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C# ftp 上传、下载、删除

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C# ftp 上传、下载、删除

分类: [ 11 ] Ftp
[csharp] view plaincopyprint?
 
  1. public class FtpHelper  
  2.    {  
  3.        public static readonly FtpHelper Instance = new FtpHelper();  
  4.   
  5.        /// <summary>  
  6.        /// 取得文件名  
  7.        /// </summary>  
  8.        /// <param name="ftpPath">ftp路径</param>  
  9.        /// <returns></returns>  
  10.        public string[] GetFilePath(string userId, string pwd, string ftpPath)  
  11.        {  
  12.            string[] downloadFiles;  
  13.            StringBuilder result = new StringBuilder();  
  14.            FtpWebRequest reqFTP;  
  15.            try  
  16.            {  
  17.                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpPath));  
  18.                reqFTP.UseBinary = true;  
  19.                reqFTP.Credentials = new NetworkCredential(userId, pwd);  
  20.                reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;  
  21.                reqFTP.UsePassive = false;  
  22.                WebResponse response = reqFTP.GetResponse();  
  23.                StreamReader reader = new StreamReader(response.GetResponseStream());  
  24.                string line = reader.ReadLine();  
  25.                while (line != null)  
  26.                {  
  27.                    result.Append(line);  
  28.                    result.Append("\n");  
  29.                    line = reader.ReadLine();  
  30.                }  
  31.                result.Remove(result.ToString().LastIndexOf(‘\n‘), 1);  
  32.                reader.Close();  
  33.                response.Close();  
  34.                return result.ToString().Split(‘\n‘);  
  35.            }  
  36.            catch (Exception ex)  
  37.            {  
  38.                downloadFiles = null;  
  39.                return downloadFiles;  
  40.            }  
  41.        }  
  42.   
  43.        //ftp的上传功能  
  44.        public void Upload(string userId, string pwd, string filename, string ftpPath)  
  45.        {  
  46.            FileInfo fileInf = new FileInfo(filename);  
  47.            FtpWebRequest reqFTP;  
  48.            // 根据uri创建FtpWebRequest对象   
  49.            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpPath + fileInf.Name));  
  50.            // ftp用户名和密码  
  51.            reqFTP.Credentials = new NetworkCredential(userId, pwd);  
  52.   
  53.            reqFTP.UsePassive = false;  
  54.            // 默认为true,连接不会被关闭  
  55.            // 在一个命令之后被执行  
  56.            reqFTP.KeepAlive = false;  
  57.            // 指定执行什么命令  
  58.            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;  
  59.            // 指定数据传输类型  
  60.            reqFTP.UseBinary = true;  
  61.            // 上传文件时通知服务器文件的大小  
  62.            reqFTP.ContentLength = fileInf.Length;  
  63.            // 缓冲大小设置为2kb  
  64.            int buffLength = 2048;  
  65.            byte[] buff = new byte[buffLength];  
  66.            int contentLen;  
  67.            // 打开一个文件流 (System.IO.FileStream) 去读上传的文件  
  68.            FileStream fs = fileInf.OpenRead();  
  69.            try  
  70.            {  
  71.                // 把上传的文件写入流  
  72.                Stream strm = reqFTP.GetRequestStream();  
  73.                // 每次读文件流的2kb  
  74.                contentLen = fs.Read(buff, 0, buffLength);  
  75.                // 流内容没有结束  
  76.                while (contentLen != 0)  
  77.                {  
  78.                    // 把内容从file stream 写入 upload stream  
  79.                    strm.Write(buff, 0, contentLen);  
  80.                    contentLen = fs.Read(buff, 0, buffLength);  
  81.                }  
  82.                // 关闭两个流  
  83.                strm.Close();  
  84.                fs.Close();  
  85.            }  
  86.            catch (Exception ex)  
  87.            {  
  88.   
  89.            }  
  90.        }  
  91.   
  92.        public void Delete(string userId, string pwd, string ftpPath, string fileName)  
  93.        {  
  94.            FtpWebRequest reqFTP;  
  95.            try  
  96.            {  
  97.                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpPath + fileName));  
  98.                reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;  
  99.                reqFTP.UseBinary = true;  
  100.                reqFTP.Credentials = new NetworkCredential(userId, pwd);  
  101.                reqFTP.UsePassive = false;  
  102.                FtpWebResponse listResponse = (FtpWebResponse)reqFTP.GetResponse();  
  103.                string sStatus = listResponse.StatusDescription;  
  104.            }  
  105.            catch (Exception ex)  
  106.            {  
  107.                throw ex;  
  108.            }  
  109.        }  
  110.   
  111.        //从ftp服务器上下载文件的功能  
  112.        public void Download(string userId, string pwd, string ftpPath, string filePath, string fileName)  
  113.        {  
  114.            FtpWebRequest reqFTP;  
  115.            try  
  116.            {  
  117.                FileStream outputStream = new FileStream(filePath + "\\" + fileName, FileMode.Create);  
  118.                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpPath + fileName));  
  119.                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;  
  120.                reqFTP.UseBinary = true;  
  121.                reqFTP.Credentials = new NetworkCredential(userId, pwd);  
  122.                reqFTP.UsePassive = false;  
  123.                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();  
  124.                Stream ftpStream = response.GetResponseStream();  
  125.                long cl = response.ContentLength;  
  126.                int bufferSize = 2048;  
  127.                int readCount;  
  128.                byte[] buffer = new byte[bufferSize];  
  129.                readCount = ftpStream.Read(buffer, 0, bufferSize);  
  130.                while (readCount > 0)  
  131.                {  
  132.                    outputStream.Write(buffer, 0, readCount);  
  133.                    readCount = ftpStream.Read(buffer, 0, bufferSize);  
  134.                }  
  135.                ftpStream.Close();  
  136.                outputStream.Close();  
  137.                response.Close();  
  138.   
  139.   
  140.            }  
  141.            catch (Exception ex)  
  142.            {  
  143.                throw ex;  
  144.            }  
  145.        }  
  146.   
  147.    }  

C# ftp 上传、下载、删除

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原文地址:http://www.cnblogs.com/aaaaq/p/4396372.html

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