C#从FTP服务器下载文件到本地

最新推荐文章于 2025-07-10 12:53:03 发布

蘑菇台灯

最新推荐文章于 2025-07-10 12:53:03 发布

阅读量3.6k

点赞数 2

CC 4.0 BY-SA版权

分类专栏： C#经验文章标签：服务器 c# 运维

本文链接：https://blog.youkuaiyun.com/qq_34739157/article/details/122533720

这篇博客介绍了一个使用C#编写的辅助类，该类能够帮助开发者从FTP服务器高效地将文件下载到本地计算机，适用于服务器管理和运维场景。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

提供一个helper类，从FTP服务器下载文件到本地

public class FTPHelper
    {
   
   
        public static FtpFileInfo[] GetFtpFileInfos(string ftpPath, string userName, string passWord)
        {
   
   
            LinkedList<FtpFileInfo> linkedList = new LinkedList<FtpFileInfo>();
            var reqFtp = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpPath));
            reqFtp.UsePassive = false;
            reqFtp.UseBinary = true;
            reqFtp.Credentials = new NetworkCredential(userName, passWord);
            reqFtp.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
            var response = (FtpWebResponse)reqFtp.GetResponse();
            var reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
            string fileDetail = reader.ReadLine();
            while (fileDetail != null)
            {
   
   
                linkedList.AddLast(new FtpFileInfo(fileDetail));
                fileDetail = reader.ReadLine();
            }
            reader.Close();
            response.Close();
            return linkedList.ToArray();
        }
        /// <summary>
        /// 从ftp下载文件夹到本地
        /// </summary>
        /// <param name="sourceDirectoryPath">源数据文件夹地址（备注：结尾不要“/”）</param>
        /// <param name="targetDirectoryPath">目标数据文件夹地址（备注：结尾不要“/”）</param>
        /// <param name="username">用户名</param>
        /// <param name="password">密码</param>
        public static bool DownLoadDirectory(string sourceDirectoryPath, string targetDirectoryPath, string username, string password)
        {
   
   
            try
            {
   
   
                var ftpFileInfos = GetFtpFileInfos(sourceDirectoryPath, username, password);
                if (ftpFileInfos != null && ftpFileInfos.Count() > 0)
                {
   
   
                    foreach (var file in ftpFileInfos)
                    {
   
   
                        string fullSourcePath = sourceDirectoryPath + "/" + file.FileName;
                        string fullTargetPath = targetDirectoryPath + "/" + file.FileName;
                        if (file.UnixFileType == "d")
                        {
   
   
                            if (!string.IsNullOrEmpty(file.FileName.Replace(".", "")))
                            {
   
   
                                DownLoadDirectory(fullSourcePath, fullTargetPath, username, password);
                            }
                        }
                        else
                        {
   
   
                            DownLoadFile(fullSourcePath, targetDirectoryPath, username, password);
                        }
                    }
                }
                return true;
            }catch
            {
   
   
                return false;
            }
            
        }
        /// <summary>
        /// 从ftp下载文件到本地文件夹
        /// </summary>
        /// <param name="fullSourcePath">ftp文件完整地址</param>
        /// <param name="targetDirectoryPath">目标文件夹路径</param>
        /// <param name="username">用户名</param>
        /// <param name="password">密码</param>
        public static void DownLoadFile(string