c# ftp 上传文件 与 下载文件
接着上一篇说。
上一篇说了根据配置文件获取路径,并判断路径在服务器中是否存在。如果不存在则在服务器中建立一个。
然后就是往路径下面传输文件了。、
代码:
//连接ftp private void Connect(String path) { // 根据uri创建FtpWebRequest对象 reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(path)); // 指定数据传输类型 reqFTP.Method = System.Net.WebRequestMethods.Ftp.UploadFile; reqFTP.UseBinary = true; reqFTP.UsePassive = false; // ftp用户名和密码 reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword); }
public void Upload(string filename) //上面的代码实现了从ftp服务器上载文件的功能 { FileInfo fileInf = new FileInfo(filename); string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name; Connect(uri);//连接 // 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; // 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kb 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 { int allbye = (int)fileInf.Length; int startbye = 0;// 把上传的文件写入流 Stream strm = reqFTP.GetRequestStream();//根据服务器的FTP配置不同,要使用不同的模式,否则会报错 // 每次读文件流的kb 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); startbye += buffLength; }// 关闭两个流 strm.Close(); fs.Close(); } catch (Exception ex) { this.WriteLog("上传失败,原因: " + ex.Message); fs.Close(); } }
/// <summary> /// 下载文件 /// </summary> /// <param name="fileName"></param> /// <returns></returns> public Byte[] Download(string fileName)/**/////上面的代码实现了从ftp服务器下载文件的功能 { Byte[] rtn = null; try { long allbye = (long)GetFileSize(fileName); string url = "ftp://" + ftpServerIP + "/" + fileName; Connect(url);//连接 reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword); reqFTP.KeepAlive = false; FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse(); Stream ftpStream = response.GetResponseStream(); long cl = response.ContentLength; int bufferSize = 2048; int readCount = 0; byte[] buffer = new byte[bufferSize]; readCount = ftpStream.Read(buffer, 0, bufferSize); MemoryStream mstream = new MemoryStream(); int startbye = 0; while (readCount > 0) { mstream.Write(buffer, 0, readCount); readCount = ftpStream.Read(buffer, 0, bufferSize); startbye += readCount; } rtn = mstream.ToArray(); ftpStream.Close(); response.Close(); mstream.Close(); return rtn; } catch (Exception ex) { //errorinfo = string.Format("因{0},无法下载", ex.Message); throw new Exception("下载失败,原因: " + ex.Message); } }