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.NET Forum / Languages / C# / March 2008UnauthorizedAccessException
Hello, Until recently, I had been developing on an XP machine. Updated to Vista as the development environment and now when I try to access a file that I need to load I get an UnauthorizedAccessException Pardon, my ignorance but what is different in Vista security wise that would prevent me from accessing a file? I am the only user of this PC and have admin privliges. It doesn't seem to matter where the file is located - either in my current "users" subfolder or in a "public" subfolder. And I have made sure the "read-only" attribute isn't set. Thanks in advance. > Hello, > [quoted text clipped - 10 lines] > subfolder. > And I have made sure the "read-only" attribute isn't set. I take it that you don't know about Run As Administrator means on Vista. In some cases, even an account with Admin rights on Vista is locked down to Standard user rights and rights of the Admin must its privileges escalated when doing things or running programs on Vista. You have to start the VS 2005 or whatever you're using with Run As Administrator, which can be set on and exe or a short-cut pointing to the exe. <http://technet2.microsoft.com/WindowsVista/en/library/0d75f774-8514-4c9e-ac08-4c 21f5c6c2d91033.mspx?mfr=true> <http://www.devx.com/VistaSpecialReport/Article/33856/1954?pf=true> And sometimes on Vista you have to take account ownership of a file too. Thank you for your reply. I did set my VS to run as Admin and still have the same issue. This is quite frustrating. I can open and use my simple text file I'm trying to load in notepad. Eric >> Hello, >> [quoted text clipped - 23 lines] > > And sometimes on Vista you have to take account ownership of a file too. *Exactly* where are you reading the file from? Vista is very particular about this sort of thing. You should be able to read files from the current user's MyDocuments, and down in his LocalSettings. For example, we are reading and writing data to a file in a folder we create inside Environment.SpecialFolder.LocalApplicationData. On Vista, that would be C:\Users\username\AppData\Local\ourfolder\ In XP, that would be C:\Documents And Settings\username\Local Settings\Application Data\ourfolder\ Do you have control over where you put the file? RobinS. GoldMail.com > Hello, > [quoted text clipped - 12 lines] > > Thanks in advance. Thank you for a response. I have tried reading the file from: C:\Users\username\documents.... as well as C:\Users\public.... The file is a simple text file and I can open it using Notepad. I really don't understand why I can't access it from my application. Eric > *Exactly* where are you reading the file from? > [quoted text clipped - 31 lines] >> >> Thanks in advance. What's the exact exception message thrown on you? Are you sure you are writing to the home path? Did you inspect the eventlog to see who's accessing the file and why it's failing? Did you upgrade from XP, or is this a fresh install? Willy. > Thank you for a response. > [quoted text clipped - 45 lines] >>> >>> Thanks in advance. One other possibility I thought of is the application I'm writing isn't loading the file but another component is that is located in DLL. Do I have to provide permision for the DLL to access this file? I checked the permisions for this DLL and it appears my settings are such to provide "full control" Thanks again > Hello, > [quoted text clipped - 12 lines] > > Thanks in advance. I found out what was wrong. Code works as expected. The user is the one doing things wrong. Thanks for all the feedback. Much appreciated. > Hello, > [quoted text clipped - 12 lines] > > Thanks in advance. Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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