Hi all,
In my VB 2005 project I create a setting called UpgradeRequired with a
default value of True, and I include the following code that runs when the
project is launched:
If My.Settings.Upg radeRequired Then
My.Settings.Upg rade()
My.Settings.Upg radeRequired = False
My.Settings.Sav e()
End If
This code should allow a user to run one version of my app which saves
settings, then run a newer version of the app and automatically have the
saved settings applied to the newer version of the app. But (as you guessed
by the fact that I'm posting this question) it's not working. When I run
the newer version of my app I just get the default values for all of the
settings.
To try to get to the bottom of this, I need to understand what magic
My.Settings.Upg rade uses to determine if there was a previous version of the
app settings. I notice that the persistence mechanism creates a user.config
file in a new application folder for each new version of my app:
My Profile
Application Data
My Company
MyApplication.e xe_Url_abcdefg
1.0.0.0
MyApplication.e xe_Url_hijklmn
1.1.0.0
However, when I create simple test program that does the same thing, and
just change the file and assembly version numbers between runs, it puts both
"version" folders under the same application folder:
My Profile
Application Data
My Company
MyApplication.e xe_Url_gibberis h
1.0.0.0
1.1.0.0
So, something that I am doing when I build and install my application in a
production environment is causing the My.Settings magic to think that what
newer versions of my application are a totally different application.
My application consists of a main program and a bunch of strong name signed
DLLs, all of which share the same assembly and file version strings. Each
time I create a new version of my application I create a new, higher version
number and rebuild the whole kit and caboodle with that new version number
baked into all of the assemblies.
One other thing I'm doing is this: Each of the DLLs has its own user-scoped
settings (maintained in the magic My Project -Settings designer). This
seems to work as expected; each assembly "sees" its own settings via
My.Settings.<Se ttingName>, and all of the settings are persisted in separate
sections of the user.config file.
TIA - Bob
3  6810 
It turns out that there is one more crucial point that I didn't think of:
Each new release of my app is installed into a different folder! (We have a
requirement to be able to have multiple versions of the app installed
side-by-side.) So, the My.Settings magic probably considers each new
release a different app because it comes from a different location.
That leaves me with the question of how to tell My.Settings that it should
consider any version of my app to be the same app even if its location has
changed. Is that possible?
TIA - Bob
Thanks Hongye, signing my application solved my problem!
Bob
You are welcome, Bob. I am glad that my suggestion helps you.
Have a nice day.
Regards,
Hongye Sun (ho*****@online .microsoft.com, remove 'online.')
Microsoft Online Community Support
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: ms****@microsof t.com.
*
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