How to detect if a file downloaded by FTP is completed?

Question

0.00/5 (No votes)

See more:

Hello,

I'm using a simple program that identifies changes in files in a certain folder specified by the user.
When I download a file through FTP, 2 files are created (one with final name (ex: .iso) and other .part) and two new file events are triggered. Is there any method to know when the downloaded file is completed?

Regards,
Pedro

Posted 4-Mar-14 8:03am

pedro-gon

Add a Solution

Comments

Sergey Alexandrovich Kryukov 4-Mar-14 14:24pm

It depends on how you download it. If you do it synchronously, the operation just blocks the calling thread until the operation is complete/failed. I would recommend using it this way, but in a separate thread (unless this is a simple console application).
If you have further concerns, show some code sample.
—SA

3 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Krunal Rohit · Answer 1 · 2014-03-04T08:25:00

See the very last line of the code i.e Console.WriteLine().

C#

using System;
using System.IO;
using System.Net;
using System.Text;

namespace Examples.System.Net
{
    public class WebRequestGetExample
    {
        public static void Main ()
        {
            // Get the object used to communicate with the server.
            FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://www.contoso.com/test.htm");
            request.Method = WebRequestMethods.Ftp.DownloadFile;

            // This example assumes the FTP site uses anonymous logon.
            request.Credentials = new NetworkCredential ("anonymous","janeDoe@contoso.com");

            FtpWebResponse response = (FtpWebResponse)request.GetResponse();
    
            Stream responseStream = response.GetResponseStream();
            StreamReader reader = new StreamReader(responseStream);
            Console.WriteLine(reader.ReadToEnd());

            Console.WriteLine("Download Complete, status {0}", response.StatusDescription);
    
            reader.Close();
            response.Close();  
        }
    }
}

From MSDN[^]

-KR

Dave Kreskowiak · Answer 2 · 2014-03-04T10:01:00

If you're talking about an external FTP app that you're using, seperate from your own code, no there is no way to determine when that file download is complete.

You can, however, just try to open the file, denying shared access to other applications. When you can finally open the file, the FTP download is done. Until then, the download is still going on.

george4986 · Answer 3 · 2014-03-04T17:34:00

you can verify ur file completely downloaded by checking downloaded file size with ftp file size

for getting ftp file size use below function

C#

public static long FileSize(string FTPFullFileName, string UserName, string Password)
       {
           try
           {

               FtpWebRequest FTP = (FtpWebRequest)FtpWebRequest.Create(FTPFullFileName);
               FTP.Method = WebRequestMethods.Ftp.GetFileSize;
               FTP.UseBinary = true;
               FTP.Credentials = new NetworkCredential(UserName, Password);
               FtpWebResponse Response = (FtpWebResponse)FTP.GetResponse();
               Stream FtpStream = Response.GetResponseStream();
               long FileSize = Response.ContentLength;

               FtpStream.Close();
               Response.Close();
               return FileSize;
           }
           catch (Exception ex)
           {
               throw new Exception(ex.Message);
           }
       }

calling above function

C#

string ftpFileSize =Convert.ToString(FileSize(FTPFullFileName, UserName, Password)) ;

fetching downloaded file size using fileinfo

C#

string localFileSize=string.Empty;
  FileInfo info = new FileInfo("downloaded file path+filename");
    if (info.Exists)
     {
             localFileSize = info.Length.ToString();
     }

if localFileSize equals ftpFileSize ,ur download is complete

u have to make sure localFileSize & ftpFileSize are in same units else convert them to same unit

gud luck ;-)

How to detect if a file downloaded by FTP is completed?

3 solutions

Solution 1

Solution 2

Solution 3

Add your solution here

Preview 0