FTP下载帮助类

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net;

namespace FTPHelper
{
    /// <summary>
    /// FTP帮助类
    /// </summary>
    public class FTPHelper
    {
        #region 字段

        private string ftpURI;
        private string ftpPort;
        private string ftpUserID;
        private string ftpServerIP;
        private string ftpPassword;
        private string ftpRemotePath;

        #endregion

        /// <summary>  
        /// 连接FTP服务器
        /// </summary>  
        /// <param name="FtpServerIP">FTP连接地址</param>  
        /// <param name="FtpRemotePath">指定FTP连接成功后的当前目录, 如果不指定即默认为根目录</param>  
        /// <param name="FtpUserID">用户名</param>  
        /// <param name="FtpPassword">密码</param>  
        public FTPHelper(string FtpServerIP, string FtpPort, string FtpUserID, string FtpPassword)
        {
            ftpServerIP = FtpServerIP;
            ftpPort = FtpPort;
            ftpUserID = FtpUserID;
            ftpPassword = FtpPassword;
            ftpURI = "ftp://" + ftpServerIP + ":" + ftpPort;
        }

        /// <summary>  
        /// 上传  
        /// </summary>   
        public void Upload(string filename)
        {
            FileInfo fileInf = new FileInfo(filename);
            FtpWebRequest reqFTP;
            reqFTP = (FtpWebRequest) FtpWebRequest.Create(new Uri(ftpURI + fileInf.Name));
            reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
            reqFTP.KeepAlive = false;
            reqFTP.UseBinary = true;
            reqFTP.ContentLength = fileInf.Length;
            int buffLength = 2048;
            byte[] buff = new byte[buffLength];
            int contentLen;
            FileStream fs = fileInf.OpenRead();
            try
            {
                Stream strm = reqFTP.GetRequestStream();
                contentLen = fs.Read(buff, 0, buffLength);
                while (contentLen != 0)
                {
                    strm.Write(buff, 0, contentLen);
                    contentLen = fs.Read(buff, 0, buffLength);
                }
                strm.Close();
                fs.Close();
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

        /// <summary>  
        /// 下载  
        /// </summary>   
        public void Download(string filePath, string fileName)
        {
            try
            {
                FileStream outputStream = new FileStream(filePath + "\\" + fileName, FileMode.Create);
                FtpWebRequest reqFTP;
                reqFTP = (FtpWebRequest) FtpWebRequest.Create(new Uri(ftpURI + fileName));
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
                reqFTP.UseBinary = true;
                FtpWebResponse response = (FtpWebResponse) reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();
                long cl = response.ContentLength;
                int bufferSize = 2048;
                int readCount;
                byte[] buffer = new byte[bufferSize];
                readCount = ftpStream.Read(buffer, 0, bufferSize);
                while (readCount > 0)
                {
                    outputStream.Write(buffer, 0, readCount);
                    readCount = ftpStream.Read(buffer, 0, bufferSize);
                }
                ftpStream.Close();
                outputStream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

        /// <summary>  
        /// 删除文件  
        /// </summary>  
        public void Delete(string fileName)
        {
            try
            {
                FtpWebRequest reqFTP;
                reqFTP = (FtpWebRequest) FtpWebRequest.Create(new Uri(ftpURI + fileName));
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;
                reqFTP.KeepAlive = false;
                string result = String.Empty;
                FtpWebResponse response = (FtpWebResponse) reqFTP.GetResponse();
                long size = response.ContentLength;
                Stream datastream = response.GetResponseStream();
                StreamReader sr = new StreamReader(datastream);
                result = sr.ReadToEnd();
                sr.Close();
                datastream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

        /// <summary>  
        /// 获取当前目录下明细(包含文件和文件夹)  
        /// </summary>  
        public string[] GetFilesDetailList()
        {
            try
            {
                StringBuilder result = new StringBuilder();
                FtpWebRequest ftp;
                ftp = (FtpWebRequest) FtpWebRequest.Create(new Uri(ftpURI));
                ftp.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                ftp.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
                WebResponse response = ftp.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream());
                string line = reader.ReadLine();
                line = reader.ReadLine();
                line = reader.ReadLine();
                while (line != null)
                {
                    result.Append(line);
                    result.Append("\n");
                    line = reader.ReadLine();
                }
                result.Remove(result.ToString().LastIndexOf("\n"), 1);
                reader.Close();
                response.Close();
                return result.ToString().Split('\n');
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

        /// <summary>  
        /// 获取FTP文件列表(包括文件夹)
        /// </summary>   
        private List<string> GetAllList(string url)
        {
            List<string> list = new List<string>();
            FtpWebRequest req = (FtpWebRequest) WebRequest.Create(new Uri(url));
            req.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
            req.Method = WebRequestMethods.Ftp.ListDirectory;
            req.UseBinary = true;
            req.UsePassive = true;
            try
            {
                using (FtpWebResponse res = (FtpWebResponse) req.GetResponse())
                {
                    using (StreamReader sr = new StreamReader(res.GetResponseStream()))
                    {
                        string s;
                        while ((s = sr.ReadLine()) != null)
                        {
                            list.Add(s);
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                throw (ex);
            }
            return list;
        }

        /// <summary>  
        /// 获取当前目录下文件列表(不包括文件夹)  
        /// </summary>  
        public int GetFileList(string url, out List<string> fileList, out List<string> folderList)
        {
            fileList = new List<string>();
            folderList = new List<string>();
            FtpWebRequest reqFTP;
            int sum=0;
            try
            {
                reqFTP = (FtpWebRequest) FtpWebRequest.Create(new Uri(url));
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
                WebResponse response = reqFTP.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream());
                string line = reader.ReadLine();
                while (line != null)
                {
                    bool isFolder = line.StartsWith("d");
                    if (!isFolder)
                    {
                        fileList.Add(line.Substring(49, line.Length - 49));
                    }
                    else
                    {
                        folderList.Add(line.Substring(49, line.Length - 49));
                    }
                    sum++;
                    line = reader.ReadLine();
                }

                reader.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                throw (ex);
            }
            return sum;

        }

        /// <summary>  
        /// 判断当前目录下指定的文件是否存在  
        /// </summary>  
        /// <param name="RemoteFileName">远程文件名</param>  
        public bool FileExist(string RemoteFileName)
        {
            List<string> fileList;
            List<string> folderList;
            GetFileList("*.*",out fileList,out folderList);
            foreach (string str in fileList)
            {
                if (str.Trim() == RemoteFileName.Trim())
                {
                    return true;
                }
            }
            return false;
        }

        /// <summary>  
        /// 创建文件夹  
        /// </summary>   
        public void MakeDir(string dirName)
        {
            FtpWebRequest reqFTP;
            try
            {
                reqFTP = (FtpWebRequest) FtpWebRequest.Create(new Uri(ftpURI + dirName));
                reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                FtpWebResponse response = (FtpWebResponse) reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();
                ftpStream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
            }
        }

        /// <summary>  
        /// 获取指定文件大小  
        /// </summary>  
        public long GetFileSize(string filename)
        {
            FtpWebRequest reqFTP;
            long fileSize = 0;
            try
            {
                reqFTP = (FtpWebRequest) FtpWebRequest.Create(new Uri(ftpURI + filename));
                reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                FtpWebResponse response = (FtpWebResponse) reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();
                fileSize = response.ContentLength;
                ftpStream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
            }
            return fileSize;
        }

        /// <summary>  
        /// 更改文件名  
        /// </summary> 
        public void ReName(string currentFilename, string newFilename)
        {
            FtpWebRequest reqFTP;
            try
            {
                reqFTP = (FtpWebRequest) FtpWebRequest.Create(new Uri(ftpURI + currentFilename));
                reqFTP.Method = WebRequestMethods.Ftp.Rename;
                reqFTP.RenameTo = newFilename;
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                FtpWebResponse response = (FtpWebResponse) reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();
                ftpStream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
            }
        }

        /// <summary>  
        /// 移动文件  
        /// </summary>  
        public void MovieFile(string currentFilename, string newDirectory)
        {
            ReName(currentFilename, newDirectory);
        }

        /// <summary>  
        /// 切换当前目录  
        /// </summary>  
        /// <param name="IsRoot">true:绝对路径 false:相对路径</param>  
        public void GotoDirectory(string DirectoryName, bool IsRoot)
        {

            if (IsRoot)
            {
                ftpRemotePath = DirectoryName;
            }
            else
            {
                ftpRemotePath += "/"+DirectoryName ;
            }
            ftpURI = "ftp://" + ftpServerIP +":"+ftpPort+ "/" + ftpRemotePath + "/";
        }


        public void DownloadDir(String remote, string local)
        {
            GotoDirectory(remote, true);
            if (!Directory.Exists(local))
                Directory.CreateDirectory(local);
            List<string> fileList;
            List<string> folderList;
            GetFileList(ftpURI, out fileList, out folderList);

            foreach (var file in fileList)
            {
                Console.WriteLine("{0}->{1}", file, local);
                Download(local, file);
            }

            foreach (var folder in folderList)
            {
                DownloadDir(remote + "/"+folder, local+@"\"+folder);
            }
        }


    }
}

读取xml并连接下载

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Linq;

namespace GetUNet
{
    class Program
    {
        static void Main()
        {
            XDocument doc = XDocument.Load(@".\ftpconfig.xml");
            var q = doc.Element("Config").Elements();
            var list = q.ToList();
            string ftpIP = string.Empty;
            string ftpUser = string.Empty;
            string ftpPwd = string.Empty;
            string ftpPort = string.Empty;
            string serverDirectory = string.Empty;
            string localDirectory = string.Empty;
            list.ForEach(u =>
                             {
                                 ftpIP=u.Element("ServerIP").Value;
                                 ftpUser = u.Element("FtpUser").Value;
                                 ftpPwd = u.Element("FtpPwd").Value;
                                 ftpPort = u.Element("Port").Value;
                                 localDirectory = u.Element("LocalDir").Value;
                                 serverDirectory = u.Element("RemoteDir").Value;

                             });

            var ftp = new FTPHelper(ftpIP, ftpPort, ftpUser, ftpPwd);
            ftp.DownloadDir(serverDirectory,localDirectory);



        }

    }
}