Ftphelper implementing FTP Server file read and write operations (C #)

Recently done a project, need to read the files on the FTP server, so refer to some of the online Help group method, the use of the process, there are some small details, so I made some changes, to share

 Using System; Using System.Collections.Generic; Using System.Linq; Using System.Text; Using System.Net; Using System.IO;  Using system.threading;using system.configuration; Namespace Ftpsyn {public class Ftphelper {//Basic settings Ftp://400:[email protected]/400backup STA Tic private string path = @ "ftp://" + configurationmanager.appsettings["Ftpserverip"].    ToString () + "/"; Destination path static private string Ftpip = configurationmanager.appsettings["Ftpserverip"].    ToString (); FTP IP address static private string username = configurationmanager.appsettings["FtpUserName"].   ToString (); FTP user name static private string password = configurationmanager.appsettings["FTPPassword"].   ToString (); FTP Password//Get FTP files and folders above public static string[] Getfilelist (string dir) {Strin             G[] Downloadfiles;             StringBuilder result = new StringBuilder ();             FtpWebRequest request;  try {               Request = (FtpWebRequest) ftpwebrequest.create (new Uri (path + dir)); Request.                 Usebinary = true; Request. Credentials = new NetworkCredential (username, password);//set user name and password request.                 Method = WebRequestMethods.Ftp.ListDirectory; Request.                 Usebinary = true; Request.  Usepassive = false;                 Choose active or passive mode, this sentence should be added. Request.                 KeepAlive = false;//Be sure to set this property, otherwise the exception occurs when multiple files are downloaded at once. WebResponse response = Request.                 GetResponse (); StreamReader reader = new StreamReader (response.                  GetResponseStream ()); String 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) {Loghelper.writeerrorlog ("Get FTP Files and folders above:" + ex.)                 Message);                 Downloadfiles = null;             return downloadfiles;  }}///<summary>///Get the files from the FTP server and convert all the contents to a string return///</summary>// <param name= "FileName" ></param>//<param name= "dir" ></param>//<returns&gt ;</returns> public static string Getfilestr (String fileName, string dir) {Ftpwebreques             T reqftp;                 try {reqftp = (ftpwebrequest) ftpwebrequest.create (The new Uri (path + dir + "/" + FileName));                 Reqftp.method = WebRequestMethods.Ftp.DownloadFile;                 Reqftp.usebinary = true;                 Reqftp.credentials = new NetworkCredential (username, password); reqftP.usepassive = false;                 Choose active or passive mode, this sentence should be added.                 Reqftp.keepalive = false;//Be sure to set this property, otherwise the exception occurs when multiple files are downloaded at once.                 FtpWebResponse response = (ftpwebresponse) reqftp.getresponse (); Stream FtpStream = Response.                 GetResponseStream ();                 StreamReader reader = new StreamReader (ftpstream); String filestr = reader.                 ReadToEnd (); Reader.                 Close ();                 Ftpstream.close (); Response.                 Close ();             return filestr; } catch (Exception ex) {Loghelper.writeerrorlog ("Get FTP file and read content failed:" + ex.                 Message);             return null; }}///<summary>//Get file Size///</summary>//<param name= "file Relative path under &GT;IP server </param>////<returns> file size </returns> public static int GetFileSize (Strin G file) {StringBuilder result = new StrinGbuilder ();             FtpWebRequest request;                 try {request = (FtpWebRequest) ftpwebrequest.create (new Uri (path + file)); Request.                 Usebinary = true; Request. Credentials = new NetworkCredential (username, password);//set user name and password request.                  Method = WebRequestMethods.Ftp.GetFileSize; int datalength = (int) request. GetResponse ().                  ContentLength;             return datalength; } catch (Exception ex) {Console.WriteLine ("Get File Size error:" + ex.)                 Message);             return-1; }}///<summary>//File upload///</summary>//<param name= "Filepat H "> Original path (absolute path) includes file name </param>//<param name=" Objpath "> Destination folder: Relative path under server is not filled with root directory </param> PU Blic static void FileUpLoad (String filepath,string objpath= "") {try {sTring url = path;                 if (objpath!= "") URL + = Objpath + "/";                     try {ftpwebrequest reqftp = null; File to be uploaded (full path) try {FileInfo FileInfo = new FileInfo (file                         Path); using (FileStream fs = Fileinfo.openread ()) {Long length = fs.                             Length;                              Reqftp = (ftpwebrequest) ftpwebrequest.create (new Uri (URL + fileinfo.name));                             Set the password for the account connected to ftp Reqftp.credentials = new NetworkCredential (username, password);                             Sets whether to maintain a connection after the request is complete reqftp.keepalive = false;                             Specifies the execution command reqftp.method = WebRequestMethods.Ftp.UploadFile; Specify the data Transfer type reqFtp.usebinary = true;                                 using (Stream stream = Reqftp.getrequeststream ()) {//Set buffer size                                 int bufferlength = 5120;                                 Byte[] B = new Byte[bufferlength];                                 int i; while ((i = FS). Read (b, 0, bufferlength)) > 0) {stream.                                 Write (b, 0, I);                             } Console.WriteLine ("Upload file succeeded");                         }}} catch (Exception ex) { Console.WriteLine ("Upload file failed error is" + ex.)                     Message); } finally {}} catch (Except                   Ion ex) {  Console.WriteLine ("Upload file failed error is" + ex.)                 Message);             } finally {}} catch (Exception ex) {Console.WriteLine ("Upload file failed error is" + ex.)             Message); }}///<summary>//delete files///</summary>//<param name=             Relative paths under "filename" > server include file name </param> public static void Deletefilename (string filename) {                 try {FileInfo fileinf = new FileInfo (Ftpip + "" + fileName);                 String uri = path + fileName;                 FtpWebRequest reqftp = (ftpwebrequest) ftpwebrequest.create (new Uri (URI));                 Specifies the data transfer type reqftp.usebinary = TRUE;                 FTP user name and password reqftp.credentials = new NetworkCredential (username, password); The default is true, the connection is not closed//executed after a command Reqftp.keePalive = false;                 Specifies what command to execute Reqftp.method = WebRequestMethods.Ftp.DeleteFile;                 FtpWebResponse response = (ftpwebresponse) reqftp.getresponse (); Response.             Close (); } catch (Exception ex) {Console.WriteLine ("Error Deleting file:" + ex.)             Message); }}///<summary>//New directory must first exist///</summary>//&LT;PA              Ram name= relative path under "DirName" > Server </param> public static void MakeDir (string dirName) {try                 {string uri = path + dirName;                 FtpWebRequest reqftp = (ftpwebrequest) ftpwebrequest.create (new Uri (URI));                 Specifies the data transfer type reqftp.usebinary = TRUE;                 FTP user name and password reqftp.credentials = new NetworkCredential (username, password);    Reqftp.method = WebRequestMethods.Ftp.MakeDirectory;             FtpWebResponse response = (ftpwebresponse) reqftp.getresponse (); Response.             Close (); } catch (Exception ex) {Console.WriteLine ("Error creating directory:" + ex.)             Message); }}///<summary>///delete directory must first exist///</summary>//&LT;PA             Ram name= relative path under "DirName" > Server </param> public static void Deldir (string dirName) {try                 {string uri = path + dirName;                 FtpWebRequest reqftp = (ftpwebrequest) ftpwebrequest.create (new Uri (URI));                 FTP user name and password reqftp.credentials = new NetworkCredential (username, password);                 Reqftp.method = WebRequestMethods.Ftp.RemoveDirectory;                 FtpWebResponse response = (ftpwebresponse) reqftp.getresponse (); Response.             Close ();          } catch (Exception ex) {       Console.WriteLine ("Error deleting directory:" + ex.)             Message); }}///<summary>///Get a list of folders from the FTP server///</summary>/<param NA Me= relative paths under "Requedstpath" > Servers </param>//<returns></returns> public static LIST&LT;STR             Ing> getdirctory (String requedstpath) {list<string> STRs = new list<string> ();   try {string uri = path + Requedstpath;                 The destination path is the server address ftpwebrequest reqftp = (ftpwebrequest) ftpwebrequest.create (new Uri (URI));                 FTP user name and password reqftp.credentials = new NetworkCredential (username, password);                 Reqftp.method = WebRequestMethods.Ftp.ListDirectoryDetails;                 WebResponse response = Reqftp.getresponse (); StreamReader reader = new StreamReader (response. GetResponseStream ());//Chinese file name string line = Reader. ReadLine ();                while (line! = null) {if (line. Contains ("<DIR>")) {string msg = line. Substring (line. LastIndexOf ("<DIR>") +5).                         Trim (); STRs.                     ADD (msg); } line = reader.                 ReadLine (); } reader.                 Close (); Response.                 Close ();             return STRs; } catch (Exception ex) {Console.WriteLine ("Get directory Error:" + ex.)             Message);         } return STRs; }///<summary>///Get a list of files from the FTP server///</summary>//<param name= "requeds Tpath "> Relative path under Server </param>//<returns></returns> public static list<string> Get             File (String requedstpath) {list<string> STRs = new list<string> ();              try {   String uri = path + Requedstpath;                 The destination path is the server address ftpwebrequest reqftp = (ftpwebrequest) ftpwebrequest.create (new Uri (URI));                 FTP user name and password reqftp.credentials = new NetworkCredential (username, password);                 Reqftp.method = WebRequestMethods.Ftp.ListDirectoryDetails;                 WebResponse response = Reqftp.getresponse (); StreamReader reader = new StreamReader (response. GetResponseStream ());//Chinese file name string line = Reader.                 ReadLine (); while (line! = null) {if (!line. Contains ("<DIR>")) {string msg = line. Substring (39).                         Trim (); STRs.                     ADD (msg); } line = reader.                 ReadLine (); } reader.                 Close (); Response.                 Close ();             return STRs;  } catch (Exception ex)           {Console.WriteLine ("Get File Error:" + ex.)             Message);         } return STRs; }          } }

　　

Ftphelper implementing FTP Server file read and write operations (C #)