I need to restart the "Windows Audio Service" (audiosrv) via C#. I'm
using the ServiceController Class to do this.
It is no problem under XP and no problem under vista if UAC is
disabled.
But with enabled UAC i'm getting a "access refused" exception.
I also tried to do it via console with "net start ..." but the same
error appears.
Three questions:
1. Is it possible to restart the "windows audio service" if UAC is
enabled ?
2. Why does the exception occur? If I do some other stuff, e.g.
starting regedit via Process.Start() the user gets asked if he really
wants that. I would expect the same behaviour for restarting
services.
3. If it's not possible at all: Can I find out programmatically
whether UAC is enabled?
Thanks and excuse my bad english!
Yes when running as full "Administrator". That is start the console (cmd interpreter) by
right clicking "Run as Administrator".
> 2. Why does the exception occur? If I do some other stuff, e.g.
> starting regedit via Process.Start() the user gets asked if he really
> wants that. I would expect the same behaviour for restarting
> services.
The exception occurs because you are running as a standard user, only admins can start, stop
... services.
If you want the same behavior you'll have to insert a "manifest" in your executable file.
<?xml version="1.0" encoding="utf-8" ?>
<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
<assemblyIdentity version="1.0.0.0"
processorArchitecture="X86"
name="someExecName"
type="win32" />
<description>Program description</description>
<trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
<security>
<requestedPrivileges>
<requestedExecutionLevel level="requireAdministrator" />
</requestedPrivileges>
</security>
</trustInfo>
</assembly>
To add above manifest to the executable assembly, you have to run mt.exe like this;
mt -manifest somename.exe.manifest -outputresource:somename.exe;#1
PS change the someExecName and Program description to suit your needs...
> 3. If it's not possible at all: Can I find out programmatically
> whether UAC is enabled?
See above.
Willy.
To further clarify:
save the above manifest in a file called "some.exe.manifest", where someApp is the name of
your executable file.
Say you have "audioCntrl.exe", then you could name your manifest audioCntrl.exe.manifest"
and run mt.exe like:
mt -manifest audioCntrl.exe.manifest -outputresource:audioCntrl.exe;#1
Willy.
PS. type mt /help from the command line for more detailed help on mt.
I will try that manifest stuff on friday and will let you know if it
worked for me...