Level of local SQLCE/other DB support in windows phone 8.1/using linq to sql from dll?

Question

I have had a mixed opinion for SQLCE support in windows phone 8/8.1. Is their still support for a local SQLCE or other database in windows phone 8.1? (A lot of different blog articles created their own handlers it appears and one used
an visual studio app called SQLmetal) I am hoping to at least figure out the libraries to use for Linq to SQL in windows phone 8.1 in order to access a local Database. I only need to retrieve data from a simple Database with one -
two tables and one of the tables has three fields.
I wish to access the local DB from a dll file even if I have to use Linq to SQL. The reason for this is to store data for a simple game while the app is running. However, I may need to send data to the database and would like to separate that
from the main application if possible. The only other question is: how do I add local database support to a dll file in windows phone 8.1? (This is my main objective but I need to know my database options first)
Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth. - "Sherlock holmes" "speak softly and carry a big stick" - theodore roosevelt. Fear leads to anger, anger leads to hate, hate leads to suffering
- Yoda. Blog - http://www.computerprofessions.co.nr

Answer 1

Windows Phone Silverlight 8.1 apps can still use LINQ to SQL (System.Data.Linq) see:
http://msdn.microsoft.com/en-us/library/windows/apps/hh202860(v=vs.105).aspx
For Windows Phone 8.1 [runtime] app you would need to use an external library like
SQLite 
There is a jumpstart training talk on using SQLite in Windows Phone 8.1 apps here:
http://channel9.msdn.com/Series/Building-Apps-for-Windows-Phone-8-1/19
I'm not sure what you mean by: "...access the local DB from a dll file..."  Do you mean you want the library used to access the database to be portable across
platforms?
Eric Fleck, Windows Store and Windows Phone Developer Support. If you would like to provide feedback or suggestions for future improvements to the Windows Phone SDK please go to http://wpdev.uservoice.com/ where you can post your suggestions and/or cast
your votes for existing suggestions.
I saw the first link and I think I have already been through some of that tutorial on channel 9 already.
I'm not sure what you mean by: "...access the local DB from a dll file..."  Do you mean you want the library used to access the database to be portable across platforms?
This would be a yes. I need use it to submit an application to the store (I wish to have the data and business logic in the dll file while having the GUI separate). I am currently using the portable dll but if you think using another dll type would help
I will try that. I am a VB.NET programmer and so I can see where some programmers get their worries about SQLCE (It seems a lot of VB and VB.NET programmers like it from my time helping on the VB.NET forums second to SQL Server only).
Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth. - "Sherlock holmes" "speak softly and carry a big stick" - theodore roosevelt. Fear leads to anger, anger leads to hate, hate leads to suffering
- Yoda. Blog - http://www.computerprofessions.co.nr
Nevermind, I changed the dll type to "Silverlight" and I can use the System.Data.Linq reference at least.
Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth. - "Sherlock holmes" "speak softly and carry a big stick" - theodore roosevelt. Fear leads to anger, anger leads to hate, hate leads to
suffering - Yoda. Blog - http://www.computerprofessions.co.nr