c#实现FTP上传

  1         /// <summary>  2         /// 上传文件  3         /// </summary>  4         /// <param name="fileinfo">需要上传的文件</param>  5         /// <param name="targetDir">目标路径</param>  6         /// <param name="hostname">ftp地址</param>  7         /// <param name="username">ftp用户名</param>  8         /// <param name="passWord">ftp密码</param>  9         public static void UploadFile(FileInfo fileinfo, string targetDir, string hostname, string username, string password) 10         { 11             //1. check target 12             string target; 13             if (targetDir.Trim() == "") 14             { 15                 return; 16             } 17             target = Guid.NewGuid().ToString();  //使用临时文件名 18  19  20             string URI = "FTP://" + hostname + "/" + targetDir + "/" + target; 21             ///WebClient webcl = new WebClient(); 22             System.Net.FtpWebRequest ftp = GetRequest(URI, username, password); 23  24             //设置FTP命令 设置所要执行的FTP命令， 25             //ftp.Method = System.Net.WebRequestMethods.Ftp.ListDirectoryDetails;//假设此处为显示指定路径下的文件列表 26             ftp.Method = System.Net.WebRequestMethods.Ftp.UploadFile; 27             //指定文件传输的数据类型 28             ftp.UseBinary = true; 29             ftp.UsePassive = true; 30  31             //告诉ftp文件大小 32             ftp.ContentLength = fileinfo.Length; 33             //缓冲大小设置为2KB 34             const int BufferSize = 2048; 35             byte[] content = new byte[BufferSize - 1 + 1]; 36             int dataRead; 37  38             //打开一个文件流 (System.IO.FileStream) 去读上传的文件 39             using (FileStream fs = fileinfo.OpenRead()) 40             { 41                 try 42                 { 43                     //把上传的文件写入流 44                     using (Stream rs = ftp.GetRequestStream()) 45                     { 46                         do 47                         { 48                             //每次读文件流的2KB 49                             dataRead = fs.Read(content, 0, BufferSize); 50                             rs.Write(content, 0, dataRead); 51                         } while (!(dataRead < BufferSize)); 52                         rs.Close(); 53                     } 54  55                 } 56                 catch (Exception ex) { } 57                 finally 58                 { 59                     fs.Close(); 60                 } 61  62             } 63  64             ftp = null; 65             //设置FTP命令 66             ftp = GetRequest(URI, username, password); 67             ftp.Method = System.Net.WebRequestMethods.Ftp.Rename; //改名 68             ftp.RenameTo = fileinfo.Name; 69             try 70             { 71                 ftp.GetResponse(); 72             } 73             catch (Exception ex) 74             { 75                 ftp = GetRequest(URI, username, password); 76                 ftp.Method = System.Net.WebRequestMethods.Ftp.DeleteFile; //删除 77                 ftp.GetResponse(); 78                 throw ex; 79             } 80             finally 81             { 82                 //fileinfo.Delete(); 83             } 84  85             // 可以记录一个日志  "上传" + fileinfo.FullName + "上传到" + "FTP://" + hostname + "/" + targetDir + "/" + fileinfo.Name + "成功." ); 86             ftp = null; 87  88             #region 89             /***** 90              *FtpWebResponse 91              * ****/ 92             //FtpWebResponse ftpWebResponse = (FtpWebResponse)ftp.GetResponse(); 93             #endregion 94         } 95  96         PRivate static FtpWebRequest GetRequest(string URI, string username, string password) 97         { 98             //根据服务器信息FtpWebRequest创建类的对象 99             FtpWebRequest result = (FtpWebRequest)FtpWebRequest.Create(URI);100             //提供身份验证信息101             result.Credentials = new System.Net.NetworkCredential(username, password);102             //设置请求完成之后是否保持到FTP服务器的控制连接，默认值为true103             result.KeepAlive = false;104             return result;105         }