菜鸟，求教，关于用C#语言实现文件的上传下载？

Question

请教 如何用C#语言实现文件夹与文件上传到FTP与下载到本地？
谢谢！

Answer 1

 ProductTask productTask = new ProductTask();
                        productTask.ProdInfo = pinfo;
                        productTask.AfterRunTask += new EventHandler<EventArgs>(productTask_AfterRunTask);
结合Ftp上传软件

Answer 2

// 根据uri创建FtpWebRequest对象
                FtpWebRequest ftpReq = (FtpWebRequest)FtpWebRequest.Create(new Uri(strUri));
                // ftp用户名和密码
                ftpReq.Credentials = new NetworkCredential("用户名", "密码");
                // 指定执行什么命令
                ftpReq.Method = WebRequestMethods.Ftp.UploadFile;
                //成功执行一个命令后连接被关闭
                ftpReq.KeepAlive = false;
                //指定数据传输类型为二进制
                ftpReq.UseBinary = true;
                //上传文件时通知服务器文件的大小  
                ftpReq.ContentLength = fi.Length;
                // 缓冲大小设置为2kb  
                int buffLength = 2048;   
                byte[] buff = new byte[buffLength];                int contentLen;
                                try
                {
                    //打开一个文件流去读上传的文件
                    FileStream fs = fi.OpenRead();
                    //把上传的文件写入流
                    Stream strm = ftpReq.GetRequestStream();                    //每次读文件流的2kb 
                    contentLen = fs.Read(buff, 0, buffLength);
                    
                    while (contentLen != 0) // 流内容没有结束
                    {
                        // 把内容从file stream 写入 upload stream 
                        strm.Write(buff, 0, contentLen);   
                        contentLen = fs.Read(buff, 0, buffLength);  
                    }
                    strm.Close();
                    fs.Close();
                }
                catch (Exception e)
                {
                    
                }

Answer 3

FileInfo file = new FileInfo("G:/杂乱/室内设计01.jpg");
                if (file.Exists)
                {
                    Response.Clear();
                    Response.AddHeader("Content-Disposition", "attachment;filename=" + Server.UrlEncode(file.Name));
                    Response.AddHeader("Content-Length", file.Length.ToString());
                    Response.ContentType = "application/octet-stream";
                    Response.Filter.Close();
                    Response.WriteFile(file.FullName);
                    Response.End();
                }ASP.NET 的下载