C# FTP上传

 public class FtpHelper
    {
        public FtpHelper(string p_url, string p_user, string p_password)
        {
            if (!p_url.ToUpper().StartsWith("FTP:"))
            {
                Url = "ftp://" + p_url;
            }
            else
            {
                Url = p_url;
            }
            User = p_user;
            Password = p_password;
        }

        public string Url { get; private set; }

        public string User { get; private set; }

        public string Password { get; private set; }

        public FtpWebRequest CreateConnect(string p_uri)
        {
            FtpWebRequest reqFTP;

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

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

            return reqFTP;
        }

        /// <summary>
        /// 上传文件
        /// </summary>
        /// <param name="p_uri">ftp地址 ex=ftp://192.168.100.5//tmp// 切记要以//结尾</param>
        /// <param name="p_filename">文件路径地址绝对路径 ex:C:\\Users\ligl\\Desktop\\1.txt</param>
        /// <param name="isDelete"></param>
        /// <returns></returns>
        public bool Upload(string p_uri, string p_filename, bool isDelete = false)
        {
            var fileInf = new FileInfo(p_filename);
            string uri = Path.Combine(p_uri, fileInf.Name);

            FtpWebRequest reqFTP = CreateConnect(uri);
            // 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;

            // 上传文件时通知服务器文件的大小
            reqFTP.ContentLength = fileInf.Length + 20;

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

            var 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();

                var uploadResponse = (FtpWebResponse)reqFTP.GetResponse();
                if (File.Exists(p_filename) && isDelete)
                {
                    File.Delete(p_filename);
                }
                return (uploadResponse.StatusDescription.StartsWith("226"));
            }
            catch (Exception ex)
            {
                //System.Windows.MessageBox.Show(ex.Message, "Upload Error");
                throw ex;
            }
        }

        public bool Delete(string p_filename)
        {
            var fileInf = new FileInfo(p_filename);
            string uri = Path.Combine(Url, fileInf.Name);

            try
            {
                var listRequest = (FtpWebRequest)WebRequest.Create(new Uri(uri));

                listRequest.Method = WebRequestMethods.Ftp.DeleteFile;

                listRequest.Credentials = new NetworkCredential(User, Password);

                var listResponse = (FtpWebResponse)listRequest.GetResponse();

                return (listResponse.StatusDescription.StartsWith("250"));
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        public bool MakeDir(string p_uri)
        {
            try
            {
                string url = Url;
                if (string.IsNullOrEmpty(url))
                {
                    return false;
                }

                char lastChar = url[url.Length - 1];
                if (lastChar != '\\' && lastChar != '/')
                {
                    url += '\\';
                }

                string dir = p_uri.Remove(0, url.Length);

                string[] dirs = dir.Split(new[] { Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar },
                                          StringSplitOptions.RemoveEmptyEntries);

                dir = CreateDir(dirs);

                return CreateMackDir(url, dir);
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        public string CreateDir(string[] p_dirNames)
        {
            var sb = new StringBuilder();

            foreach (string dir in p_dirNames)
            {
                sb.Append(dir);
                sb.Append("\\");
            }

            return sb.ToString();
        }

        public string GetFirstDir(string p_dir)
        {
            string[] dirs = p_dir.Split(new[] { Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar },
                                        StringSplitOptions.RemoveEmptyEntries);

            if (dirs.Length > 0)
            {
                return dirs[0];
            }

            return string.Empty;
        }

        public string RemvoeDirFromFirst(string p_longDir, string p_firstDir)
        {
            string value = p_longDir.Remove(0, p_firstDir.Length + 1);

            return value;
        }

        private bool CreateMackDir(string p_url, string p_dir)
        {
            string dir = GetFirstDir(p_dir);

            if (string.IsNullOrEmpty(dir))
            {
                return true;
            }

            string newurl = Path.Combine(p_url, dir);
            if (!IsExsit(p_url, dir))
            {
                try
                {
                    FtpWebRequest reqFtp = CreateConnect(newurl);
                    reqFtp.Method = WebRequestMethods.Ftp.MakeDirectory;
                    var response = (FtpWebResponse)reqFtp.GetResponse();
                    response.Close();
                }
                catch (Exception ex)
                {
                    throw ex;
                }
            }

            string newdir = RemvoeDirFromFirst(p_dir, dir);
            CreateMackDir(newurl, newdir);

            return true;
        }

        public bool IsExsit(string p_url, string p_dir)
        {
            string[] list = GetFileList(p_url, WebRequestMethods.Ftp.ListDirectory);

            if (list == null || list.Length == 0)
            {
                return false;
            }

            return list.Contains(p_dir);
        }

        private string[] GetFileList(string path, string WRMethods) //上面的代码示例了如何从ftp服务器上获得文件列表
        {
            var result = new StringBuilder();

            try
            {
                string tempPath = path;
                if (!path.EndsWith("/"))
                {
                    tempPath += "/";
                }

                FtpWebRequest reqFtp = CreateConnect(tempPath);
                reqFtp.Method = WRMethods;
                WebResponse response = reqFtp.GetResponse();
                var reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8); //中文文件名
                string line = reader.ReadLine();
                while (line != null)
                {
                    result.Append(line);
                    result.Append("\n");
                    line = reader.ReadLine();
                }
                // to remove the trailing '/n'
                if (result.Length > 0)
                {
                    result.Remove(result.ToString().LastIndexOf('\n'), 1);
                }
                reader.Close();
                response.Close();
                return result.ToString().Split('\n');
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
    }