FtpWebResponse实现ftp文件上传碰到的小问题

FtpWebRequest上传文件报550错误
按照一般的思路做两件事情
1.防火墙的设置，验证没有问题
2.权限设计,ftp的上传权限也没有问题

 public string Put()
        {
            try
            {
                //
                //  打开上传文件
                //
                FileStream sourceStream = new FileStream(m_Filename, FileMode.Open);

                FileInfo fileInf = new FileInfo(m_Filename);

                //
                //  绑定Url 例如: ftp://host/path
                //
                UriBuilder ftpUri = new UriBuilder("ftp", m_Host);
                if ((m_Destination == null) || (m_Destination.Length == 0))
                {
                    ftpUri.Path = m_Filename;
                }
                else
                {
                    ftpUri.Path = m_Destination + "/" + fileInf.Name;
                }

                //
                //  创建ftp连接
                //
                m_Ftp = (FtpWebRequest)WebRequest.Create(ftpUri.Uri);
                m_Ftp.Method = WebRequestMethods.Ftp.UploadFile;
                m_Ftp.UseBinary = m_UseBinary;
                m_Ftp.UsePassive = m_UsePassive;
                m_Ftp.Credentials = new NetworkCredential(m_Username, m_Password);
                FtpWebResponse response = (FtpWebResponse)m_Ftp.GetResponse();
                Console.WriteLine(response.BannerMessage);

                ftpstring.AppendLine(response.BannerMessage);
                Stream ftpStream = m_Ftp.GetRequestStream();

                //
                //  读数据并写入FtpStream
                //
                int bufferSize = 8192;
                int readCount;
                byte[] buffer = new byte[bufferSize];

                readCount = sourceStream.Read(buffer, 0, bufferSize);
                while (readCount > 0)
                {
                    ftpStream.Write(buffer, 0, readCount);
                    readCount = sourceStream.Read(buffer, 0, bufferSize);
                }

                //
                //  关闭FtpStream
                //
                sourceStream.Close();
                ftpStream.Close();

                //
                //  得到最终ftp结果
                //
                Console.WriteLine(response.StatusDescription);

                ftpstring.AppendLine(response.StatusDescription);

                response.Close();

                return ftpstring.ToString();

            }
            catch (Exception ex)
            {
                Console.WriteLine("Exception during FtpPut Activity{0}{1}",
                    Environment.NewLine,
                    ex);
                ftpstring.AppendLine("发送错误" + Environment.NewLine+ex.Message);

                return ftpstring.ToString();
            }
        }

后来在微软的中文社区看到了如下代码

         

 FileInfo fileInf = new FileInfo(filename);
          string uri = "ftp://" + m_Host + "/" + m_Destination + "/" + fileInf.Name;
          FtpWebRequest reqFTP;
            
          // Create FtpWebRequest object from the Uri provided
          reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(
                    "ftp://" + m_Host + "/" + m_Destination + "/" + fileInf.Name));

          // Provide the WebPermission Credintials
          reqFTP.Credentials = new NetworkCredential(m_Username, 
                                                     m_Password);
            
          // By default KeepAlive is true, where the control connection is 
          // not closed after a command is executed.
          reqFTP.KeepAlive = false;

          // Specify the command to be executed.
          reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
            
          // Specify the data transfer type.
          reqFTP.UseBinary = true;

          // Notify the server about the size of the uploaded file
          reqFTP.ContentLength = fileInf.Length;

          // The buffer size is set to 2kb
          int buffLength = 2048;
          byte[] buff = new byte[buffLength];
          int contentLen;
            
          // Opens a file stream (System.IO.FileStream) to read the file to be uploaded
          FileStream fs = fileInf.OpenRead();
           
          try
          {
                // Stream to which the file to be upload is written
                Stream strm = reqFTP.GetRequestStream();
                
                // Read from the file stream 2kb at a time
                contentLen = fs.Read(buff, 0, buffLength);
                
                // Till Stream content ends
                while (contentLen != 0)
                {
                    // Write Content from the file stream to the 
                    // FTP Upload Stream
                    strm.Write(buff, 0, contentLen);
                    contentLen = fs.Read(buff, 0, buffLength);
                }
                
                // Close the file stream and the Request Stream
                strm.Close();
                fs.Close();
          }
          catch(Exception ex)
            {
                 Console.WriteLine(ex.Message, "Upload Error");
            }
        } 

想了一下终于明白了，原来FTP的目标路径要加入文件，想想也是，不然怎么建立文件流呢？
这段代码改成这样，哈哈ok了。
 

if ((m_Destination == null) || (m_Destination.Length == 0))
                {
                    ftpUri.Path = m_Filename;
                }
                else
                {
                    ftpUri.Path = m_Destination + "/" + fileInf.Name;
                }