tags:

views:

218

answers:

3
+1  Q: 

ClickOnce deletes my local database when it updates.. how not to?

I'm using ClickOnce to deploy my application. When the app runs the first time, if a db doesn't exist, it creates one.

Problem is, when I update, it removes the local database. Is there a way to tell it to ignore it?

+2  A: 

I imagine you're putting it in the applications directory... don't!

Put it in Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData or Environment.SpecialFolder.LocalApplicationData).

Philip Wallace  2009-11-06 21:10:24
Are there any security concerns I need to take into account? Does the app by default have access to write to files outside the application folder?
Chu  2009-11-06 21:14:53
By default, an application can write to ApplicationData and LocalApplicationData. Obviously, an admin or user can change the permissions on these folders at any time - but I think it is a "safe" assumption that you can write there.
Philip Wallace  2009-11-06 21:26:41
+2  A: 

Don't include the database in the deployment. Implement your own db creation (using script) when the database isn't present.

rdkleine  2009-11-06 21:11:05
I already am - it's not part of deployment, yet it gets removed if an update occurs.
Chu  2009-11-06 21:15:27
+1. Good answer.. And be sure to put it in a place where it will be accessible, such as Environment.SpecialFolder.ApplicationData as answered by @Phillip
David Stratton  2009-11-06 21:16:38
A: 

In the project's Publish options, under Application Files, is the database file's Publish status set to Data File?

CodeByMoonlight  2009-11-06 21:12:07
The database file is actually accessed by a class project, so it doesn't show up in the Application Files area of the publish options.
Chu  2009-11-06 21:14:09

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