C#学习教程:如何使用C#将多个文件从FTP服务器传输到本地目录?分享


如何使用C#将多个文件从FTP服务器传输到本地目录?

我可以将一个文件从ftp服务器传输到本地目录。 使用以下代码

using (WebClient ftpClient = new WebClient()) { ftpClient.Credentials = new System.Net.NetworkCredential("username", "password"); ftpClient.DownloadFile("ftp://website.com/abcd.docx", @"D:\WestHamtest.docx"); 

但我不知道如何传输多个文件。 任何人都可以帮助我。 }

使用此代码,只需替换用户凭据:

 static void Main(string[] args) { FtpWebRequest ftpRequest = (FtpWebRequest)WebRequest.Create("ftp://mywebsite.com/"); ftpRequest.Credentials = new NetworkCredential("user345", "pass234"); ftpRequest.Method = WebRequestMethods.Ftp.ListDirectory; FtpWebResponse response = (FtpWebResponse)ftpRequest.GetResponse(); StreamReader streamReader = new StreamReader(response.GetResponseStream()); List directories = new List(); string line = streamReader.ReadLine(); while (!string.IsNullOrEmpty(line)) { directories.Add(line); line = streamReader.ReadLine(); } streamReader.Close(); using (WebClient ftpClient = new WebClient()) { ftpClient.Credentials = new System.Net.NetworkCredential("user345", "pass234"); for (int i = 0; i <= directories.Count-1; i++) { if (directories[i].Contains(".")) { string path = "ftp://mywebsite.com/" + directories[i].ToString(); string trnsfrpth = @"D:\Test" + directories[i].ToString(); ftpClient.DownloadFile(path, trnsfrpth); } } } 

非常好而简单的库FluentFTP

看看这个;

我的配置文件:

还有一点FTP库:

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 namespace FTPDownloadAdapter { class Program { private static readonly string FtpHost = ConfigurationManager.AppSettings["FtpHost"]; private static readonly string FtpUser = ConfigurationManager.AppSettings["FtpUser"]; private static readonly string FtpPassword = ConfigurationManager.AppSettings["FtpPassword"]; private static readonly string FtpDirectory = ConfigurationManager.AppSettings["FtpDirectory"]; private static readonly string FileExtension = ConfigurationManager.AppSettings["FileExtension"]; private static readonly string DownloadTo = ConfigurationManager.AppSettings["DownloadTo"]; private static readonly string DeleteFilesAfterDownload = ConfigurationManager.AppSettings["DeleteFilesAfterDownload"]; static void Main(string[] args) { try{ DownloadFiles(); } catch (Exception er){ Console.WriteLine(er.ToString()); } } private static void DownloadFiles(){ // create an FTP client var client = new FtpClient(FtpHost) { Credentials = new NetworkCredential(FtpUser, FtpPassword) }; // if you don't specify login credentials, we use the "anonymous" user account // begin connecting to the server client.Connect(); Console.WriteLine($"Retrieving files with extension [{FileExtension}] from directory [{FtpDirectory}]"); foreach (FtpListItem item in client.GetListing(FtpDirectory)){ // if this is a file if (item.Type == FtpFileSystemObjectType.File && (Path.GetExtension(item.FullName) == FileExtension)){ // get the file size long size = client.GetFileSize(item.FullName); // get modified date/time of the file or folder DateTime time = client.GetModifiedTime(item.FullName); // calculate a hash for the file on the server side (default algorithm) FtpHash hash = client.GetHash(item.FullName); // download the file var fileName = Path.GetFileName(item.FullName); var saveFilePath = Path.Combine(DownloadTo, fileName ?? throw new InvalidOperationException("File Appears to not have a name")); Console.WriteLine($"Downloading file: {fileName}"); client.DownloadFile(localPath: saveFilePath, remotePath: item.FullName); if (DeleteFilesAfterDownload == "true") { Console.WriteLine($"DeleteFilesAfterDownload is true, Deleting file from FTP : {item.FullName}"); client.DeleteFile(item.FullName); Console.WriteLine("File deletion success"); } else { Console.WriteLine($"DeleteFilesAfterDownload not true, skip deleting : {item.FullName}"); } } } } } } 

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