I can't access a folder on server

Question

I am trying to access a folder on server to get the files in it.

foreach (string filename in Directory.GetFiles(System.Web.HttpContext.Current.Server.MapPath(@"\\108.163.190.98:3306\home\mybizscard\Ads\")))
{
    list.Add(filename);
}

but I get this exception:

An unhandled exception of type 'System.NullReferenceException' occurred in WindowsFormsApplication1.exe

Additional information: Object reference not set to an instance of an object.

what is the problem ?? and how can I solve it ?

Can you say what `object`is null and throws the exception? – Sybren Jun 17 '15 at 10:49 — Sybren, Jun 17 '15 at 10:49
Is your `List` initialized with `List list = new List();`? – Chris Schubert Jun 17 '15 at 10:52 — Chris Schubert, Jun 17 '15 at 10:52

score 0 · Answer 1 · answered Jun 17 '15 at 11:03

0

Are you sure you are giving right path I think it should be

foreach (string filename in Directory.GetFiles(System.Web.HttpContext.Current.Server.MapPath(@"\\108.163.190.98\home\mybizscard\Ads\")))
            {
                list.Add(filename);
            }

answered Jun 17 '15 at 11:03

Dev D

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1
13

@Maya - Did you find your answer?? – Dev D Jun 17 '15 at 11:46

score 0 · Answer 2 · answered Jun 17 '15 at 11:05

Seems you did not initialize your string array.

var files = new string[];
files = Directory.GetFiles(System.Web.HttpContext.Current.Server.MapPath(@"\\108.163.190.98:3306\home\mybizscard\Ads\"));
foreach (string filename in files)
            {
                list.Add(filename);
            }

score 0 · Answer 3 · answered Jun 17 '15 at 11:06

First of all, MapPath doesn't do what you think it does. It is used within ASP.NET applications to map a relative path to the web root (get an absolute path for the relative path).

From the documentation:

Returns the physical file path that corresponds to the specified virtual path on the Web server.

You can not use it within a desktop application. The question is why you want to do that anyway? A UNC path can already be used like any other path (it may not contain a port, however):

foreach (string filename in Directory.GetFiles(@"\\108.163.190.98\home\mybizscard\Ads\")))
{
    list.Add(filename);
}

That is: If the user running the application as the required rights on that folder.

I can't access a folder on server

3 Answers3