For my C# app, I don't want to always prompt for elevation on application start, but if they choose an output path that is UAC protected then I need to request elevation.
So, how do I check if a path is UAC protected and then how do I request elevation mid-execution?
The best way to detect if they are unable to perform an action is to attempt it and catch the UnauthorizedAccessException
.
However as @DannySmurf correctly points out you can only elevate a COM object or separate process.
There is a demonstration application within the Windows SDK Cross Technology Samples called UAC Demo. This demonstration application shows a method of executing actions with an elevated process. It also demonstrates how to find out if a user is currently an administrator.
Requesting elevation mid-execution requires that you either:
In .NET, there is currently no way to elevate a running process; you have to do one of the hackery things above, but all that does is give the user the appearance that the current process is being elevated.
The only way I can think of to check if a path is UAC elevated is to try to do some trivial write to it while you're in an un-elevated state, catch the exception, elevate and try again.
I'm not sure if it is of any help for you but you can take a look at this blog post:
http://haishibai.blogspot.com/2010/01/tiy-try-out-windows-7-uac-using-c-part_26.html
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