Using SQLCE for storing data in Windows Phone 8.1. Mapping of 1-to-1, 1-to-many using datacontext.

1. When database matters!
Fiyaz Bin Hasan
Former MSP (AUST) , NerdCats

2. When to choose what?

3. Persist data in my WP 8.1 (Silverlight) app
Local database (SQLCE) saves the day
Store relational data
Sits in app’s local folder
Use LINQ TO SQL for
 CREATE
 RETRIEVE
 UPDATE
 DELETE

4. What about Windows Phone Apps under
WinRT framework?

5. Third party database support!
SQLite for Windows Phone 8.1
World’s most popular database
Used in other OS too
Fast & Reliable
Support for multiple tables, triggers, views, indices
Follow ACID rules

6. What you need to
know when using
database in WP 8.1
(Silverlight)

7. Your database is in your code
DataContext
Act as a proxy, object that represents the database.
Table objects, represents a table in the database.
Made up of entities
Entity is a “plain old CLR object” (POCO) with attributes.

8. Behind the scene!
BlogId BlogName
Value Value
Blogs Table
PostId PostName
Value Value
Posts Table
BlogPostDatacontext

9. Play with data in OOP manners
LINQ TO SQL
ORM capabilities
Use LINQ to speak with the database
Translate LINQ to Transact-SQL and query the
database
Took the results and translate it again to LINQ

10. How it really works!
DataContext and Local database relation
Data Context Local Database
LINQ TO SQL
RUNTIME

11. Define who goes where!
LINQ to SQL mapping attributes
Specify database-specific features such as tables,
columns, primary keys, and indexes.
DatabaseAttribute (Name)
TableAttribute (Name)
ColumnAttribute (AutoSync, IsForeignKey, DbType, IsVersion)
AssociationAttribute (IsForeignKey, DeleteRule)
DataAttribute (Storage)

12. Teach LINQ TO SQL what to do
PostId (Pk) PostContent
Value (NOT NULL)
(AUTOINCREMENT)
(INT)
Value
Post Table

13. Association (1 to many)
PostId (Pk) PostContent BlogId
Value (NOT NULL)
(AUTOINCREMENT)
(INT)
Value value
BlogId (Pk) BlogName
Value (NOT NULL)
(AUTOINCREMENT)
(INT)
Value
Foreign Key
Post table
Blog table 1
M

14. Association dissection!
Foreign Key
Navigational Property
(Blog Reference)
Post list reference

15. Its time for CRUD

16. CRUD with LINQ
SELECT/RETRIEVE
INSERT/CREATE
UPDATE
DELETE
After All
_blogPostDataContext.SubmitChanges();

17. DEMO

18. What you need to
know when using
database in WP 8.1
(WinRT)