C# FTP操作类

  前段时间完成来了个项目,中间用到ftp读取、上传文件等操作,也就写了这个FTP类库,发上来给大家共享共享......

//添加引用
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Diagnostics;
using System.Web;
using System.Net;
using System.Collections.Generic;

namespace Yang.FTP
{
    public class Function
    {
/// <summary>
        /// FTP上传文件
        /// </summary>
        /// <param name="filename"></param>
        public static string Upload(string Fromfilename, string Tofilename, string ftpServerIP, string ftpUserID, string ftpPassword)
        {
            string sRet = "OK";
            FileInfo fileInf = new FileInfo(Fromfilename);
            string uri = "ftp://" + ftpServerIP + "/" + Tofilename;
            FtpWebRequest reqFTP;

            // 根据uri创建FtpWebRequest对象 
            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));

            // ftp用户名和密码
            reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);

            // 默认为true,连接不会被关闭
            // 在一个命令之后被执行
            reqFTP.KeepAlive = false;

            // 指定执行什么命令
            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;

            // 指定数据传输类型
            reqFTP.UseBinary = true;
            reqFTP.UsePassive = false;

            // 上传文件时通知服务器文件的大小
            reqFTP.ContentLength = fileInf.Length;

            // 缓冲大小设置为2kb
            int buffLength = 2048;

            byte[] buff = new byte[buffLength];
            int contentLen;

            // 打开一个文件流 (System.IO.FileStream) 去读上传的文件
            FileStream fs = fileInf.OpenRead();

            try
            {
                // 把上传的文件写入流
                Stream strm = reqFTP.GetRequestStream();

                // 每次读文件流的2kb
                contentLen = fs.Read(buff, 0, buffLength);

                // 流内容没有结束
                while (contentLen != 0)
                {
                    // 把内容从file stream 写入 upload stream
                    strm.Write(buff, 0, contentLen);

                    contentLen = fs.Read(buff, 0, buffLength);
                }

                // 关闭两个流
                strm.Close();
                fs.Close();
            }
            catch (Exception ex)
            {
                //MessageBox.Show(ex.Message, "Upload Error");
                //throw (ex);
                sRet = ex.Message;
            }
            return sRet;
        }

        /// <summary>
        /// FTP下载文件
        /// </summary>
        /// <param name="filePath"></param>
        /// <param name="fileName"></param>
        public static string Download(string fromFilePath, string fileName, string ftpServerIP, string ftpUserID, string ftpPassword, string TermID)
        {
            string sRet = "OK";
            FtpWebRequest reqFTP;

            try
            {
                string filePath = Environment.CurrentDirectory + "\\Data\\" + TermID;
                if (!System.IO.Directory.Exists(filePath))
                {
                    Directory.CreateDirectory(filePath);
                }

                filePath = filePath + "\\" + fileName;
                fromFilePath = fromFilePath + "\\" + fileName;

                if (File.Exists(filePath)) File.Delete(filePath);

                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + fromFilePath));

                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;

                reqFTP.UseBinary = true;

                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);

                reqFTP.UsePassive = false;

                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(filePath, FileMode.Create);

                while (readCount > 0)
                {
                    outputStream.Write(buffer, 0, readCount);

                    readCount = ftpStream.Read(buffer, 0, bufferSize);
                }

                outputStream.Flush();

                outputStream.Close();
                ftpStream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                //MessageBox.Show(ex.Message);
                //throw (ex);
                sRet = ex.Message;

            }
            return sRet;
        }

        /// <summary>
        /// FTP创建目录
        /// </summary>
        /// <param name="ftpServerIP"></param>
        /// <param name="ftpUserID"></param>
        /// <param name="ftpPassword"></param>
        /// <param name="TermID"></param>
        /// <param name="dirName"></param>
        /// <returns></returns>
        public static string MakeDir(string dirName, string ftpServerIP, string ftpUserID, string ftpPassword)
        {
            string sRet = "OK";
            try
            {
                string uri = "ftp://" + ftpServerIP + "/" + dirName;
                FtpWebRequest reqFTP;

                // 根据uri创建FtpWebRequest对象 
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));

                // ftp用户名和密码
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);

                // 默认为true,连接不会被关闭
                // 在一个命令之后被执行
                reqFTP.KeepAlive = false;

                // 指定执行什么命令
                reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;

                // 指定数据传输类型
                reqFTP.UseBinary = true;

                FtpWebResponse respFTP = (FtpWebResponse)reqFTP.GetResponse();
                respFTP.Close();
            }
            catch (Exception ex)
            {
                sRet = ex.Message;
            }
            return sRet;
        }

        /// <summary>
        /// 获取文件列表
        /// </summary>
        /// <returns></returns>
        public static string[] GetFileList(string ftpServerIP, string ftpUserID, string ftpPassword)
        {
            string[] downloadFiles;
            StringBuilder result = new StringBuilder();
            FtpWebRequest reqFTP;
            try
            {
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/"));
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;
                WebResponse response = reqFTP.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream());
                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)
            {
                Console.WriteLine(ex.Message);
                downloadFiles = null;
                return downloadFiles;
            }
        }

        /// <summary>
        /// 获取目录列表
        /// </summary>
        /// <returns></returns>
        public static List<string> GetDirList(string ftpServerIP, string ftpUserID, string ftpPassword, string dirName, string fileOrDir)
        {
            List<string> downloadFiles = new List<string>();
            StringBuilder result = new StringBuilder();
            FtpWebRequest reqFTP;
            try
            {
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + dirName));
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
                WebResponse response = reqFTP.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream());
                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();

                string[] strsFileList = result.ToString().Split('\n');

                if (fileOrDir.ToLower() == "f")
                {
                    fileOrDir = "-rw-rw-rw";
                }
                else
                {
                    fileOrDir = "drw-rw-rw";
                }

                //解析文件夹
                foreach (string s in strsFileList)
                {
                    if (s.IndexOf(fileOrDir) >= 0)
                    {
                        string s2 = "";
                        string[] sl1 = s.Split(' ');
                        int j = 0;
                        for (int i = 0; i < sl1.Length; i++)
                        {
                            //非空项
                            if (sl1[i] != "")
                            {
                                j++;
                            }

                            //超过9以上开始系文件夹
                            if (j > 8)
                            {
                                s2 = sl1[i] + " ";
                            }
                        }
                        s2 = s2.Trim();

                        if (s2 != "." && s2 != "..")
                        {
                            downloadFiles.Add(s2);
                        }
                    }
                }

                return downloadFiles;
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                //downloadFiles = null;
                return downloadFiles;
            }
        }

        /// <summary>
        /// 删除指定文件
        /// </summary>
        /// <param name="fileName">远程文件的路径【示例:uploads/myfile.rar】</param>
        public static string DeleteFileName(string fileName, string ftpServerIP, string ftpUserID, string ftpPassword)
        {
            string sRet = "OK";
            string uri = "ftp://" + ftpServerIP + "/" + fileName;
            FtpWebRequest reqFTP;

            try
            {
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + fileName));
                // 在一个命令之后被执行
                reqFTP.KeepAlive = false;
                // 指定执行什么命令
                reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;

                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);

                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                response.Close();

            }
            catch (Exception ex)
            {
                sRet = ex.Message;
            }

            return sRet;
        }
    }
}

 

posted @ 2012-05-31 15:02  阳峰  阅读(2763)  评论(7编辑  收藏  举报