C＃FTP和Windows服务 [英] C# FTP and windows services

问题描述

你好



我想在C＃上做服务，在FTP上用我的服务下载文件



我的代码：

  public   string  [] directoryListSimple（ITEM Line， string 目录）
 {
  try  
 {
  / *  创建FTP请求* /  
 ftpRequest = （FtpWebRequest）WebRequest.Create（host +   / +目录）; 
  / *  使用提供的用户名和密码登录FTP服务器* /  
 ftpRequest.Credentials =  new  NetworkCredential（user，pass）; 
 ftpRequest.UseBinary =  true ; 
 ftpRequest.UsePassive =  false ; 
 ftpRequest.KeepAlive =  true ; 
  / *  指定FTP请求的类型* /  
 ftpRequest.Method = WebRequestMethods.Ftp.ListDirectory; 
  / *  建立与FTP服务器的返回通信* /  
 ftpResponse =（ FtpWebResponse）ftpRequest.GetResponse（）; 
  / *  建立与FTP服务器的返回通信* /  
 ftpStream = ftpResponse .GetResponseStream（）; 
  / *  获取FTP服务器的响应流* /  
 StreamReader ftpReader = < span class =code-keyword> new  StreamReader（ftpStream）; 
  / *  存储原始响应* /  
  string  directoryRaw =  null ; 
  / *  读取响应的每一行并为每条线附加管道以便于解析* /  
 尝试 
 {
  while （ftpReader.Peek（ ）！= -1）
 {
 directoryRaw + = ftpReader.ReadLine（）+   | ; 
} 
} 
  catch （例外情况）
 {
 Line.ERROR =   TRUE; 
 CL_TRAVAIL.Instance.LOG（  ERROR 2 = + ex.ToString（）） ; 
} 
 ftpReader.Close（）; 
 ftpStream.Close（）; 
 ftpResponse.Close（）; 
 ftpRequest =  null ; 
 
  / *  资源清理* /  
  / *  将目录列表作为字符串返回，通过使用您附加的分隔符解析'directoryRaw'（我在本例中使用|）* /  
 尝试 
 {
  string  [] directoryList = directoryRaw.Split（  | .ToCharArray（））; 
 Line.ERROR =   FASLE; 
  return  directoryList; 
} 
  catch （例外情况）
 {
 Line.ERROR =   TRUE; 
 CL_TRAVAIL.Instance.LOG（  ERROR 2 = + ex.ToString（）） ; 
} 
  / *  如果发生异常，则返回空字符串数组* /  
  return   new   string  [ ] { }; 
} 
  catch （例外情况）
 {
 Line.ERROR =   TRUE; 
 CL_TRAVAIL.Instance.LOG（  ERROR 3 = + ex.ToString（）） ; 
  return   new   string  [ ] { }; 
} 
 
} 

我的错误在这一行：ftpResponse =（FtpWebResponse）ftpRequest .GetResponse（）;

< pre> 
 10:40:29  -  ERROR 3 = System.Net.WebException：La connexion sous-jacenteaétéfermée：Une erreur inattendue s'est produite lors delaréception。 $ b $bàSystem.Net.FtpWebRequest.CheckError（）$ b $bàSystem.Net.FtpWebRequest.SyncRequestCallback（Object obj）$ b $bàSystem.Net.CommandStream.Abort（Exception e）
 àSystem.Net.CommandStream.CheckContinuePipeline（）$ b $bàSystem.Net.FtpDataStream.System.Net.ICloseEx.CloseEx（CloseExState closeState）$ b $bàSystem.Net.FtpDataStream.Dispose（布尔处理）$ b $bàSystem.IO.Stream.Close（）$ b $bàSystem.IO.StreamReader.Dispose（布尔处理）$ b $bàWindowsService.FTP.directoryListSimple（ITEM Line，String directory）

我的尝试：



您好



我在Windows窗体应用程序中使用我的代码并且它可以工作，但是当我在我的服务应用程序中使用它时它不起作用。



有人有个主意



谢谢

解决方案

< blockquote>尝试将 ftpwebrequest.timeout 值设置为-1（无限制） ）。 MS文档说它设置为，但它实际上设置为100000（100秒）。

我使用它并且它的工作我不知道为什么???

 public List< string> directoryListSimple（ITEM Line，string directory）
 {
 
 List< string> directoryList = new List< string>（）; 
 
 FtpWebRequest request =（FtpWebRequest）WebRequest.Create（host +/+ directory）; 
 request.Method = WebRequestMethods.Ftp.ListDirectory; 
 
 //此示例假定FTP站点使用匿名登录。 
 request.Credentials = new NetworkCredential（user，pass）; 
 FtpWebResponse response =（FtpWebResponse）request.GetResponse（）; 
流responseStream = response.GetResponseStream（）; 
 StreamReader reader = new StreamReader（responseStream）; 
 //Console.WriteLine（reader.ReadToEnd（））; 
 
 while（！reader.EndOfStream）
 {
 directoryList.Add（reader.ReadLine（））; 
} 
 Console.WriteLine（目录列表完成，状态{0}，response.StatusDescription）; 
 
 reader.Close（）; 
 responseStream.Close（）; 
 response.Close（）; 
 request = null; 
 reader = null; 
 responseStream = null; 
 response = null; 
 
返回directoryList; 
} 

与我合作的解决方案

尝试
 {
 
 FtpWebRequest ftpReq =（FtpWebRequest）WebRequest.Create（host +/+ remoteFile）; 
 ftpReq.UseBinary = true; 
 ftpReq.Method = WebRequestMethods.Ftp.UploadFile; 
 ftpReq.Credentials = new NetworkCredential（user，pass）; 
 
 byte [] b = File.ReadAllBytes（localFile）; 
 
 ftpReq.ContentLength = b.Length; 
 using（Stream s = ftpReq.GetRequestStream（））
 {
 s.Write（b，0，b.Length）; 
} 
 
 FtpWebResponse ftpResp =（FtpWebResponse）ftpReq.GetResponse（）; 
 
 if（ftpResp！= null）
 {
 OUTILS.LOG（MSG FTP =+ ftpResp.StatusDescription.ToString（））; 
} 
} 
 catch（例外e）
 {
 OUTILS.LOG（ERROR START）; 
 OUTILS.LOG（MSG =+ e.ToString（））; 
 OUTILS.LOG（ERROR END）; 
} 

Hello

I want to do a service in C# and my service download file on a FTP

My code :

public string[] directoryListSimple(ITEM Line, string directory)
        {
            try
            {
                /* Create an FTP Request */
                ftpRequest = (FtpWebRequest)WebRequest.Create(host + "/" + directory);
                /* Log in to the FTP Server with the User Name and Password Provided */
                ftpRequest.Credentials = new NetworkCredential(user, pass);
                ftpRequest.UseBinary = true;
                ftpRequest.UsePassive = false;
                ftpRequest.KeepAlive = true;
                /* Specify the Type of FTP Request */
                ftpRequest.Method = WebRequestMethods.Ftp.ListDirectory;
                /* Establish Return Communication with the FTP Server */
                ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
                /* Establish Return Communication with the FTP Server */
                ftpStream = ftpResponse.GetResponseStream();
                /* Get the FTP Server's Response Stream */
                StreamReader ftpReader = new StreamReader(ftpStream);
                /* Store the Raw Response */
                string directoryRaw = null;
                /* Read Each Line of the Response and Append a Pipe to Each Line for Easy Parsing */
                try
                {
                    while (ftpReader.Peek() != -1)
                    {
                        directoryRaw += ftpReader.ReadLine() + "|";
                    }
                }
                catch (Exception ex)
                {
                    Line.ERROR = "TRUE";
                    CL_TRAVAIL.Instance.LOG("ERROR 2 = " + ex.ToString());
                }
                ftpReader.Close();
                ftpStream.Close();
                ftpResponse.Close();
                ftpRequest = null;

                /* Resource Cleanup */
                /* Return the Directory Listing as a string Array by Parsing 'directoryRaw' with the Delimiter you Append (I use | in This Example) */
                try
                {
                    string[] directoryList = directoryRaw.Split("|".ToCharArray());
                    Line.ERROR = "FASLE";
                    return directoryList;
                }
                catch (Exception ex)
                {
                    Line.ERROR = "TRUE";
                    CL_TRAVAIL.Instance.LOG("ERROR 2 = " + ex.ToString());
                }
                /* Return an Empty string Array if an Exception Occurs */
                return new string[] { "" };
            }
            catch (Exception ex)
            {
                Line.ERROR = "TRUE";
                CL_TRAVAIL.Instance.LOG("ERROR 3 = " + ex.ToString());
                return new string[] { "" };
            }

        }

My error is at this line : ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();

<pre>
10:40:29 - ERROR 3 = System.Net.WebException: La connexion sous-jacente a été fermée : Une erreur inattendue s'est produite lors de la réception.
   à System.Net.FtpWebRequest.CheckError()
   à System.Net.FtpWebRequest.SyncRequestCallback(Object obj)
   à System.Net.CommandStream.Abort(Exception e)
   à System.Net.CommandStream.CheckContinuePipeline()
   à System.Net.FtpDataStream.System.Net.ICloseEx.CloseEx(CloseExState closeState)
   à System.Net.FtpDataStream.Dispose(Boolean disposing)
   à System.IO.Stream.Close()
   à System.IO.StreamReader.Dispose(Boolean disposing)
   à WindowsService.FTP.directoryListSimple(ITEM Line, String directory)

What I have tried:

Hello

I use my code in windows form application and it work, but when i use it in my service application it does not work.

Somebody have an idea

Thank you

解决方案

Try setting the ftpwebrequest.timeout value to -1 (unlimited). The MS docs say it's set to that, but it's actually set to 100000 (100 seconds).

I use this and it's work i don't undurstand why???

public List<string> directoryListSimple(ITEM Line, string directory)
        {

            List<string> directoryList = new List<string>();

            FtpWebRequest request = (FtpWebRequest)WebRequest.Create(host + "/" + directory);
            request.Method = WebRequestMethods.Ftp.ListDirectory;

            // This example assumes the FTP site uses anonymous logon.  
            request.Credentials = new NetworkCredential(user, pass);
            FtpWebResponse response = (FtpWebResponse)request.GetResponse();
            Stream responseStream = response.GetResponseStream();
            StreamReader reader = new StreamReader(responseStream);
            //Console.WriteLine(reader.ReadToEnd());

            while (!reader.EndOfStream)
            {
                directoryList.Add(reader.ReadLine());
            }
            Console.WriteLine("Directory List Complete, status {0}", response.StatusDescription);

            reader.Close();
            responseStream.Close();
            response.Close();
            request = null;
            reader=null;
            responseStream=null;
            response = null;
            
            return directoryList;
        }

the soluce working with me

try
            {

                FtpWebRequest ftpReq = (FtpWebRequest)WebRequest.Create(host + "/" + remoteFile);
                ftpReq.UseBinary = true;
                ftpReq.Method = WebRequestMethods.Ftp.UploadFile;
                ftpReq.Credentials = new NetworkCredential(user, pass);

                byte[] b = File.ReadAllBytes(localFile);

                ftpReq.ContentLength = b.Length;
                using (Stream s = ftpReq.GetRequestStream())
                {
                    s.Write(b, 0, b.Length);
                }

                FtpWebResponse ftpResp = (FtpWebResponse)ftpReq.GetResponse();

                if (ftpResp != null)
                {
                    OUTILS.LOG("MSG FTP= " + ftpResp.StatusDescription.ToString());
                }
            }
            catch (Exception e)
            {
                OUTILS.LOG("ERROR START");
                OUTILS.LOG("MSG = " + e.ToString());
                OUTILS.LOG("ERROR END");
            }

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