) { using (var sftp = new SftpClient(Settings.Default.FTPHost, Settings.Default.FTPUsername, Settings.Default.FTPPassword)) { sftp.Connect(); sftp.ChangeDirectory(remoteFTPPath); var ftpFiles = sftp.ListDirectory(remoteFTPPath, null); StringBuilder filePath = new StringBuilder(); foreach (var fileName in ftpFiles) { filePath.Append(localFilesPath).Append(fileName.Name); string e = Path.GetExtension(filePath.ToString()); if (e == ".csv") { using (var file = File.OpenWrite(filePath.ToString())) { sftp.DownloadFile(fileName.FullName, file, null); sftp.Delete(fileName.FullName); } } filePath.Clear(); } sftp.Disconnect(); } } 

Answer 3

ftp下载文件的代码。

  FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://127.0.0.0/my.txt"); request.Method = WebRequestMethods.Ftp.DownloadFile; request.Credentials = new NetworkCredential("userid", "pasword"); FtpWebResponse response = (FtpWebResponse)request.GetResponse(); Stream responseStream = response.GetResponseStream(); FileStream file = File.Create(@c:\temp\my.txt); byte[] buffer = new byte[32 * 1024]; int read; //reader.Read( while ((read = responseStream.Read(buffer, 0, buffer.Length)) > 0) { file.Write(buffer, 0, read); } file.Close(); responseStream.Close(); response.Close(); 

Answer 4

终极FTP可以帮助你。 以下代码段演示了：

 using ComponentPro.IO; using ComponentPro.Net; ... // Create a new instance. Ftp client = new Ftp(); // Connect to the FTP server. client.Connect("myserver"); // Authenticate. client.Authenticate("userName", "password"); // ... // Get all directories, subdirectories, and files from remote folder '/myfolder' to 'c:\myfolder'. client.DownloadFiles("/myfolder", "c:\\myfolder"); // Get all directories, subdirectories, and files that match the specified search pattern from remote folder '/myfolder2' to 'c:\myfolder2'. client.DownloadFiles("/myfolder2", "c:\\myfolder2", "*.pgp"); // or you can simply put wildcard masks in the source path, our component will automatically parse it. // download all *.pgp files from remote folder '/myfolder2' to local folder 'c:\myfolder2'. client.DownloadFiles("/myfolder2/*.pgp", "c:\\myfolder2"); // Download *.pgp files from remote folder '/myfolder2' to local folder 'c:\myfolder2'. client.DownloadFiles("/myfolder2/*.pgp", "c:\\myfolder2"); // Get files in the folder '/myfolder2' only. TransferOptions opt = new TransferOptions(true, RecursionMode.None, false, (SearchCondition)null, FileExistsResolveAction.Overwrite, SymlinksResolveAction.Skip); client.DownloadFiles("/myfolder2", "c:\\myfolder2", opt); // ... // Disconnect. client.Disconnect(); 

http://www.componentpro.com/doc/ftp有更多例子。