c# FTP操作类

http://www.cnblogs.com/swtseaman/archive/2011/03/29/1998611.html

C#语言: Codee#2416
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net;
using System.Windows.Forms;
using System.Globalization;

namespace FtpLib
{

    public class FtpWeb
    {
        string ftpServerIP;
        string ftpRemotePath;
        string ftpUserID;
        string ftpPassword;
        string ftpURI;

        /// <summary>
        /// 连接FTP
        /// </summary>
        /// <param name="FtpServerIP">FTP连接地址</param>
        /// <param name="FtpRemotePath">指定FTP连接成功后的当前目录, 如果不指定即默认为根目录</param>
        /// <param name="FtpUserID">用户名</param>
        /// <param name="FtpPassword">密码</param>
        public FtpWeb( string FtpServerIP, string FtpRemotePath, string FtpUserID, string FtpPassword)
        {
            ftpServerIP = FtpServerIP;
            ftpRemotePath = FtpRemotePath;
            ftpUserID = FtpUserID;
            ftpPassword = FtpPassword;
            ftpURI = "ftp://" + ftpServerIP + "/" + ftpRemotePath + "/" ;
        }

        /// <summary>
        /// 上传
        /// </summary>
        /// <param name="filename"></param>
        public void Upload( string filename)
        {
            FileInfo fileInf = new FileInfo(filename);
            string uri = ftpURI + fileInf.Name;
            FtpWebRequest reqFTP;

            reqFTP = (FtpWebRequest)FtpWebRequest.Create( new Uri(uri));
            reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
            reqFTP.KeepAlive = false ;
            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
            reqFTP.UseBinary = true ;
            reqFTP.ContentLength = fileInf.Length;
            int buffLength = 2048;
            byte [] buff = new byte [buffLength];
            int contentLen;
            FileStream fs = fileInf.OpenRead();
            try
            {
                Stream strm = reqFTP.GetRequestStream();
                contentLen = fs.Read(buff, 0, buffLength);
                while (contentLen != 0)
                {
                    strm.Write(buff, 0, contentLen);
                    contentLen = fs.Read(buff, 0, buffLength);
                }
                strm.Close();
                fs.Close();
            }
            catch (Exception ex)
            {
                Insert_Standard_ErrorLog.Insert( "FtpWeb" , "Upload Error --> " + ex.Message);
            }
        }

        /// <summary>
        /// 下载
        /// </summary>
        /// <param name="filePath"></param>
        /// <param name="fileName"></param>
        public void Download( string filePath, string fileName)
        {
            FtpWebRequest reqFTP;
            try
            {
                FileStream outputStream = new FileStream(filePath + "\\" + fileName, FileMode.Create);

                reqFTP = (FtpWebRequest)FtpWebRequest.Create( new Uri(ftpURI + fileName));
                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
                reqFTP.UseBinary = true ;
                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);
                while (readCount > 0)
                {
                    outputStream.Write(buffer, 0, readCount);
                    readCount = ftpStream.Read(buffer, 0, bufferSize);
                }

                ftpStream.Close();
                outputStream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                Insert_Standard_ErrorLog.Insert( "FtpWeb" , "Download Error --> " + ex.Message);
            }
        }


        /// <summary>
        /// 删除文件
        /// </summary>
        /// <param name="fileName"></param>
        public void Delete( string fileName)
        {
            try
            {
                string uri = ftpURI + fileName;
                FtpWebRequest reqFTP;
                reqFTP = (FtpWebRequest)FtpWebRequest.Create( new Uri(uri));

                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                reqFTP.KeepAlive = false ;
                reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;

                string result = String.Empty;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                long size = response.ContentLength;
                Stream datastream = response.GetResponseStream();
                StreamReader sr = new StreamReader(datastream);
                result = sr.ReadToEnd();
                sr.Close();
                datastream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                Insert_Standard_ErrorLog.Insert( "FtpWeb" , "Delete Error --> " + ex.Message + "  文件名:" + fileName);
            }
        }

        /// <summary>
        /// 删除文件夹
        /// </summary>
        /// <param name="folderName"></param>
        public void RemoveDirectory( string folderName)
        {
            try
            {
                string uri = ftpURI + folderName;
                FtpWebRequest reqFTP;
                reqFTP = (FtpWebRequest)FtpWebRequest.Create( new Uri(uri));

                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                reqFTP.KeepAlive = false ;
                reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory;

                string result = String.Empty;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                long size = response.ContentLength;
                Stream datastream = response.GetResponseStream();
                StreamReader sr = new StreamReader(datastream);
                result = sr.ReadToEnd();
                sr.Close();
                datastream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                Insert_Standard_ErrorLog.Insert( "FtpWeb" , "Delete Error --> " + ex.Message + "  文件名:" + folderName);
            }
        }

        /// <summary>
        /// 获取当前目录下明细(包含文件和文件夹)
        /// </summary>
        /// <returns></returns>
        public string [] GetFilesDetailList()
        {
            string [] downloadFiles;
            try
            {
                StringBuilder result = new StringBuilder();
                FtpWebRequest ftp;
                ftp = (FtpWebRequest)FtpWebRequest.Create( new Uri(ftpURI));
                ftp.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                ftp.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
                WebResponse response = ftp.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.Default);

                //while (reader.Read() > 0)
                //{

                //}
                string line = reader.ReadLine();
                //line = reader.ReadLine();
                //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)
            {
                downloadFiles = null ;
                Insert_Standard_ErrorLog.Insert( "FtpWeb" , "GetFilesDetailList Error --> " + ex.Message);
                return downloadFiles;
            }
        }

        /// <summary>
        /// 获取当前目录下文件列表(仅文件)
        /// </summary>
        /// <returns></returns>
        public string [] GetFileList( string mask)
        {
            string [] downloadFiles;
            StringBuilder result = new StringBuilder();
            FtpWebRequest reqFTP;
            try
            {
                reqFTP = (FtpWebRequest)FtpWebRequest.Create( new Uri(ftpURI));
                reqFTP.UseBinary = true ;
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;
                WebResponse response = reqFTP.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.Default);

                string line = reader.ReadLine();
                while (line != null )
                {
                    if (mask.Trim() != string .Empty && mask.Trim() != "*.*" )
                    {

                        string mask_ = mask.Substring(0, mask.IndexOf( "*" ));
                        if (line.Substring(0, mask_.Length) == mask_)
                        {
                            result.Append(line);
                            result.Append( "\n" );
                        }
                    }
                    else
                    {
                        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)
            {
                downloadFiles = null ;
                if (ex.Message.Trim() != "远程服务器返回错误: (550) 文件不可用(例如，未找到文件，无法访问文件)。" )
                {
                    Insert_Standard_ErrorLog.Insert( "FtpWeb" , "GetFileList Error --> " + ex.Message.ToString());
                }
                return downloadFiles;
            }
        }

        /// <summary>
        /// 获取当前目录下所有的文件夹列表(仅文件夹)
        /// </summary>
        /// <returns></returns>
        public string [] GetDirectoryList()
        {
            string [] drectory = GetFilesDetailList();
            string m = string .Empty;
            foreach ( string str in drectory)
            {
                int dirPos = str.IndexOf( "<DIR>" );
                if (dirPos>0)
                {
                    /*判断 Windows 风格*/
                    m += str.Substring(dirPos + 5).Trim() + "\n" ;
                }
                else if (str.Trim().Substring(0, 1).ToUpper() == "D" )
                {
                    /*判断 Unix 风格*/
                    string dir = str.Substring(54).Trim();
                    if (dir != "." && dir != ".." )
                    {
                        m += dir + "\n" ;
                    }
                }
            }

            char [] n = new char [] { '\n' };
            return m.Split(n);
        }

        /// <summary>
        /// 判断当前目录下指定的子目录是否存在
        /// </summary>
        /// <param name="RemoteDirectoryName">指定的目录名</param>
        public bool DirectoryExist( string RemoteDirectoryName)
        {
            string [] dirList = GetDirectoryList();
            foreach ( string str in dirList)
            {
                if (str.Trim() == RemoteDirectoryName.Trim())
                {
                    return true ;
                }
            }
            return false ;
        }

        /// <summary>
        /// 判断当前目录下指定的文件是否存在
        /// </summary>
        /// <param name="RemoteFileName">远程文件名</param>
        public bool FileExist( string RemoteFileName)
        {
            string [] fileList = GetFileList( "*.*" );
            foreach ( string str in fileList)
            {
                if (str.Trim() == RemoteFileName.Trim())
                {
                    return true ;
                }
            }
            return false ;
        }

        /// <summary>
        /// 创建文件夹
        /// </summary>
        /// <param name="dirName"></param>
        public void MakeDir( string dirName)
        {
            FtpWebRequest reqFTP;
            try
            {
                // dirName = name of the directory to create.
                reqFTP = (FtpWebRequest)FtpWebRequest.Create( new Uri(ftpURI + dirName));
                reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;
                reqFTP.UseBinary = true ;
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();

                ftpStream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                Insert_Standard_ErrorLog.Insert( "FtpWeb" , "MakeDir Error --> " + ex.Message);
            }
        }

        /// <summary>
        /// 获取指定文件大小
        /// </summary>
        /// <param name="filename"></param>
        /// <returns></returns>
        public long GetFileSize( string filename)
        {
            FtpWebRequest reqFTP;
            long fileSize = 0;
            try
            {
                reqFTP = (FtpWebRequest)FtpWebRequest.Create( new Uri(ftpURI + filename));
                reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;
                reqFTP.UseBinary = true ;
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();
                fileSize = response.ContentLength;

                ftpStream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                Insert_Standard_ErrorLog.Insert( "FtpWeb" , "GetFileSize Error --> " + ex.Message);
            }
            return fileSize;
        }

        /// <summary>
        /// 改名
        /// </summary>
        /// <param name="currentFilename"></param>
        /// <param name="newFilename"></param>
        public void ReName( string currentFilename, string newFilename)
        {
            FtpWebRequest reqFTP;
            try
            {
                reqFTP = (FtpWebRequest)FtpWebRequest.Create( new Uri(ftpURI + currentFilename));
                reqFTP.Method = WebRequestMethods.Ftp.Rename;
                reqFTP.RenameTo = newFilename;
                reqFTP.UseBinary = true ;
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();

                ftpStream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                Insert_Standard_ErrorLog.Insert( "FtpWeb" , "ReName Error --> " + ex.Message);
            }
        }

        /// <summary>
        /// 移动文件
        /// </summary>
        /// <param name="currentFilename"></param>
        /// <param name="newFilename"></param>
        public void MovieFile( string currentFilename, string newDirectory)
        {
            ReName(currentFilename, newDirectory);
        }

        /// <summary>
        /// 切换当前目录
        /// </summary>
        /// <param name="DirectoryName"></param>
        /// <param name="IsRoot">true 绝对路径   false 相对路径</param>
        public void GotoDirectory( string DirectoryName, bool IsRoot)
        {
            if (IsRoot)
            {
                ftpRemotePath = DirectoryName;
            }
            else
            {
                ftpRemotePath += DirectoryName + "/" ;
            }
            ftpURI = "ftp://" + ftpServerIP + "/" + ftpRemotePath + "/" ;
        }

        /// <summary>
        /// 删除订单目录
        /// </summary>
        /// <param name="ftpServerIP">FTP 主机地址</param>
        /// <param name="folderToDelete">FTP 用户名</param>
        /// <param name="ftpUserID">FTP 用户名</param>
        /// <param name="ftpPassword">FTP 密码</param>
        public static void DeleteOrderDirectory( string ftpServerIP, string folderToDelete, string ftpUserID, string ftpPassword)
        {
            try {
                if (! string .IsNullOrEmpty(ftpServerIP) && ! string .IsNullOrEmpty(folderToDelete) && ! string .IsNullOrEmpty(ftpUserID) && ! string .IsNullOrEmpty(ftpPassword))
                {
                    FtpWeb fw = new FtpWeb(ftpServerIP, folderToDelete, ftpUserID, ftpPassword);
                    //进入订单目录
                    fw.GotoDirectory(folderToDelete, true );
                    //获取规格目录
                    string [] folders = fw.GetDirectoryList();
                    foreach ( string folder in folders)
                    {
                        if (! string .IsNullOrEmpty(folder) || folder != "" )
                        {
                            //进入订单目录
                            string subFolder = folderToDelete + "/" + folder;
                            fw.GotoDirectory(subFolder, true );
                            //获取文件列表
                            string [] files = fw.GetFileList( "*.*" );
                            if (files != null )
                            {
                                //删除文件
                                foreach ( string file in files)
                                {
                                    fw.Delete(file);
                                }
                            }
                            //删除冲印规格文件夹
                            fw.GotoDirectory(folderToDelete, true );
                            fw.RemoveDirectory(folder);
                        }
                    }

                    //删除订单文件夹
                    string parentFolder = folderToDelete.Remove(folderToDelete.LastIndexOf( '/' ));
                    string orderFolder = folderToDelete.Substring(folderToDelete.LastIndexOf( '/' ) + 1);
                    fw.GotoDirectory(parentFolder, true );
                    fw.RemoveDirectory(orderFolder);
                }
                else
                {
                    throw new Exception( "FTP 及路径不能为空！" );
                }
            }
            catch (Exception ex)
            {
                throw new Exception( "删除订单时发生错误，错误信息为：" + ex.Message);
            }
        }
    }


    public class Insert_Standard_ErrorLog
    {
        public static void Insert( string x, string y)
        {

        }
    }


}