C # implement FTP upload,

C # implement FTP upload,

1 /// <summary> 2 /// Upload File 3 /// </summary> 4 /// <param name = "fileinfo"> file to be uploaded </param> 5 // <param name = "targetDir"> target path </param> 6 /// <param name = "hostname"> ftp address </param> 7 // /<param name = "username"> ftp username </param> 8 // <param name = "password"> ftp password </param> 9 public static void UploadFile (FileInfo fileinfo, string targetDir, string hostname, string username, string password) 10 {11 // 1. check Target 12 string target; 13 if (targetDir. trim () = "") 14 {15 return; 16} 17 target = Guid. newGuid (). toString (); // use the temporary file name 18 19 20 string URI = "FTP: //" + hostname + "/" + targetDir + "/" + target; 21 // WebClient webcl = new WebClient (); 22 System. net. ftpWebRequest ftp = GetRequest (URI, username, password); 23 24 // set the FTP command to be executed, 25 // ftp. method = System. net. webRequestMethods. ftp. listD IrectoryDetails; // assume that the file list in the specified path is displayed. 26 ftp. method = System. net. webRequestMethods. ftp. uploadFile; 27 // specifies the data type of file transmission 28 ftp. useBinary = true; 29 ftp. usePassive = true; 30 31 // tell the ftp file size 32 ftp. contentLength = fileinfo. length; 33 // set the buffer size to 2KB 34 const int BufferSize = 2048; 35 byte [] content = new byte [BufferSize-1 + 1]; 36 int dataRead; 37 38 // open a file stream (System. IO. fileStream) to read the uploaded file 39 using (FileS Tream fs = fileinfo. openRead () 40 {41 try 42 {43 // write the uploaded file to the Stream 44 using (Stream rs = ftp. getRequestStream () 45 {46 do 47 {48 // 2KB 49 dataRead = fs for each file stream read. read (content, 0, BufferSize); 50 rs. write (content, 0, dataRead); 51} while (! (DataRead <BufferSize); 52 rs. close (); 53} 54 55} 56 catch (Exception ex) {} 57 finally 58 {59 fs. close (); 60} 61 62} 63 64 ftp = null; 65 // set FTP command 66 ftp = GetRequest (URI, username, password); 67 ftp. method = System. net. webRequestMethods. ftp. rename; // renamed 68 ftp. renameTo = fileinfo. name; 69 try 70 {71 ftp. getResponse (); 72} 73 catch (Exception ex) 74 {75 ftp = GetRequest (URI, username, password); 76 ftp. method = System. net. webRequestMethods. ftp. deleteFile; // Delete 77 ftp. getResponse (); 78 throw ex; 79} 80 finally 81 {82 // fileinfo. delete (); 83} 84 85 // you can record a log "Upload" + fileinfo. fullName + "upload to" + "FTP: //" + hostname + "/" + targetDir + "/" + fileinfo. name + "successful. "); 86 ftp = null; 87 88 # region 89/***** 90 * FtpWebResponse 91 *****/92 // FtpWebResponse ftpWebResponse = (FtpWebResponse) ftp. getResponse (); 93 # endregion 94} 95 96 private static FtpWebRequest GetRequest (string URI, string username, string password) 97 {98 // create a Class Object 99 FtpWebRequest result = (FtpWebRequest) FtpWebRequest Based on the server information. create (URI); 100 // provide the authentication information 101 result. credentials = new System. net. networkCredential (username, password); 102 // sets whether to maintain the control connection to the FTP server after the request is complete. The default value is true103 result. keepAlive = false; 104 return result; 105}