jiaoye6789
jiaoye6789
2016-08-08 08:53
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从FTP下载图片,不保存到本地,以流存储怎么实现

现在做的是下载到本地,
想做成不要下载,直接return流

  public void Download(string ftpPath, string filePath, string fileName)
        {
            filePath = "D:\\迅雷下载\\";
            fileName = "图片.jpg";
            ftpPath = "ftp://192.168.1.10/Pictures/201684/20160804091003-955-(蓝京A12345)1-全景图.jpg";
            string sRet = "下载成功!";
            FtpWebRequest reqFTP;
            try
            {
                FileStream outputStream = new FileStream(filePath + fileName, FileMode.Create);

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

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

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

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

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

                // 把下载的文件写入流
                Stream ftpStream = response.GetResponseStream();

                long cl = response.ContentLength;

                // 缓冲大小设置为2kb  
                int bufferSize = 2048;
                int readCount;
                byte[] buffer = new byte[bufferSize];

                // 每次读文件流的2kb  
                readCount = ftpStream.Read(buffer, 0, bufferSize);
                while (readCount > 0)
                {
                    // 把内容从文件流写入   
                    outputStream.Write(buffer, 0, readCount);
                    readCount = ftpStream.Read(buffer, 0, bufferSize);
                }

                //关闭两个流和ftp连接
                ftpStream.Close();
                outputStream.Close();
                response.Close();


            }
            catch (Exception ex)
            {
                sRet = ex.Message;
            }
        }  
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1条回答 默认 最新

  • caozhy
    已采纳

    把你的FileStream换成MemoryStream,别的不变。

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