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.NET Forum / ASP.NET / General / March 2008FileIOPermissionAccess.PathDiscovery permission needed
How can I give the logged in User FileIOPermissionAccess.PathDiscovery permission to execute a Environment.SpecialFolder.ApplicationData method ? thanks Brian, One way is to create an account that has the required permission and impersonate that user through code.  Signature-- Regards, Alvin Bruney [MVP ASP.NET] [Shameless Author plug] The O.W.C. Black Book, 2nd Edition Exclusively on www.lulu.com/owc $19.99 > How can I give the logged in User FileIOPermissionAccess.PathDiscovery > permission to execute a Environment.SpecialFolder.ApplicationData method > ? > > thanks Brian, Alvin, Do you know how I give a user FileIOPermissionAccess.PathDiscovery permission? Is it via the Group Policy editor? thanks > One way is to create an account that has the required permission and > impersonate that user through code. [quoted text clipped - 4 lines] >> >> thanks Brian, One way is to create an assembly that has an attribute that demands the fileIOPermissionAccess permission. Inside the assembly, you can create a method that does the dirty work. The downside with this is that the entire class has the permissions, if you want to restrict it to just a method, you can demand the permission thru code. There's a link with an implementation sample here: http://msdn2.microsoft.com/en-us/library/system.security.permissions.fileiopermi ssion.aspx. Read the pre-requesits VERY carefully. These are strong permissions you are asking for and there is a very real potential for you, your code, or rogue code to subvert or compromise the sub-system. Signature-- Regards, Alvin Bruney [MVP ASP.NET] [Shameless Author plug] The O.W.C. Black Book, 2nd Edition Exclusively on www.lulu.com/owc $19.99 > Alvin, > [quoted text clipped - 11 lines] >>> >>> thanks Brian, Alvin, It is the FileIOPermissionAccess.PathDiscovery permission I want to set. (I'm trying to get the value of Environment.SpecialFolder.ApplicationData) In the msdn examples we get:: FileIOPermission f2 = new FileIOPermission(FileIOPermissionAccess.Read, "C:\\test_r"); f2.AddPathList(FileIOPermissionAccess.Write | FileIOPermissionAccess.Read, "C:\\example\\out.txt"); But I cannot figure out the call to set PathDiscovery permission as it has no path?, and there appears to be no signature for it? thanks, B > One way is to create an assembly that has an attribute that demands the > fileIOPermissionAccess permission. Inside the assembly, you can create a [quoted text clipped - 22 lines] >>>> >>>> thanks Brian, Hold on, why can't you simply access the environment variable, the worker process should have rights to it. For instance, this code on a web page returns the name of my computer protected void Page_Load(object sender, EventArgs e) { Response.Write(Environment.MachineName); } Modify the code to return what you want. Signature-- Regards, Alvin Bruney [MVP ASP.NET] [Shameless Author plug] The O.W.C. Black Book, 2nd Edition Exclusively on www.lulu.com/owc $19.99 > Alvin, > [quoted text clipped - 40 lines] >>>>> >>>>> thanks Brian, I moved call to the page load, but it still did not return the env variable. Thanks for your suggestion, B > Hold on, why can't you simply access the environment variable, the worker > process should have rights to it. For instance, this code on a web page [quoted text clipped - 50 lines] >>>>>> >>>>>> thanks Brian, using System; using System.Web; public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { Response.Write(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData)); //this prints out C:\Users\vapor\AppData\Roaming //to my web page } } Signature-- Regards, Alvin Bruney [MVP ASP.NET] [Shameless Author plug] The O.W.C. Black Book, 2nd Edition Exclusively on www.lulu.com/owc $19.99 > I moved call to the page load, but it still did not return the env > variable. [quoted text clipped - 55 lines] >>>>>>> >>>>>>> thanks Brian, Alvin, Are you running as an Administrator? If so it will work. Try browsing to your web application as a "Domain User" only, this is what fails for me. Thanks, B > using System; > using System.Web; [quoted text clipped - 69 lines] >>>>>>>> >>>>>>>> thanks Brian, So if that's the case, you can use impersonation to solve the permissions issue. Signature-- Regards, Alvin Bruney [MVP ASP.NET] [Shameless Author plug] The O.W.C. Black Book, 2nd Edition Exclusively on www.lulu.com/owc $19.99 > Alvin, > [quoted text clipped - 76 lines] >>>>>>>>> >>>>>>>>> thanks Brian,
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