c#下winform的ftp上传

    /*
    FTPFactory.cs
    Better view with tab space=4
    Written by Jaimon Mathew (jaimonmathew@rediffmail.com)
    Rolander,Dan (Dan.Rolander@marriott.com) has modified the 
    download
    method to cope with file name with path information. He also 
    provided
    the XML comments so that the library provides Intellisense 
    descriptions.
    use the following line to compile
    csc /target:library /out:FTPLib.dll /r:System.DLL FTPFactory.cs
    */
    using System;
    using System.Net;
    using System.IO;
    using System.Text;
    using System.Net.Sockets;
    namespace WindowsApplication1
    ...{
        public class FTPFactory
        ...{
            private string 
                remoteHost,remotePath,remoteUser,remotePass,mes;
            private int remotePort,bytes;
            private Socket clientSocket;
            private int retValue;
            private Boolean debug;
            private Boolean logined;
            private string reply;
            private static int BLOCK_SIZE = 512;
            Byte[] buffer = new Byte[BLOCK_SIZE];
            Encoding ASCII = Encoding.ASCII;
            public FTPFactory()
            ...{
                remoteHost  = "localhost";
                remotePath  = ".";
                remoteUser  = "anonymous";
                remotePass  = "jaimon@school2000.co.uk";
                remotePort  = 21;
                debug     = false;
                logined    = false;
            }
            /**////
            /// Set the name of the FTP server to connect to.
            ///
            /// Server name
            public void setRemoteHost(string remoteHost)
            ...{
                this.remoteHost = remoteHost;
            }
            /**////
            /// Return the name of the current FTP server.
            ///
            /// Server name
            public string getRemoteHost()
            ...{
                return remoteHost;
            }
            /**////
            /// Set the port number to use for FTP.
            ///
            /// Port number
            public void setRemotePort(int remotePort)
            ...{
                this.remotePort = remotePort;
            }
            /**////
            /// Return the current port number.
            ///
            /// Current port number
            public int getRemotePort()
            ...{
                return remotePort;
            }
            /**////
            /// Set the remote directory path.
            ///
            /// The remote directory path
            public void setRemotePath(string remotePath)
            ...{
                this.remotePath = remotePath;
            }
            /**////
            /// Return the current remote directory path.
            ///
            /// The current remote directory path.
            public string getRemotePath()
            ...{
                return remotePath;
            }
            /**////
            /// Set the user name to use for logging into the remote server.
                ///
                /// Username
                public void setRemoteUser(string remoteUser)
                ...{
                    this.remoteUser = remoteUser;
                }
            /**////
            /// Set the password to user for logging into the remote server.
                ///
                /// Password
                public void setRemotePass(string remotePass)
                ...{
                    this.remotePass = remotePass;
                }
            /**////
            /// Return a string array containing the remote directory's  file list.
                ///
                ///
                ///
                public string[] getFileList(string mask)
                ...{
                    if(!logined)
                    ...{
                        login();
                    }
                    Socket cSocket = createDataSocket();
                    sendCommand("NLST " + mask);
                    if(!(retValue == 150 || retValue == 125))
                    ...{
                        throw new IOException(reply.Substring(4));
                    }
                    mes = "";
                    while(true)
                    ...{
                        int bytes = cSocket.Receive(buffer, buffer.Length, 0);
                        mes += ASCII.GetString(buffer, 0, bytes);
                        if(bytes < buffer.Length)
                        ...{
                            break;
                        }
                    }
                    char[] seperator = ...{' '};
                    string[] mess = mes.Split(seperator);
                    cSocket.Close();
                    readReply();
                    if(retValue != 226)
                    ...{
                        throw new IOException(reply.Substring(4));
                    }
                    return mess;
                }
            /**////
            /// Return the size of a file.
            ///
            ///
            ///
            public long getFileSize(string fileName)
            ...{
                if(!logined)
                ...{
                    login();
                }
                sendCommand("SIZE " + fileName);
                long size=0;
                if(retValue == 213)
                ...{
                    size = Int64.Parse(reply.Substring(4));
                }
                else
                ...{
                    throw new IOException(reply.Substring(4));
                }
                return size;
            }
            /**////
            /// Login to the remote server.
            ///
            public void login()
            ...{
                clientSocket = new 
                    Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
                IPEndPoint ep = new 
                    IPEndPoint(Dns.Resolve(remoteHost).AddressList[0], remotePort);
                try
                ...{
                    clientSocket.Connect(ep);
                }
                catch(Exception)
                ...{
                    throw new IOException("Couldn't connect to remote server");
                              }
                readReply();
                if(retValue != 220)
                ...{
                    close();
                    throw new IOException(reply.Substring(4));
                }
                if(debug)
                    Console.WriteLine("USER "+remoteUser);
                sendCommand("USER "+remoteUser);
                if( !(retValue == 331 || retValue == 230) )
                ...{
                    cleanup();
                    throw new IOException(reply.Substring(4));
                }
                if( retValue != 230 )
                ...{
                    if(debug)
                        Console.WriteLine("PASS xxx");
                    sendCommand("PASS "+remotePass);
                    if( !(retValue == 230 || retValue == 202) )
                    ...{
                        cleanup();
                        throw new IOException(reply.Substring(4));
                    }
                }
                logined = true;
                Console.WriteLine("Connected to "+remoteHost);
                chdir(remotePath);
            }
            /**////
            /// If the value of mode is true, set binary mode for downloads.
                /// Else, set Ascii mode.
                ///
                ///
                public void setBinaryMode(Boolean mode)
                ...{
                    if(mode)
                    ...{
                        sendCommand("TYPE I");
                    }
                    else
                    ...{
                        sendCommand("TYPE A");
                    }
                    if (retValue != 200)
                    ...{
                        throw new IOException(reply.Substring(4));
                    }
                }
            /**////
            /// Download a file to the Assembly's local directory,
            /// keeping the same file name.
            ///
            ///
            public void download(string remFileName)
            ...{
                download(remFileName,"",false);
            }
            /**////
            /// Download a remote file to the Assembly's local directory,
            /// keeping the same file name, and set the resume flag.
            ///
            ///
            ///
            public void download(string remFileName,Boolean resume)
            ...{
                download(remFileName,"",resume);
            }
            /**////
            /// Download a remote file to a local file name which can include
                /// a path. The local file name will be created or overwritten,
                /// but the path must exist.
                ///
                ///
                ///
                public void download(string remFileName,string locFileName)
                ...{
                    download(remFileName,locFileName,false);
                } 
            /**////
            /// Download a remote file to a local file name which can  include
            /// a path, and set the resume flag. The local file name will be
            /// created or overwritten, but the path must exist.
            ///
            ///
            ///
            ///
                public void download(string remFileName,string 
                    locFileName,Boolean resume)
                ...{
                    if(!logined)
                    ...{
                        login();
                    }
                    setBinaryMode(true);
                    Console.WriteLine("Downloading file "+remFileName+" from "+remoteHost + "/"+remotePath);
                            if (locFileName.Equals(""))
                            ...{
                                locFileName = remFileName;
                            }
                    if(!File.Exists(locFileName))
                    ...{
                        Stream st = File.Create(locFileName);
                        st.Close();
                    }
                    FileStream output = new 
                        FileStream(locFileName,FileMode.Open);
                    Socket cSocket = createDataSocket();
                    long offset = 0;
                    if(resume)
                    ...{
                        offset = output.Length;
                        if(offset > 0 )
                        ...{
                            sendCommand("REST "+offset);
                            if(retValue != 350)
                            ...{
                                //throw new IOException(reply.Substring(4));
                                //Some servers may not support resuming.
                                offset = 0;
                            }
                        }
                        if(offset > 0)
                        ...{
                            if(debug)
                            ...{
                                Console.WriteLine("seeking to " + offset);
                            }
                            long npos = output.Seek(offset,SeekOrigin.Begin);
                            Console.WriteLine("new pos="+npos);
                        }
                    }
                    sendCommand("RETR " + remFileName);
                    if(!(retValue == 150 || retValue == 125))
                    ...{
                        throw new IOException(reply.Substring(4));
                    }
                    while(true)
                    ...{
                        bytes = cSocket.Receive(buffer, buffer.Length, 0);
                        output.Write(buffer,0,bytes);
                        if(bytes <= 0)
                        ...{
                            break;
                        }
                    }
                    output.Close();
                    if (cSocket.Connected)
                    ...{
                        cSocket.Close();
                    }
                    Console.WriteLine("");
                    readReply();
                    if( !(retValue == 226 || retValue == 250) )
                    ...{
                        throw new IOException(reply.Substring(4));
                    }
                }
            /**////
            /// Upload a file.
            ///
            ///
            public void upload(string fileName)
            ...{
                upload(fileName,false);
            }
            /**////
            /// Upload a file and set the resume flag.
            ///
            ///
            ///
            public void upload(string fileName,Boolean resume)
            ...{
                if(!logined)
                ...{
                    login();
                }
                Socket cSocket = createDataSocket();
                long offset=0;
                if(resume)
                ...{
                    try
                    ...{
                        setBinaryMode(true);
                        offset = getFileSize(fileName);
                    }
                    catch(Exception)
                    ...{
                        offset = 0;
                    }
                }
                if(offset > 0 )
                ...{
                    sendCommand("REST " + offset);
                    if(retValue != 350)
                    ...{
                        //throw new IOException(reply.Substring(4));
                        //Remote server may not support resuming.
                        offset = 0;
                    }
                }
                sendCommand("STOR "+Path.GetFileName(fileName));
                if( !(retValue == 125 || retValue == 150) )
                ...{
                    throw new IOException(reply.Substring(4));
                }
                // open input stream to read source file
                FileStream input = new 
                    FileStream(fileName,FileMode.Open);
                if(offset != 0)
                ...{
                    if(debug)
                    ...{
                        Console.WriteLine("seeking to " + offset);
                    }
                    input.Seek(offset,SeekOrigin.Begin);
                }
                Console.WriteLine("Uploading file "+fileName+" to "+remotePath);
                    while ((bytes = input.Read(buffer,0,buffer.Length)) > 0)
                    ...{
                        cSocket.Send(buffer, bytes, 0);
                    }
                input.Close();
                Console.WriteLine("");
                if (cSocket.Connected)
                ...{
                    cSocket.Close();
                }
                readReply();
                if( !(retValue == 226 || retValue == 250) )
                ...{
                    throw new IOException(reply.Substring(4));
                }
            }
            /**////
            /// Delete a file from the remote FTP server.
            ///
            ///
            public void deleteRemoteFile(string fileName)
            ...{
                if(!logined)
                ...{
                    login();
                }
                sendCommand("DELE "+fileName);
                if(retValue != 250)
                ...{
                    throw new IOException(reply.Substring(4));
                }
            }
            /**////
            /// Rename a file on the remote FTP server.
            ///
            ///
            ///
            public void renameRemoteFile(string oldFileName,string 
                newFileName)
            ...{
                if(!logined)
                ...{
                    login();
                }
                sendCommand("RNFR "+oldFileName);
                if(retValue != 350)
                ...{
                    throw new IOException(reply.Substring(4));
                }
                //  known problem
                //  rnto will not take care of existing file.
                //  i.e. It will overwrite if newFileName exist
                sendCommand("RNTO "+newFileName);
                if(retValue != 250)
                ...{
                    throw new IOException(reply.Substring(4));
                }
            }
            /**////
            /// Create a directory on the remote FTP server.
            ///
            ///
            public void mkdir(string dirName)
            ...{
                if(!logined)
                ...{
                    login();
                }
                sendCommand("MKD "+dirName);
                if(retValue != 250)
                ...{
                    throw new IOException(reply.Substring(4));
                }
            }
            /**////
            /// Delete a directory on the remote FTP server.
            ///
            ///
            public void rmdir(string dirName)
            ...{
                if(!logined)
                ...{
                    login();
                }
                sendCommand("RMD "+dirName);
                if(retValue != 250)
                ...{
                    throw new IOException(reply.Substring(4));
                }
            }
            /**////
            /// Change the current working directory on the remote FTP server.
                ///
                ///
                public void chdir(string dirName)
                ...{
                    if(dirName.Equals("."))
                    ...{
                        return;
                    }
                    if(!logined)
                    ...{
                        login();
                    }
                    sendCommand("CWD "+dirName);
                    if(retValue != 250)
                    ...{
                        throw new IOException(reply.Substring(4));
                    }
                    this.remotePath = dirName;
                    Console.WriteLine("Current directory is "+remotePath);
                }
            /**////
            /// Close the FTP connection.
            ///
            public void close()
            ...{
                if( clientSocket != null )
                ...{
                    sendCommand("QUIT");
                }
                cleanup();
                Console.WriteLine("Closing...");
            }
            /**////
            /// Set debug mode.
            ///
            ///
            public void setDebug(Boolean debug)
            ...{
                this.debug = debug;
            }
            private void readReply()
            ...{
                mes = "";
                reply = readLine();
                retValue = Int32.Parse(reply.Substring(0,3));
            }
            private void cleanup()
            ...{
                if(clientSocket!=null)
                ...{
                    clientSocket.Close();
                    clientSocket = null;
                }
                logined = false;
            }
            private string readLine()
            ...{
                while(true)
                ...{
                    bytes = clientSocket.Receive(buffer, buffer.Length, 0);
                    mes += ASCII.GetString(buffer, 0, bytes);
                    if(bytes < buffer.Length)
                    ...{
                        break;
                    }
                }
                char[] seperator = ...{' '};
                string[] mess = mes.Split(seperator);
                if(mes.Length > 2)
                ...{
                    mes = mess[mess.Length-2];
                }
                else
                ...{
                    mes = mess[0];
                }
                if(!mes.Substring(3,1).Equals(" "))
                ...{
                    return readLine();
                }
                if(debug)
                ...{
                    for(int k=0;k < mess.Length-1;k++)
                    ...{
                        Console.WriteLine(mess[k]);
                    }
                }
                return mes;
            }
            private void sendCommand(String command)
            ...{
                Byte[] cmdBytes = 
                    Encoding.ASCII.GetBytes((command+" ").ToCharArray());
                clientSocket.Send(cmdBytes, cmdBytes.Length, 0);
                readReply();
            }
            private Socket createDataSocket()
            ...{
                sendCommand("PASV");
                if(retValue != 227)
                ...{
                    throw new IOException(reply.Substring(4));
                }
                int index1 = reply.IndexOf('(');
                int index2 = reply.IndexOf(')');
                string ipData = 
                    reply.Substring(index1+1,index2-index1-1);
                int[] parts = new int[6];
                int len = ipData.Length;
                int partCount = 0;
                string buf="";
                for (int i = 0; i < len && partCount <= 6; i++)
                ...{
                    char ch = Char.Parse(ipData.Substring(i,1));
                    if (Char.IsDigit(ch))
                        buf+=ch;
                    else if (ch != ',')
                    ...{
                        throw new IOException("Malformed PASV reply: " + 
                            reply);
                    }
                    if (ch == ',' || i+1 == len)
                    ...{
                        try
                        ...{
                            parts[partCount++] = Int32.Parse(buf);
                            buf="";
                        }
                        catch (Exception)
                        ...{
                            throw new IOException("Malformed PASV reply: " + 
                                reply);
                        }
                    }
                }
                string ipAddress = parts[0] + "."+ parts[1]+ "." +
                    parts[2] + "." + parts[3];
                int port = (parts[4] << 8) + parts[5];
                Socket s = new 
                    Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
                IPEndPoint ep = new 
                    IPEndPoint(Dns.Resolve(ipAddress).AddressList[0], port);
                try
                ...{
                    s.Connect(ep);
                }
                catch(Exception)
                ...{
                    throw new IOException("Can't connect to remote server");
                              }
                return s;
            }
        }
    }

    /*
    FTPFactory.cs
    Better view with tab space=4
    Written by Jaimon Mathew (jaimonmathew@rediffmail.com)
    Rolander,Dan (Dan.Rolander@marriott.com) has modified the 
    download
    method to cope with file name with path information. He also 
    provided
    the XML comments so that the library provides Intellisense 
    descriptions.
    use the following line to compile
    csc /target:library /out:FTPLib.dll /r:System.DLL FTPFactory.cs
    */
    using System;
    using System.Net;
    using System.IO;
    using System.Text;
    using System.Net.Sockets;
    namespace WindowsApplication1
    ...{
        public class FTPFactory
        ...{
            private string 
                remoteHost,remotePath,remoteUser,remotePass,mes;
            private int remotePort,bytes;
            private Socket clientSocket;
            private int retValue;
            private Boolean debug;
            private Boolean logined;
            private string reply;
            private static int BLOCK_SIZE = 512;
            Byte[] buffer = new Byte[BLOCK_SIZE];
            Encoding ASCII = Encoding.ASCII;
            public FTPFactory()
            ...{
                remoteHost  = "localhost";
                remotePath  = ".";
                remoteUser  = "anonymous";
                remotePass  = "jaimon@school2000.co.uk";
                remotePort  = 21;
                debug     = false;
                logined    = false;
            }
            /**////
            /// Set the name of the FTP server to connect to.
            ///
            /// Server name
            public void setRemoteHost(string remoteHost)
            ...{
                this.remoteHost = remoteHost;
            }
            /**////
            /// Return the name of the current FTP server.
            ///
            /// Server name
            public string getRemoteHost()
            ...{
                return remoteHost;
            }
            /**////
            /// Set the port number to use for FTP.
            ///
            /// Port number
            public void setRemotePort(int remotePort)
            ...{
                this.remotePort = remotePort;
            }
            /**////
            /// Return the current port number.
            ///
            /// Current port number
            public int getRemotePort()
            ...{
                return remotePort;
            }
            /**////
            /// Set the remote directory path.
            ///
            /// The remote directory path
            public void setRemotePath(string remotePath)
            ...{
                this.remotePath = remotePath;
            }
            /**////
            /// Return the current remote directory path.
            ///
            /// The current remote directory path.
            public string getRemotePath()
            ...{
                return remotePath;
            }
            /**////
            /// Set the user name to use for logging into the remote server.
                ///
                /// Username
                public void setRemoteUser(string remoteUser)
                ...{
                    this.remoteUser = remoteUser;
                }
            /**////
            /// Set the password to user for logging into the remote server.
                ///
                /// Password
                public void setRemotePass(string remotePass)
                ...{
                    this.remotePass = remotePass;
                }
            /**////
            /// Return a string array containing the remote directory's  file list.
                ///
                ///
                ///
                public string[] getFileList(string mask)
                ...{
                    if(!logined)
                    ...{
                        login();
                    }
                    Socket cSocket = createDataSocket();
                    sendCommand("NLST " + mask);
                    if(!(retValue == 150 || retValue == 125))
                    ...{
                        throw new IOException(reply.Substring(4));
                    }
                    mes = "";
                    while(true)
                    ...{
                        int bytes = cSocket.Receive(buffer, buffer.Length, 0);
                        mes += ASCII.GetString(buffer, 0, bytes);
                        if(bytes < buffer.Length)
                        ...{
                            break;
                        }
                    }
                    char[] seperator = ...{' '};
                    string[] mess = mes.Split(seperator);
                    cSocket.Close();
                    readReply();
                    if(retValue != 226)
                    ...{
                        throw new IOException(reply.Substring(4));
                    }
                    return mess;
                }
            /**////
            /// Return the size of a file.
            ///
            ///
            ///
            public long getFileSize(string fileName)
            ...{
                if(!logined)
                ...{
                    login();
                }
                sendCommand("SIZE " + fileName);
                long size=0;
                if(retValue == 213)
                ...{
                    size = Int64.Parse(reply.Substring(4));
                }
                else
                ...{
                    throw new IOException(reply.Substring(4));
                }
                return size;
            }
            /**////
            /// Login to the remote server.
            ///
            public void login()
            ...{
                clientSocket = new 
                    Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
                IPEndPoint ep = new 
                    IPEndPoint(Dns.Resolve(remoteHost).AddressList[0], remotePort);
                try
                ...{
                    clientSocket.Connect(ep);
                }
                catch(Exception)
                ...{
                    throw new IOException("Couldn't connect to remote server");
                              }
                readReply();
                if(retValue != 220)
                ...{
                    close();
                    throw new IOException(reply.Substring(4));
                }
                if(debug)
                    Console.WriteLine("USER "+remoteUser);
                sendCommand("USER "+remoteUser);
                if( !(retValue == 331 || retValue == 230) )
                ...{
                    cleanup();
                    throw new IOException(reply.Substring(4));
                }
                if( retValue != 230 )
                ...{
                    if(debug)
                        Console.WriteLine("PASS xxx");
                    sendCommand("PASS "+remotePass);
                    if( !(retValue == 230 || retValue == 202) )
                    ...{
                        cleanup();
                        throw new IOException(reply.Substring(4));
                    }
                }
                logined = true;
                Console.WriteLine("Connected to "+remoteHost);
                chdir(remotePath);
            }
            /**////
            /// If the value of mode is true, set binary mode for downloads.
                /// Else, set Ascii mode.
                ///
                ///
                public void setBinaryMode(Boolean mode)
                ...{
                    if(mode)
                    ...{
                        sendCommand("TYPE I");
                    }
                    else
                    ...{
                        sendCommand("TYPE A");
                    }
                    if (retValue != 200)
                    ...{
                        throw new IOException(reply.Substring(4));
                    }
                }
            /**////
            /// Download a file to the Assembly's local directory,
            /// keeping the same file name.
            ///
            ///
            public void download(string remFileName)
            ...{
                download(remFileName,"",false);
            }
            /**////
            /// Download a remote file to the Assembly's local directory,
            /// keeping the same file name, and set the resume flag.
            ///
            ///
            ///
            public void download(string remFileName,Boolean resume)
            ...{
                download(remFileName,"",resume);
            }
            /**////
            /// Download a remote file to a local file name which can include
                /// a path. The local file name will be created or overwritten,
                /// but the path must exist.
                ///
                ///
                ///
                public void download(string remFileName,string locFileName)
                ...{
                    download(remFileName,locFileName,false);
                } 
            /**////
            /// Download a remote file to a local file name which can  include
            /// a path, and set the resume flag. The local file name will be
            /// created or overwritten, but the path must exist.
            ///
            ///
            ///
            ///
                public void download(string remFileName,string 
                    locFileName,Boolean resume)
                ...{
                    if(!logined)
                    ...{
                        login();
                    }
                    setBinaryMode(true);
                    Console.WriteLine("Downloading file "+remFileName+" from "+remoteHost + "/"+remotePath);
                            if (locFileName.Equals(""))
                            ...{
                                locFileName = remFileName;
                            }
                    if(!File.Exists(locFileName))
                    ...{
                        Stream st = File.Create(locFileName);
                        st.Close();
                    }
                    FileStream output = new 
                        FileStream(locFileName,FileMode.Open);
                    Socket cSocket = createDataSocket();
                    long offset = 0;
                    if(resume)
                    ...{
                        offset = output.Length;
                        if(offset > 0 )
                        ...{
                            sendCommand("REST "+offset);
                            if(retValue != 350)
                            ...{
                                //throw new IOException(reply.Substring(4));
                                //Some servers may not support resuming.
                                offset = 0;
                            }
                        }
                        if(offset > 0)
                        ...{
                            if(debug)
                            ...{
                                Console.WriteLine("seeking to " + offset);
                            }
                            long npos = output.Seek(offset,SeekOrigin.Begin);
                            Console.WriteLine("new pos="+npos);
                        }
                    }
                    sendCommand("RETR " + remFileName);
                    if(!(retValue == 150 || retValue == 125))
                    ...{
                        throw new IOException(reply.Substring(4));
                    }
                    while(true)
                    ...{
                        bytes = cSocket.Receive(buffer, buffer.Length, 0);
                        output.Write(buffer,0,bytes);
                        if(bytes <= 0)
                        ...{
                            break;
                        }
                    }
                    output.Close();
                    if (cSocket.Connected)
                    ...{
                        cSocket.Close();
                    }
                    Console.WriteLine("");
                    readReply();
                    if( !(retValue == 226 || retValue == 250) )
                    ...{
                        throw new IOException(reply.Substring(4));
                    }
                }
            /**////
            /// Upload a file.
            ///
            ///
            public void upload(string fileName)
            ...{
                upload(fileName,false);
            }
            /**////
            /// Upload a file and set the resume flag.
            ///
            ///
            ///
            public void upload(string fileName,Boolean resume)
            ...{
                if(!logined)
                ...{
                    login();
                }
                Socket cSocket = createDataSocket();
                long offset=0;
                if(resume)
                ...{
                    try
                    ...{
                        setBinaryMode(true);
                        offset = getFileSize(fileName);
                    }
                    catch(Exception)
                    ...{
                        offset = 0;
                    }
                }
                if(offset > 0 )
                ...{
                    sendCommand("REST " + offset);
                    if(retValue != 350)
                    ...{
                        //throw new IOException(reply.Substring(4));
                        //Remote server may not support resuming.
                        offset = 0;
                    }
                }
                sendCommand("STOR "+Path.GetFileName(fileName));
                if( !(retValue == 125 || retValue == 150) )
                ...{
                    throw new IOException(reply.Substring(4));
                }
                // open input stream to read source file
                FileStream input = new 
                    FileStream(fileName,FileMode.Open);
                if(offset != 0)
                ...{
                    if(debug)
                    ...{
                        Console.WriteLine("seeking to " + offset);
                    }
                    input.Seek(offset,SeekOrigin.Begin);
                }
                Console.WriteLine("Uploading file "+fileName+" to "+remotePath);
                    while ((bytes = input.Read(buffer,0,buffer.Length)) > 0)
                    ...{
                        cSocket.Send(buffer, bytes, 0);
                    }
                input.Close();
                Console.WriteLine("");
                if (cSocket.Connected)
                ...{
                    cSocket.Close();
                }
                readReply();
                if( !(retValue == 226 || retValue == 250) )
                ...{
                    throw new IOException(reply.Substring(4));
                }
            }
            /**////
            /// Delete a file from the remote FTP server.
            ///
            ///
            public void deleteRemoteFile(string fileName)
            ...{
                if(!logined)
                ...{
                    login();
                }
                sendCommand("DELE "+fileName);
                if(retValue != 250)
                ...{
                    throw new IOException(reply.Substring(4));
                }
            }
            /**////
            /// Rename a file on the remote FTP server.
            ///
            ///
            ///
            public void renameRemoteFile(string oldFileName,string 
                newFileName)
            ...{
                if(!logined)
                ...{
                    login();
                }
                sendCommand("RNFR "+oldFileName);
                if(retValue != 350)
                ...{
                    throw new IOException(reply.Substring(4));
                }
                //  known problem
                //  rnto will not take care of existing file.
                //  i.e. It will overwrite if newFileName exist
                sendCommand("RNTO "+newFileName);
                if(retValue != 250)
                ...{
                    throw new IOException(reply.Substring(4));
                }
            }
            /**////
            /// Create a directory on the remote FTP server.
            ///
            ///
            public void mkdir(string dirName)
            ...{
                if(!logined)
                ...{
                    login();
                }
                sendCommand("MKD "+dirName);
                if(retValue != 250)
                ...{
                    throw new IOException(reply.Substring(4));
                }
            }
            /**////
            /// Delete a directory on the remote FTP server.
            ///
            ///
            public void rmdir(string dirName)
            ...{
                if(!logined)
                ...{
                    login();
                }
                sendCommand("RMD "+dirName);
                if(retValue != 250)
                ...{
                    throw new IOException(reply.Substring(4));
                }
            }
            /**////
            /// Change the current working directory on the remote FTP server.
                ///
                ///
                public void chdir(string dirName)
                ...{
                    if(dirName.Equals("."))
                    ...{
                        return;
                    }
                    if(!logined)
                    ...{
                        login();
                    }
                    sendCommand("CWD "+dirName);
                    if(retValue != 250)
                    ...{
                        throw new IOException(reply.Substring(4));
                    }
                    this.remotePath = dirName;
                    Console.WriteLine("Current directory is "+remotePath);
                }
            /**////
            /// Close the FTP connection.
            ///
            public void close()
            ...{
                if( clientSocket != null )
                ...{
                    sendCommand("QUIT");
                }
                cleanup();
                Console.WriteLine("Closing...");
            }
            /**////
            /// Set debug mode.
            ///
            ///
            public void setDebug(Boolean debug)
            ...{
                this.debug = debug;
            }
            private void readReply()
            ...{
                mes = "";
                reply = readLine();
                retValue = Int32.Parse(reply.Substring(0,3));
            }
            private void cleanup()
            ...{
                if(clientSocket!=null)
                ...{
                    clientSocket.Close();
                    clientSocket = null;
                }
                logined = false;
            }
            private string readLine()
            ...{
                while(true)
                ...{
                    bytes = clientSocket.Receive(buffer, buffer.Length, 0);
                    mes += ASCII.GetString(buffer, 0, bytes);
                    if(bytes < buffer.Length)
                    ...{
                        break;
                    }
                }
                char[] seperator = ...{' '};
                string[] mess = mes.Split(seperator);
                if(mes.Length > 2)
                ...{
                    mes = mess[mess.Length-2];
                }
                else
                ...{
                    mes = mess[0];
                }
                if(!mes.Substring(3,1).Equals(""))
                ...{
                    return readLine();
                }
                if(debug)
                ...{
                    for(int k=0;k < mess.Length-1;k++)
                    ...{
                        Console.WriteLine(mess[k]);
                    }
                }
                return mes;
            }
            private void sendCommand(String command)
            ...{
                Byte[] cmdBytes = 
                    Encoding.ASCII.GetBytes((command+"").ToCharArray());
                clientSocket.Send(cmdBytes, cmdBytes.Length, 0);
                readReply();
            }
            private Socket createDataSocket()
            ...{
                sendCommand("PASV");
                if(retValue != 227)
                ...{
                    throw new IOException(reply.Substring(4));
                }
                int index1 = reply.IndexOf('(');
                int index2 = reply.IndexOf(')');
                string ipData = 
                    reply.Substring(index1+1,index2-index1-1);
                int[] parts = new int[6];
                int len = ipData.Length;
                int partCount = 0;
                string buf="";
                for (int i = 0; i < len && partCount <= 6; i++)
                ...{
                    char ch = Char.Parse(ipData.Substring(i,1));
                    if (Char.IsDigit(ch))
                        buf+=ch;
                    else if (ch != ',')
                    ...{
                        throw new IOException("Malformed PASV reply: " + 
                            reply);
                    }
                    if (ch == ',' || i+1 == len)
                    ...{
                        try
                        ...{
                            parts[partCount++] = Int32.Parse(buf);
                            buf="";
                        }
                        catch (Exception)
                        ...{
                            throw new IOException("Malformed PASV reply: " + 
                                reply);
                        }
                    }
                }
                string ipAddress = parts[0] + "."+ parts[1]+ "." +
                    parts[2] + "." + parts[3];
                int port = (parts[4] << 8) + parts[5];
                Socket s = new 
                    Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
                IPEndPoint ep = new 
                    IPEndPoint(Dns.Resolve(ipAddress).AddressList[0], port);
                try
                ...{
                    s.Connect(ep);
                }
                catch(Exception)
                ...{
                    throw new IOException("Can't connect to remote server");
                              }
                return s;
            }
       

以上是在C#项目下添加ftp类

配置ftp 服务器 (xp下局域网内)

1.server下，打开设置-->控制面板-->管理工具-->IIS,找到本地计算机下的ftp站点，打开默认ftp站点的属性，做如下配置：
1）ftp站点选项卡
IP地址：指定一IP地址，如：192.168.0.101
端口号：21
2）主目录选项卡
选择内容来源为：此计算机上的目录
ftp站点目录：配置一本机目录，最好为非系统盘，如D:/ftp。选择读取、写入、记录访问

2.server下，网络邻居里的本地连接，属性-->常规-->TCP/IP协议-->属性，取消自动获取IP地址，手动输入如上IP：192.168.0.101

3.client下，网络邻居里的本地连接，属性-->常规-->TCP/IP协议-->属性，取消自动获取IP地址，手动输入IP：192.168.0.102

4:测试：把文件copy到ftp主目录下，即D:/ftp，通过在server端以及client端的IE，输入ftp://192.168.0.101或者ftp://servername (作为服务器的计算机名，可在我的电脑-->属性-->计算机名里获得)可访问到文件，则测试成功。

在主函数中创建实例

查看代码

    FTPFactory ff = new FTPFactory();
    ff.setDebug(true);
    ff.setRemoteHost("192.168.0.101");
    ff.setRemoteUser("Anonymous");
    ff.setRemotePass("");
    ff.login();
    ff.chdir(".");
    string[] fileNames = ff.getFileList("*.*");
    for(int i=0;i < fileNames.Length;i++) 
    ...{
        Console.WriteLine(fileNames[i]);
    }
    ff.setBinaryMode(true);
    ff.upload("D:/项目资料/档案馆/简介/mps1.ppt");
    ff.close();

说明：
1.参数设置
1）RemoteHost=server的IP地址
2）RemoteUser=用户名，匿名情况下不能为" ",而应为"Anonymous"
3）此处的chdir或别处的remotePath，为设置或修改服务器的当前目录，若没有当前目录（只有根目录），应设置为"."。比较奇怪的是我试过“D:/ftp/”(服务器主目录以及其变形“/ftp”等)或者ftp://servername/(或者“//servername/”等)，都无法识别，盼高人指点

4) ftp应答码及其意义

110
重新启动标记应答。在这种情况下文本是确定的，它必须是：MARK yyyy=mmmm，其中yyyy是用户进程数据流标记，mmmm是服务器标记。
120
服务在nnn分钟内準备好
125
数据连接已打开，準备传送
150
文件状态良好，打开数据连接
200
命令成功
202
命令未实现
211
系统状态或系统帮助响应
212
目录状态
213
文件状态
214
帮助信息，信息仅对人类用户有用
215
名字系统类型
220
对新用户服务準备好
221
服务关闭控制连接，可以退出登录
225
数据连接打开，无传输正在进行
226
关闭数据连接，请求的文件操作成功
227
进入被动模式
230
用户登录
250
请求的文件操作完成
257
创建"PATHNAME"
331
用户名正确，需要口令
332
登录时需要帐户信息
350
请求的文件操作需要进一步命令
421
不能提供服务，关闭控制连接
425
不能打开数据连接
426
关闭连接，中止传输
450
请求的文件操作未执行
451
中止请求的操作：有本地错误
452
未执行请求的操作：系统存储空间不足
500
格式错误，命令不可识别
501
参数语法错误
502
命令未实现
503
命令顺序错误
504
此参数下的命令功能未实现
530
未登录
532
存储文件需要帐户信息
550
未执行请求的操作
551
请求操作中止：页类型未知
552
请求的文件操作中止，存储分配溢出
553
未执行请求的操作：文件名不合法