if file.exists() doesnt work on a website ?

Question

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Hi guys,

I'm triying to check whether or not any file exists in my directory.

İf the berat.txt exists , i will show message YES, if not NO ,

The code below doesnt work.Also i tried Fileİnfo class and FileExists() method..but always false why ? permissions?

please inform me thanks for in advance

C#

string targetDirectory = @"http://www.berat.net/lisanslar";
string[] fileEntries = Directory.GetFiles(targetDirectory);
foreach (string fileName in fileEntries)
{
    if (fileName=="berat.txt")
    {
        MessageBox.Show("var");
    }
    else
    {
        MessageBox.Show("yok");
    }
}

Posted 21-Sep-12 10:00am

beratxt

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Comments

[no name] 21-Sep-12 16:06pm

What kind of a directory name is "http://www.berat.net/lisanslar"?

beratxt 21-Sep-12 16:12pm

what kind of meaning ?..it is an example domain and root..

[no name] 21-Sep-12 16:14pm

Exactly. It's a URL NOT a directory. Why do you suppose it does not work?

beratxt 21-Sep-12 16:21pm

yes i know...can u look the code below ?

FileInfo f = new FileInfo(@"http://www.ebitech.net/lisanslar/berat.txt");

if (f.Exists==true)
{
MessageBox.Show("yes exists");
}
else
{
MessageBox.Show("non exist");
}
this code also doesnt work why ?

[no name] 21-Sep-12 16:23pm

For exactly the same reason.

beratxt 21-Sep-12 16:27pm

The reason can be same..But what is the solution for it ? :) how can i check the file whether or not exists on the Server..it works on local...

[no name] 21-Sep-12 16:32pm

You would need a web service that can check the local drives on the webserver. Or you would need to check that in your code-behind. Get a list of files from an FTP server that can access the web servers files. Map the web servers drives as network drives. You are not going to be able to query a web servers files remotely like you are trying to do. Not going to happen.

2 solutions

Solution 1

Use Server.MapPath Instead of that URL

Posted 21-Sep-12 10:08am

CoderVivs

Comments

beratxt 21-Sep-12 16:12pm

in winform..not asp.net

CoderVivs 21-Sep-12 16:19pm

have u checked ur FileEntries list ? is it cntains the Filename "berat.txt" if yes then check it the case sensivity

beratxt 21-Sep-12 16:26pm

yes i tried.also i tried the code below..can u give an idea ? wrong what ?

Hi Mr.Zorgo ,

I dont want to list the files existing on the server.I just wana check if the file exists in my website..The code is like below.Above one is not true ..

yes i know...can u look the code below ?

FileInfo f = new FileInfo(@"http://www.ebitech.net/lisanslar/berat.txt");

if (f.Exists==true)
{
MessageBox.Show("yes exists");
}
else
{
MessageBox.Show("non exist");
}
this code also doesnt work why ?

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**Zoltán Zörgő** · Accepted Answer · 2012-09-21T10:13:00

Solution 2

This won't work. There is no general http wrapper for that. Why do you think, that you can list the files on a web server? They might even not exist at all, routing can present you any directory structure in the urls, that is absolutely not real, only generated. Could only work if the site you try to access is serving WebDav (Web-based Distributed Authoring and Versioning) on that virtual folder. It is a set of extensions to the HTTP protocol which allows users to collaboratively edit and manage files on remote web servers. Thus, if you have a good knowledge of this protocol, you can do the downloading job through the classes in System.Net. You can find a good starting point here: http://admiral-announce.blogspot.hu/2010/04/listing-directory-using-webdav.html[^]
But if there is no WebDav on the server, you have to try to fetch or at least test for that file as url. Try to access the @"http://www.berat.net/lisanslar/berat.txt" resource. If you get 200 OK, than you have it. You don't need to download the file itself, you can fetch only its's http headers with the HEAD method. See the answers here: http://stackoverflow.com/questions/924679/c-sharp-how-can-i-check-if-a-url-exists-is-valid[^]

Posted 21-Sep-12 10:13am

Zoltán Zörgő

Updated 21-Sep-12 10:15am

v2

Comments

beratxt 21-Sep-12 16:23pm

Hi Mr.Zorgo ,

I dont want to list the files existing on the server.I just wana check if the file exists in my website..The code is like below.Above one is not true ..

yes i know...can u look the code below ?

FileInfo f = new FileInfo(@"http://www.ebitech.net/lisanslar/berat.txt");

if (f.Exists==true)
{
MessageBox.Show("yes exists");
}
else
{
MessageBox.Show("non exist");
}
this code also doesnt work why ?

Zoltán Zörgő 21-Sep-12 16:28pm

It is not working, because this is not meant to work via http, it is designed to work on a file system. Please look at the second link I have posted. Be aware that what you try to check might not be a file - might be, but if it is on a web server it is a web resource, and you have to treat it as such.
Here are also two implementations: http://www.dotnetthoughts.net/how-to-check-remote-file-exists-using-c/

Sergey Alexandrovich Kryukov 21-Sep-12 16:31pm

Correct, a 5. OP just wanted you to say that again. :-)
--SA

beratxt 21-Sep-12 16:33pm

Thanks friends..Sorry for my knowledge!..but i was thingking it works also for http:(
sorry for making u disturb..thanks for your help!

Zoltán Zörgő 21-Sep-12 16:37pm

This is why we are here.

[no name] 21-Sep-12 17:21pm

Might be why you are here.... I'm here for the glory :-)

Sergey Alexandrovich Kryukov 21-Sep-12 17:57pm

You are already famous. :-)
--SA

[no name] 21-Sep-12 17:59pm

lol or infamous.

Sergey Alexandrovich Kryukov 21-Sep-12 18:09pm

:-), no!
--SA

Wonde Tadesse 21-Sep-12 18:31pm

5+

beratxt 22-Sep-12 5:02am

all of us are here for each other :) thanks

Wonde Tadesse 22-Sep-12 14:37pm

No prob.