如何解决c＃.net windows服务中的操作超时问题？

问题描述

你好，



如何解决c＃.net windows服务中的操作超时问题？



我正在编写此代码： -

Hello,

How to resolve operation timed out problem in c# .net windows service?

I am writing this code:-

private void DownloadFile(string file)
       {

 FTPSettings.IP = "abc.com/xyz";
                FTPSettings.UserID = "xxxxx";
                FTPSettings.Password = "xxxxx";
                string uri = "ftp://" + FTPSettings.IP + "/" + "Testing" + "/" + file;
                Uri serverUri = new Uri(uri);
                if (serverUri.Scheme != Uri.UriSchemeFtp)
                {
                    return;
                }
                FtpWebRequest reqFTP;
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + FTPSettings.IP + "/" + "Testing" + "/" + file));
                reqFTP.Credentials = new NetworkCredential(FTPSettings.UserID, FTPSettings.Password);
                reqFTP.KeepAlive = false;
                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
                reqFTP.UseBinary = true;
                reqFTP.Proxy = null;
                reqFTP.UsePassive = false;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream responseStream = response.GetResponseStream();
                FileStream writeStream = new FileStream(@"D:\ABC\XYZ\bin\" + file, FileMode.Create);

                int Length = 2048;
                Byte[] buffer = new Byte[Length];
                int bytesRead = responseStream.Read(buffer, 0, Length);
                while (bytesRead > 0)
                {
                    writeStream.Write(buffer, 0, bytesRead);
                    bytesRead = responseStream.Read(buffer, 0, Length);
                }
                writeStream.Close();
                response.Close();
}

我收到错误操作已经超时。



请帮助我。



先谢谢。



Ankit Agarwal

软件工程师

My is getting error "Operation has timed out.

Please help me.

Thanks in Advance.

Ankit Agarwal
Software Engineer

推荐答案

// ********************************************* download_file

/// <summary>
/// uses FTP to down load a file from a web location to a
/// local file
///
/// following discussions are based on
///
///     www.host.domain/path/file.ext
///
/// </summary>
/// <param name="host">
/// host server; in the above "www.server.domain"
/// </param>
/// <param name="path">
/// path within the host; in the above "path"
/// </param>
/// <param name="filename">
/// full file name, including extension, if applicable; in the
/// above "file.ext"
/// </param>
/// <param name="user_name">
/// username of user making request; if the request is
/// anonymous, supply either "anonymous" or a null or empty
/// string
/// </param>
/// <param name="password">
/// password of the user making the request; if the request is
/// anonymous, supply the email address of the user making the
/// request
/// </param>
/// <param name="target_path">
/// supply the fully qualified name of the target location on
/// the local machine; insure the location is writeable
/// </param>
void download_file ( string  host,
                     string  path,
                     string  filename,
                     string  user_name,
                     string  password,
                     string  target_path )
    {

    StringBuilder   sb = new StringBuilder ( );

    sb.Append ( "ftp://" );
    sb.Append ( host );
    sb.Append ( "/" );
    sb.Append ( path );
    sb.Append ( "/" );
    sb.Append ( filename );

    try
        {
        FtpWebRequest  request;

        request = ( FtpWebRequest ) WebRequest.Create (
                                        sb.ToString ( ) );
        request.Method = WebRequestMethods.Ftp.DownloadFile;

        if ( String.IsNullOrEmpty ( user_name ) )
            {
            user_name = "anonymous";
            }
        request.Credentials = new NetworkCredential (
                                                user_name,
                                                password );

        using ( FtpWebResponse  response =
                        ( FtpWebResponse ) request.
                                           GetResponse ( ) )
            {
            using ( Stream rs = response.
                                GetResponseStream ( ) )
                {
                using ( StreamReader sr =
                                     new StreamReader ( rs ) )
                    {
                    File.WriteAllText ( target_path,
                                        sr.ReadToEnd ( ) );
                    }
                }
            MessageBox.Show (
                String.Format (
                    "Download Complete {0}status{0}{1}",
                    Environment.NewLine,
                    response.StatusDescription ) );
            }
        }
    catch ( Exception ex )
        {
        MessageBox.Show (
            String.Format (
                "Download Failed{0}{1}{2}",
                Environment.NewLine,
                ex.Message,
                ex.StackTrace ) );
        }
    }

用法是：

The Usings were:

using System;
using System.IO;
using System.Net;
using System.Text;
using System.Windows.Forms;

希望有所帮助。

Hope that helps.

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