FTP file operations upload text, download files, delete files, create directories

<summary>//FTP upload File///</summary>//<param name= "fileUpload" > Upload control </para m>//<param name= "Ftpserverip" > Upload file Server ip</param>//<param name= "Ftpuserid" > Server user name &L        t;/param>//<param name= "FTPPassword" > Server password </param>//<returns></returns>            public string Upload (FileUpload FileUpload, String Ftpserverip, String Ftpuserid, String FTPPassword) {            string filename = Fileupload.filename; String Sret = "Upload succeeded!"            ";            FileInfo Fileinf = new FileInfo (fileUpload.PostedFile.FileName);            String uri = "ftp://" + Ftpserverip + "/" + filename;            FtpWebRequest reqftp;            Creates a FtpWebRequest object based on a Uri reqftp = (ftpwebrequest) ftpwebrequest.create (new Uri (URI));            FTP user name and password reqftp.credentials = new NetworkCredential (Ftpuserid, FTPPassword); The default is true, the connection is not closed//in a lifeAfter the order is executed reqftp.keepalive = false;            Specifies what command to execute Reqftp.method = WebRequestMethods.Ftp.UploadFile;            Specifies the data transfer type reqftp.usebinary = TRUE;            Reqftp.usepassive = false;            Notifies server file size when uploading a file Reqftp.contentlength = Fileinf.length;            The buffer size is set to 2kb int bufflength = 2048;            byte[] buff = new Byte[bufflength];            int Contentlen;            Open a file stream (System.IO.FileStream) to read the uploaded file FileStream fs = Fileinf.openread ();                try {//writes the uploaded file to stream stream strm = Reqftp.getrequeststream (); 2KB contentlen per read file stream = fs.                Read (Buff, 0, bufflength);                    Stream content does not end while (Contentlen! = 0) {//writes content from file stream to upload stream Strm.                    Write (Buff, 0, Contentlen); Contentlen = fs.             Read (Buff, 0, bufflength);   }//Close two stream strm.                Close (); Fs.            Close (); } catch (Exception ex) {Sret = ex.            Message;        } return Sret; }

<summary>//FTP download File///</summary>//<param name= "userId" >ftp username </param&        Gt <param name= "pwd" >ftp password </param>//<param name= "ftppath" >ftp file path </param>//&L T;param name= "FilePath" > Download save path </param>//<param name= "filename" >ftp file name </param>//&L T;returns></returns> public string Download (string userId, string pwd, String Ftppath, string FilePath, S Tring fileName) {string sret = "Download successful!              ";            FtpWebRequest reqftp;                try {FileStream outputstream = new FileStream (FilePath + fileName, filemode.create); Creates a FtpWebRequest object based on a Uri reqftp = (ftpwebrequest) ftpwebrequest.create (new Uri (Ftppath + fileName)                );                Specifies what command to execute Reqftp.method = WebRequestMethods.Ftp.DownloadFile; Specify the data Transfer type Reqftp.useBinary = true;                Reqftp.usepassive = false;                                FTP user name and password reqftp.credentials = new NetworkCredential (userId, PWD);                FtpWebResponse response = (ftpwebresponse) reqftp.getresponse (); Write the downloaded file to stream ftpstream = response.                GetResponseStream (); Long cl = Response.                ContentLength;                The buffer size is set to 2kb int buffersize = 2048;                int readcount;                byte[] buffer = new Byte[buffersize];                2KB readcount per read file stream = ftpstream.read (buffer, 0, buffersize);  while (Readcount > 0) {//writes the content from the file stream to Outputstream.write (buffer,                    0, Readcount);                Readcount = ftpstream.read (buffer, 0, buffersize);                }//Close two streams and FTP connection ftpstream.close ();                Outputstream.close (); REsponse.            Close (); } catch (Exception ex) {Sret=ex.            Message;        }//returns the download result (whether the download was successful) return Sret; }

<summary>//FTP Delete files///</summary>//<param name= "ftppath" >ftp file path </para        m>//<param name= "userId" >ftp user name </param>///<param name= "pwd" >ftp password </param>  <param name= "filename" >ftp filename </param>///<returns></returns> public string DeleteFile (String ftppath,string userid,string pwd, String fileName) {string Sret = "Delete succeeded!               ";            FtpWebResponse respose = null;            FtpWebRequest reqftp = null;            Stream localfile = null;            Stream stream = null;  try {//Create FtpWebRequest object based on URI reqftp = (ftpwebrequest) ftpwebrequest.create (new Uri (String.                Format (@ "{0}{1}", Ftppath, FileName));                    Provide verification of account password reqftp.credentials = new NetworkCredential (userId, PWD); The default is true to not close the FTP connection after uploading reqftp.keepalive = FALse                Perform the delete operation Reqftp.method = WebRequestMethods.Ftp.DeleteFile;                  Respose = (ftpwebresponse) reqftp.getresponse (); } catch (Exception ex) {Sret = ex.            Message; } finally {//close connection with stream if (respose! = null) respose.c                Lose (); if (localfile! = null) LocalFile.                Close (); if (stream! = null) stream.            Close ();        }//Returns execution status return Sret; }

<summary>//FTP Create directory///</summary>//<param name= "dirName" > directory name &LT;/PARAM&G        T        <param name= "Ftpserverip" > Server address </param>//<param name= "Ftpuserid" >ftp user name </param> <param name= "FTPPassword" >ftp password </param>///<returns></returns> public Strin G Createdir (String dirName, String Ftpserverip, String Ftpuserid, String FTPPassword) {string Sret = "O            K ";                try {string uri = Ftpserverip + "/" + dirName;                FtpWebRequest reqftp;                Creates a FtpWebRequest object based on a Uri reqftp = (ftpwebrequest) ftpwebrequest.create (new Uri (URI));                FTP user name and password reqftp.credentials = new NetworkCredential (Ftpuserid, FTPPassword);                The default is true, the connection is not closed//After a command is executed reqftp.keepalive = false;         Specify what commands to execute         Reqftp.method = WebRequestMethods.Ftp.MakeDirectory;                Specifies the data transfer type reqftp.usebinary = TRUE;                FtpWebResponse respftp = (ftpwebresponse) reqftp.getresponse ();            Respftp.close (); } catch (Exception ex) {Sret = ex.            Message;        } return Sret; }

　　

FTP file operations upload text, download files, delete files, create directories