Question

I’m hosting a web site at localhost and need to upload image file to another server named ImageServer with the FileUploadControl.

if (FileUploadControl.HasFile)
    {
        try
        {
            string filename = Path.GetFileName(FileUploadControl.FileName);
            FileUploadControl.SaveAs(@"\\ImageServer\" + filename);
        }
        catch (Exception ex)
        {
            throw;
        }
    }

But i hit this permission error as soon as i try to submit an image.

Exception Details: System.UnauthorizedAccessException: Access to the path ‘\ImageServer\xxx.jpg’ is denied.

ASP.NET is not authorized to access the requested resource. Consider
granting access rights to the resource to the ASP.NET request
identity. ASP.NET has a base process identity (typically
{MACHINE}\ASPNET on IIS 5 or Network Service on IIS 6) that is used if
the application is not impersonating. If the application is
impersonating via , the identity will be
the anonymous user (typically IUSR_MACHINENAME) or the authenticated
request user. To grant ASP.NET access to a file, right-click the file
in Explorer, choose “Properties” and select the Security tab. Click
“Add” to add the appropriate user or group. Highlight the ASP.NET
account, and check the boxes for the desired access.

I looked into the folder security tab, and Network Service, IUSR, IIS AppPool\Image, and Everyone are granted full control. What else could be missing? I’m not sure what permission should i give to the image folder on ImageServer to let my localhost writing files to them.

P/S: Both server using IIS 7.5

Manually copy files to \\ImageServer\ via windows explorer works though

Answer 1

The main trick is to create a virtual dir which points at \\ImageServer\.

I found an article here. Although is about IIS 6 I think it won’t be a problem to work on IIS 7 also.