Vista - Application Settings user settings storage directory

Hi All,

I was looking to use user settings to store some, well, user settings,
but right now the directory used to store changes periodically and I
haven't been able to work out what causes it.

It's storing it in a path that follows the pattern:

\Local Settings\Application Data\RHD_Research_Limited\<Application
Name>_Url_?????????\<Version>

Where the "??????" portion is what was changing and is a stream of,
seemingly, random alpha numeric data; I'm guessing it's actually a hash
of some kind.

The form looks a little odd to me; I'm not sure where the Url* portion
is coming from or why the spaces have been changed to underscores.
Normally I'd expect to see the base path look more like

\Local Settings\Application Data\RHD Research Limited\<Application Name>

The version portion I expect to change when the assembly version number
is bumped - as it does - which is fine because that's what
Properties.Settings.Default.Upgrade() is for. Problem is that doesn't
work if the application directory keeps changing as well; it can't find
the old settings to upgrade them, because they're obviously in a
different path - this is the real problem for me.

Anyone have idea what is causing the application name to get mangled the
way it is and - a little more importantly - how I can stop it? If I
can't get it to work properly I'm going to have to fall back to using
registry entries - it is a winforms app - which is no great hardship,
it's just moderately annoying.

--
Chris Crowther MBCS
C# Developer
RHD Research Ltd

Hi Chris,

As for the ApplicationSettings in .NET 2.0(for higher) application, is use
the default "LocalFileSettingsProvider" which will use randomly generated
path (in User's LocalSettings temp dir) to store "User Scope" setting
items. Here are some article which also mentioned some about the file path
of the user scope settings:

#Using My.Settings in Visual Basic 2005
http://msdn2.microsoft.com/en-us/lib...11(VS.80).aspx

#Exploring Secrets of Persistent Application Settings
http://www.devx.com/dotnet/Article/33944/1954

I've also inspected the LocalFileSettingsProvider class, it seems it use a
internal class to generate the temp file path(and will vary between
multiple updates). So far if you need a predictable path for store such
settings, I think you may consider the following options:

1. Use Application Scope instead of User Scope so that the settings will be
stored in App.config file

2. Use custom provider for your application, here is a web article
mentioned creating custom settings provider:

#Creating a Custom Settings Provider
http://www.codeproject.com/KB/vb/Cus...sProvider.aspx

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead


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--------------------

Steven Cheng [MSFT] wrote:
Looking through http://blogs.msdn.com/rprabhu/articles/433979.aspx,
linked to from the second of those URLs, it seems the url_xxxx portion
of the file path is generated from the AppDomain evidence.

Taking a look at the Evidence info in the MSDN docs and checking the
values during runtime, the Url is the location of the executable file on
the disk, which changes any time we bump the version number.
The problem with application scope is the settings will be RO - if I
understand it correctly - whereas these values need to be RW.
I shall take a look at that, thanks.
--
Chris Crowther MBCS
C# Developer
RHD Research Ltd

Thanks for your reply Chris,

Yes, currently Application scope items doesn't provide existing means to
edit it. I found someone else provide some custom approach for editing
Application Scope setting items. Here is one posted by a MS engineer:

#Changing application settings programmatically in .NET Framework 2.0
http://blogs.msdn.com/mosharaf/archi...lication-setti
ngs-programmatically-in-net-framework-2-0.aspx

Hope this also helps.

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead


Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
provided. You can send feedback directly to my manager at:
msdnmg@xxxxxx.

==================================================
Get notification to my posts through email? Please refer to
http://msdn.microsoft.com/subscripti...ult.aspx#notif
ications.

This posting is provided "AS IS" with no warranties, and confers no rights.

--------------------usegeneratedpathbe

Steven Cheng [MSFT] wrote:
I went with the custom settings provider, which seems to be working well
as a solution.

Thanks for the pointers
--
Chris Crowther MBCS
C# Developer
RHD Research Ltd

You're welcome

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead

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