C# FTP操作类

public class FtpWeb  
{  
    string ftpRemotePath;  
    string ftpUserID;  
    string ftpPassword;  
    string ftpURI;  
    string ftpServerIP;  
  
    /// <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 FtpUserID, string FtpPassword)  
    {  
        ftpServerIP = FtpServerIP;  
        ftpUserID = FtpUserID;  
        ftpPassword = FtpPassword;  
        ftpURI = FtpServerIP + "/";  
    }  
  
    /// <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)  
        {  
            throw ex;  
        }  
    }  
    /// <summary>  
    /// 上传  
    /// </summary>  
    /// <param name="filename"></param>  
    public void Upload2(string ftpuri, string filename)  
    {  
        FileInfo fileInf = new FileInfo(filename);  
        string uri = ftpuri;  
        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)  
        {  
            throw ex;  
        }  
    }  
    /// <summary>  
    /// 下载  
    /// </summary>  
    /// <param name="filePath"></param>  
    /// <param name="fileName"></param>  
    public void Download(string filePath, string ftpUri, string fileName)  
    {  
        FtpWebRequest reqFTP;  
        try  
        {  
            FileStream outputStream = new FileStream(filePath + "\" + fileName, FileMode.Create);  
  
            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpUri));  
            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)  
        {  
            throw ex;  
        }  
    }  
  
  
    /// <summary>  
    /// 删除文件  
    /// </summary>  
    /// <param name="fileName"></param>  
    public void Delete(string fileName)  
    {  
        try  
        {  
            string uri = 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)  
        {  
            throw ex;  
        }  
    }  
  
    /// <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)  
        {  
            throw ex;  
        }  
    }  
  
    /// <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);  
            string line = reader.ReadLine();  
  
            while (line != null)  
            {  
                result.Append(line);  
                result.Append("
");  
                line = reader.ReadLine();  
            }  
            result.Remove(result.ToString().LastIndexOf("
"), 1);  
            reader.Close();  
            response.Close();  
            return result.ToString().Split('
');  
        }  
        catch (Exception ex)  
        {  
            downloadFiles = null;  
            throw ex;  
        }  
    }  
  
    /// <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("
");  
                    }  
                }  
                else  
                {  
                    result.Append(line);  
                    result.Append("
");  
                }  
                line = reader.ReadLine();  
            }  
            result.Remove(result.ToString().LastIndexOf('
'), 1);  
            reader.Close();  
            response.Close();  
            return result.ToString().Split('
');  
        }  
        catch (Exception ex)  
        {  
            downloadFiles = null;  
            throw ex;  
        }  
    }  
  
    /// <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() + "
";  
            }  
            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 + "
";  
                }  
            }  
        }  
  
        char[] n = new char[] { '
' };  
        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)  
    {  
        try  
        {  
            string[] dirList = GetDirectoryList();  
  
            foreach (string str in dirList)  
            {  
                if (str.Trim() == RemoteDirectoryName.Trim())  
                {  
                    return true;  
                }  
            }  
            return false;  
        }  
        catch  
        {  
            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)  
        {  
            throw ex;  
        }  
    }  
  
    /// <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)  
        {  
            throw ex;  
        }  
        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)  
        {  
            throw ex;  
        }  
    }  
  
    /// <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 + "/";  
    }  
}