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SQL CE & Windows Phone
The easy way
Paul Scivetti
[email protected]
@TheIdeaGuy
BuzzTheCloud.com
January 17, 2012
SQL CE +
Win Phone!
Table
Designer
Stored
Procs
MS Dev
Tools
T-SQL
Entity
Framework
L2S + “Code First”
Seriously?
#%*$!!
Better
Way?
•Simple
•Useful
•Balanced
• SQL CE Basics
• Tools
• Using L2S
• Performance
Demo
SQL CE Basics
• Where is the Database?
• Create / Modify Database
• Create Tables
Where is the Database?
using System.Data.Linq;
public partial class DBDataContext : DataContext
{
public DBDataContext() :
base("Data Source=isostore:/PhoneDemoDB.sdf")
{
OnCreated();
}
}
Create Database
DBDataContext db = new DBDataContext();
if (!db.DatabaseExists())
{
db.CreateDatabase();
var updater = db.CreateDatabaseSchemaUpdater();
updater.DatabaseSchemaVersion = DB_CURRENT_VERSION;
updater.Execute();
}
Update Schema
var updater = db.CreateDatabaseSchemaUpdater();
int dbVersion = updater.DatabaseSchemaVersion ;
if (dbVersion < DB_CURRENT_VERSION)
{
if (dbVersion < 2)
{
updater.AddTable<Log>();
updater.AddColumn<Food>("Calories");
}
updater.DatabaseSchemaVersion = DB_CURRENT_VERSION;
updater.Execute();
}
Code
SQL CE Basics
• Where is the Database?
• Create / Modify Database
• Create Tables
#%*$!!
• SQL CE Basics
• Tools
• Using L2S
• Performance
1. Design Tables
4. Use L2S in App
2. Run SQLMetal
3. Tweak code
SQLMetal
• Windows SDK
• Command line tool
• Generates mapping classes
• Almost WinPhone Compatible
.\SqlMetal.exe
/server:.\sqlexpress
/database:phonedemo
/code:c:\metal\phonedemo.cs
/context:DBDataContext
/pluralize
/namespace:PhoneApp2
Code
• SQL CE Basics
• Tools
• Using L2S
• Performance
Query Syntax:
DBDataContext db = new DBDataContext();
var qry = from f in db.Foods
orderby f.Description
select f;
foreach (Food item in qry)
{
// process each food item
}
Fluent Syntax:
DBDataContext db = new DBDataContext();
var qry = db.Events.OrderByDescending(o => o.MeetingDate)
.ThenBy(o => o.Topic);
foreach (Event item in qry)
{
// process each event
}
CRUD: Insert
DBDataContext db = new DBDataContext();
Food f = new Food();
f.Description = “Mushroom Pizza”;
db.Foods.InsertOnSubmit(f);
db.SubmitChanges();
Code
• SQL CE Basics
• Tools
• Using L2S
• Performance
Async Access
using System.Threading.Tasks;
private async void LoadFoodAsync()
{
ObservableCollection<Food> res =
new ObservableCollection<Food>();
await TaskEx.Run(() =>
{
DBContext db = new DBContext();
var qry = from s in db.Food select s;
res = new ObservableCollection<Food>(qry);
});
this.FoodItems = res;
}
Performance Tuning
using System.Data.Linq;
public partial class DBDataContext : DataContext
{
// default buffer size: 384K
public DBDataContext() :
base("Data Source=isostore:
/PhoneDemoDB.sdf;max buffer size=1024")
{
OnCreated();
}
}
Resources
Windows Phone Development
create.msdn.com
LINQ to SQL
SQL CE & Windows Phone
The easy way
Paul Scivetti
[email protected]
@TheIdeaGuy
BuzzTheCloud.com
January 17, 2012
SQL CE & Windows Phone
The easy way
Paul Scivetti
[email protected]
@TheIdeaGuy
BuzzTheCloud.com
January 17, 2012