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Asked: 2026-05-11T00:40:28+00:00

I have a .NET program to upload an image to a webserver. I am

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I have a .NET program to upload an image to a webserver. I am using the ASP.NET file uploading control to do it. The program works alright in my local environment but when I run it on the webserver, I get the following error:

>     System.UnauthorizedAccessException: > Access to the path > '\\fsvs02\target03\352972\352974\www.mysite.com\web\content\Images\TempStorage\tempImage.jpg' > is denied. >        at System.IO.__Error.WinIOError(Int32 > errorCode, String maybeFullPath) >        at System.IO.FileStream.Init(String path, > FileMode mode, FileAccess access, > Int32 rights, Boolean useRights, > FileShare share, Int32 bufferSize, > FileOptions options, > SECURITY_ATTRIBUTES secAttrs, String > msgPath, Boolean bFromProxy) >        at System.IO.FileStream..ctor(String > path, FileMode mode) >        at System.Web.HttpPostedFile.SaveAs(String > filename) >        at uploadimage.UploadImage()

A quick Google search confirmed that it is a permissions issue; but since it only happens intermittently, I don’t have a plan for diagnosing how to fix it.

My question is: What should I do to diagnose and fix this issue?

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1 Answer

  1. Do you upload the file to the same filename for every user (it looks from the error message that this is the case)? If so, then it’s probably as Ady says. Instead, use Path.GetTempFileName to generate a filename for your temporary file that won’t collide with one that’s already there. Make sure to move or delete the file when you’re done or else you’ll fill up the hard disk with temporary files.

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