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C#操作FTP帮助类
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C#操作FTP帮助类

using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;

namespace Common
{
    /// 

    /// FTP操作类
    /// 20180403 周黎编写
    /// 
    public class FTPHelpers
    {
        /// 

        /// FTP地址
        /// 
        private string _ftpServerIp;
        /// 

        /// FTP目录下准备操作文件夹名称
        /// 
        private string _ftpRemotePath;
        /// 

        /// FTP目录下准备操作文件夹名称
        /// 
        public string FtpRemotePath
        {
            get { return _ftpRemotePath; }
            set
            {
                _ftpRemotePath = value;
                if (!string.IsNullOrWhiteSpace(_ftpRemotePath))
                    this._ftpUri = "ftp://" + _ftpServerIp + "/" + _ftpRemotePath + "/";
                else
                    this._ftpUri = "ftp://" + _ftpServerIp + "/";
            }
        }
        /// 

        /// FTP账号
        /// 
        private string _ftpUserId;
        /// 

        /// FTP密码
        /// 
        private string _ftpPassword;

        private string _localSavePath;
        /// 

        /// FTP当前操作目录
        /// 
        private string _ftpUri;
        /// 

        /// 初始化参数
        /// 
        /// 
        /// 
        /// 
        /// 
        /// 
        public void InitFtp(string ftpServerIp, string ftpRemotePath, string ftpUserId, string ftpPassword, string localSavePath)
        {
            this._ftpServerIp = ftpServerIp;
            this._ftpUserId = ftpUserId;
            this._ftpPassword = ftpPassword;
            this._localSavePath = localSavePath;

            FtpRemotePath = ftpRemotePath;
            if (!string.IsNullOrWhiteSpace(this._localSavePath) && !Directory.Exists(this._localSavePath))
            {
                try
                {
                    Directory.CreateDirectory(this._localSavePath);
                }
                catch { }
            }
        }

        public void InitFtp(string ftpServerIp, string ftpUserId, string ftpPassword, string localSavePath)
        {
            InitFtp(ftpServerIp, "", ftpUserId, ftpPassword, localSavePath);
        }

        /// 

        /// 上传
        /// 
        /// 
        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 = null;
            try
            {
                fs = fileInf.OpenRead();
                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();
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (fs != null)
                    fs.Close();
            }
        }

        public void Upload(byte[] buffer, string filename)
        {
            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.UploadFile;
            reqFTP.UseBinary = true;
            reqFTP.ContentLength = buffer.Length;
            try
            {
                Stream strm = reqFTP.GetRequestStream();
                strm.Write(buffer, 0, buffer.Length);
                strm.Close();
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        public void Upload(string ftpUri, string ftpUserId, string ftpPassword, string filename)
        {
            FileStream fs = null;
            try
            {
                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;
                fs = fileInf.OpenRead();

                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();
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (fs != null)
                    fs.Close();
            }
        }

        /// 

        /// 下载
        /// 
        /// 
        /// 
        public string Download(string fileName)
        {
            if (string.IsNullOrEmpty(fileName))
                return null;

            FtpWebRequest reqFTP;
            FileStream outputStream = null;
            FileStream fs = null;
            string content = "";
            try
            {
                outputStream = new FileStream(_localSavePath + "\\" + fileName, FileMode.Create);

                reqFTP = (FtpWebRequest)WebRequest.Create(new Uri(_ftpUri + fileName));

                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(_ftpUserId, _ftpPassword);
                var response = (FtpWebResponse)reqFTP.GetResponse();
                var ftpStream = response.GetResponseStream();
                var cl = response.ContentLength;
                var 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();
                //Buffer.Log(string.Format("Ftp文件{1}下载成功!" , DateTime.Now.ToString(), fileName));

                fs = new FileStream(_localSavePath + "\\" + fileName, FileMode.Open);
                var sr = new StreamReader(fs);

                content = sr.ReadToEnd();

                sr.Close();
                fs.Close();

                Delete(fileName);
            }
            catch (Exception ex)
            {
                if (outputStream != null)
                    outputStream.Close();
                if (fs != null)
                    fs.Close();
                throw ex;
            }

            return content;

        }

        public byte[] DownloadByte(string fileName)
        {
            if (string.IsNullOrEmpty(fileName))
                return null;

            FtpWebRequest reqFTP;
            byte[] buff = null;
            try
            {

                reqFTP = (FtpWebRequest)WebRequest.Create(new Uri(_ftpUri + fileName));

                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(_ftpUserId, _ftpPassword);
                var response = (FtpWebResponse)reqFTP.GetResponse();
                var ftpStream = response.GetResponseStream();

                MemoryStream stmMemory = new MemoryStream();
                byte[] buffer = new byte[64 * 1024];
                int i;
                while ((i = ftpStream.Read(buffer, 0, buffer.Length)) > 0)
                {
                    stmMemory.Write(buffer, 0, i);
                }
                buff = stmMemory.ToArray();
                stmMemory.Close();
                ftpStream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                throw ex;
            }

            return buff;

        }

        /// 

        /// 删除文件(根据文件名进行删除需要指定操作路径)
        /// 
        /// 
        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();
                //Buffer.Log(string.Format("Ftp文件{1}删除成功!", DateTime.Now.ToString(), fileName));
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
        /// 

        /// 删除文件夹(只针对空文件夹)
        /// 
        /// 
        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;
            }
        }

        /// 

        /// 删除文件夹以及其下面的所有内容
        /// 
        /// ftp
        public void DeleteFtpDirWithAll(FTPHelpers ftp, bool isdelDqFile = true)
        {
            string[] fileList = ftp.GetFileList("");//获取所有文件列表(仅文件)
            //1.首先删除所有的文件
            if (fileList != null && fileList.Length > 0)
            {
                foreach (string file in fileList)
                {
                    ftp.Delete(file);
                }
            }
            //获取所有文件夹列表(仅文件夹)
            string[] emptyDriList = ftp.GetDirectoryList();
            foreach (string dir in emptyDriList)
            {
                //有时候会出现空的子目录,这时候要排除
                if (string.IsNullOrWhiteSpace(dir))
                {
                    continue;
                }
                string curDir = "/" + dir;
                ftp.FtpRemotePath = ftp.FtpRemotePath + curDir;
                //(判断当前目录下是否有文件,有则删除)
                if (ftp.GetFileList("") != null && ftp.GetFileList("").Length > 0)
                {
                    foreach (string file in ftp.GetFileList(""))
                    {
                        ftp.Delete(file);
                    }
                }
                //是否有子文件夹存在
                if (ftp.GetDirectoryList() != null && ftp.GetDirectoryList().Length > 0)
                {
                    DeleteFtpDirWithAll(ftp);//如果有就继续递归
                }
                ftp.FtpRemotePath = ftp.FtpRemotePath.Replace(curDir, "");//回退到上级目录以删除其本身
                ftp.RemoveDirectory(dir);//删除当前文件夹
            }
            if (isdelDqFile && emptyDriList.Length > 0)
                ftp.RemoveDirectory("");
        }
        /// 

        /// 获取当前目录下明细(包含文件和文件夹)
        /// 
        /// 
        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.UTF8);

                //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();
                }
                if (result.Length == 0)
                    return null;
                result.Remove(result.ToString().LastIndexOf("\n"), 1);
                reader.Close();
                response.Close();
                return result.ToString().Split('\n');

            }
            catch (Exception ex)
            {


                return null;
            }
        }

        /// 

        /// 获取当前目录下文件列表(仅文件)
        /// 
        /// 
        /// 
        public string[] GetFileList(string mask)
        {
            string[] downloadFiles = null;
            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.UTF8);

                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();
                }
                if (result.Length == 0)
                    return new string[] { };
                result.Remove(result.ToString().LastIndexOf('\n'), 1);
                reader.Close();
                response.Close();
                downloadFiles = result.ToString().Split('\n');
                //ArrayList list = new ArrayList(downloadFiles);
                //list.RemoveAt(downloadFiles.Length - 1);
                //downloadFiles= list.ToArray(typeof(string)) as string[];
            }
            catch (Exception ex)
            {
                return new string[] { };
            }

            if (downloadFiles == null)
                downloadFiles = new string[] { };
            return downloadFiles;
        }

        public string GetSingleFile()
        {
            var list = GetFileList("*.*");

            if (list != null && list.Length > 0)
                return list[0];
            else
                return null;
        }

        /// 

        /// 获取当前目录下所有的文件夹列表(仅文件夹)
        /// 
        /// 
        public string[] GetDirectoryList()
        {
            string[] drectory = GetFilesDetailList();
            if (drectory == null)
                return new string[] { };
            string m = string.Empty;
            foreach (string str in drectory)
            {
                int dirPos = str.IndexOf("
");
                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' };
            ArrayList list = new ArrayList(m.Split(n));
            list.RemoveAt(m.Split(n).Length - 1);
            return list.ToArray(typeof(string)) as string[];
        }

        /// 

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

        /// 

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

        /// 

        /// 创建文件夹
        /// 
        /// 
        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;
            }
        }

        /// 

        /// 获取指定文件大小
        /// 
        /// 
        /// 
        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 new Exception("FtpWeb:GetFileSize Error --> " + ex.Message);
            }
            return fileSize;
        }

        /// 

        /// 改名
        /// 
        /// 
        /// 
        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;
            }
        }

        /// 

        /// 移动文件
        /// 
        /// 
        /// 
        public void MovieFile(string currentFilename, string newDirectory)
        {
            ReName(currentFilename, newDirectory);
        }

    }
}

标题:C#操作FTP帮助类
作者:小周黎
地址:https://zhouli.info/articles/2020/04/01/1585728135406.html