C # winfrom Analog FTP file Management implementation code

Using System; Using System.Collections.Generic; Using System.Text; Using System.Net; Using System.IO; Using System.Windows.Forms;        Namespace Convertdata{class Ftpupdown {string Ftpserverip;        String Ftpuserid;        String FTPPassword;        FtpWebRequest reqftp; private void Connect (String path)//Connect FTP {//Create FtpWebRequest object based on URI reqftp = (ftpwebrequest)            Ftpwebrequest.create (The new Uri (path));            Specifies the data transfer type reqftp.usebinary = TRUE;        FTP user name and password reqftp.credentials = new NetworkCredential (Ftpuserid, FTPPassword);  } public Ftpupdown (string Ftpserverip, String Ftpuserid, String ftppassword) {This.ftpserverip =            Ftpserverip;            This.ftpuserid = Ftpuserid;        This.ftppassword = FTPPassword;            }//Both call this private string[] getfilelist (string path, string wrmethods)//The above code example how to get the file list from the FTP server {  String[] Downloadfiles;          StringBuilder result = new StringBuilder ();                try {Connect (path);                Reqftp.method = Wrmethods;                WebResponse response = Reqftp.getresponse (); StreamReader reader = new StreamReader (response. GetResponseStream (), System.Text.Encoding.Default);//Chinese file name string line = Reader.                ReadLine (); while (line! = null) {result.                    Append (line); Result.                    Append ("\ n"); line = reader.                ReadLine (); }//To remove the trailing ' \ n ' result. Remove (result. ToString ().                LastIndexOf (' \ n '), 1); Reader.                Close (); Response.                Close (); return result. ToString ().            Split (' \ n '); } catch (Exception ex) {System.Windows.Forms.MessageBox.Show (ex.                Message);                Downloadfiles = null; return DOWNLOadfiles; }} public string[] Getfilelist (string path)//The above code example how to get the file list {return getfilelis from the FTP server        T ("ftp://" + Ftpserverip + "/" + path, WebRequestMethods.Ftp.ListDirectory); } public string[] Getfilelist ()//The above code example how to get the file list {return getfilelist ("ftp://" + ftpser) from the FTP server        Verip + "/", WebRequestMethods.Ftp.ListDirectory); The public void Upload (string filename)//code above implements the ability to upload files from an FTP server {FileInfo fileinf = new FileInfo (            filename);            String uri = "ftp://" + Ftpserverip + "/" + fileinf.name;            Connect (URI);//connect//default is True, the connection will not be closed//After a command is executed reqftp.keepalive = false;            Specifies what command to execute Reqftp.method = WebRequestMethods.Ftp.UploadFile;            Notifies server file size when uploading a file Reqftp.contentlength = Fileinf.length;            Buffer size set to KB 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 (); KB 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) {MessageBox.Show (ex.            Message, "Upload Error");        }} public bool Download (string FilePath, String fileName, out string errorinfo)////The above code implements the ability to download files from an FTP server {try {StringOnlyfilename = Path.getfilename (fileName);                String newfilename = FilePath + "\ \" + Onlyfilename; if (file.exists (NewFileName)) {errorinfo = string.                    Format ("Local file {0} already exists, could not be downloaded", newfilename);                return false;                } string url = "ftp://" + Ftpserverip + "/" + fileName;                Connect (URL);//Connect reqftp.credentials = new NetworkCredential (Ftpuserid, FTPPassword);                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);                FileStream outputstream = new FileStream (NewFileName, FileMode.Create);      while (Readcount > 0)          {outputstream.write (buffer, 0, readcount);                Readcount = ftpstream.read (buffer, 0, buffersize);                } ftpstream.close ();                Outputstream.close (); Response.                Close ();                ErrorInfo = "";            return true; } catch (Exception ex) {errorinfo = string. Format ("cannot download because {0}", ex.)                Message);            return false;                 }}//delete file public void Deletefilename (string fileName) {try {                 FileInfo Fileinf = new FileInfo (fileName);                 String uri = "ftp://" + Ftpserverip + "/" + fileinf.name; Connect (URI);//connect//default is True, the connection is not closed//executed after a command Reqftp.keepali                 ve = false;                 Specifies what command to execute Reqftp.method = WebRequestMethods.Ftp.DeleteFile; FtPwebresponse response = (ftpwebresponse) reqftp.getresponse (); Response.             Close (); } catch (Exception ex) {MessageBox.Show (ex.             Message, "delete error"); }}//create directory public void MakeDir (string dirName) {try {s                Tring uri = "ftp://" + Ftpserverip + "/" + dirName;                Connect (URI);//Connection Reqftp.method = WebRequestMethods.Ftp.MakeDirectory;                FtpWebResponse response = (ftpwebresponse) reqftp.getresponse (); Response.            Close (); } catch (Exception ex) {MessageBox.Show (ex.            Message); }}//delete directory public void Deldir (string dirName) {try {s                Tring uri = "ftp://" + Ftpserverip + "/" + dirName; Connect (URI);//Connection Reqftp.method = WebRequestMethods.Ftp.ReMoveDirectory;                FtpWebResponse response = (ftpwebresponse) reqftp.getresponse (); Response.            Close (); } catch (Exception ex) {MessageBox.Show (ex.            Message);            }}//Get file size public long getfilesize (string filename) {long fileSize = 0;                try {FileInfo fileinf = new FileInfo (filename);                String uri = "ftp://" + Ftpserverip + "/" + fileinf.name;                Connect (URI);//Connection Reqftp.method = WebRequestMethods.Ftp.GetFileSize;                FtpWebResponse response = (ftpwebresponse) reqftp.getresponse (); FileSize = Response.                ContentLength; Response.            Close (); } catch (Exception ex) {MessageBox.Show (ex.            Message);        } return fileSize; }//file renamed public void Rename (string currentfilename, STring NewFileName) {try {FileInfo fileinf = new FileInfo (currentfilename);                String uri = "ftp://" + Ftpserverip + "/" + fileinf.name;                Connect (URI);//Connection Reqftp.method = WebRequestMethods.Ftp.Rename;                Reqftp.renameto = NewFileName;                FtpWebResponse response = (ftpwebresponse) reqftp.getresponse (); Stream FtpStream = Response.                GetResponseStream ();                 Ftpstream.close (); Response.            Close (); } catch (Exception ex) {MessageBox.Show (ex.            Message); }}//Get file Clear public string[] Getfilesdetaillist () {return getfilelist ("ftp://" +        Ftpserverip + "/", WebRequestMethods.Ftp.ListDirectoryDetails); }//Get file Clear public string[] Getfilesdetaillist (string path) {return getfilelist ("ftp:/ /"+ Ftpserverip +"/" + path, WebRequestMethods.Ftp.ListDirectoryDetails); }    }}

Above is a class, for example to prove how to substitute

private void Button1_Click (object sender, EventArgs e)//File Upload {ftpupdown ftpupdown = new Ftpupdown ("192.            168.2.130:21 "," WL "," 123456 ");           Ftpupdown.upload ("E:\\other.rar"); } private void Button3_Click (object sender, EventArgs e)//modify {Ftpupdown Ftpupdown = new Ftpupdown ("192.            168.2.130:21 "," WL "," 123456 ");        Ftpupdown.rename ("Zhang San", "John Doe"); } private void Button4_Click (object sender, EventArgs e)//delete {Ftpupdown Ftpupdown = new Ftpupdown ("192.            168.2.130:21 "," WL "," 123456 ");        Ftpupdown.deldir ("Zhang San"); } private void Button2_Click (object sender, EventArgs e)//Add {ftpupdown Ftpupdown = new Ftpupdown ("192.            168.2.130:21 "," WL "," 123456 "); Ftpupdown.makedir (this. Txt_name.        Text);            }//Get FTP file Clear file, also for processing, be able to get all the file name Ftpupdown Ftpupdown = new Ftpupdown ("192.168.2.130", "WL", "123456");            string[] str = ftpupdown.getfilesdetaillist (); int i = 1; foreach (string item in str) {string[] name = Item.                Split ('); Txt_name. Text + = Name[name.                LENGTH-1] + ";";            i++; } Label1. Text = i.ToString ();