Offline data sync presenta con SQLite in Universal …...Agenda •SQLite UWP What is/isn’tSQLite...
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presenta www.wpc2015.it – [email protected] - +39 02 365738.11 - #wpc15it 1 WI005 - Offline data sync con SQLite in Universal Windows Platform Erica Barone Microsoft Technical Evangelist @_ericabarone [email protected] Massimo Bonanni Microsoft MVP , Intel Black Belt Intel Software Innovator @massimobonanni [email protected]
Transcript of Offline data sync presenta con SQLite in Universal …...Agenda •SQLite UWP What is/isn’tSQLite...
presenta
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WI005 - Offline data synccon SQLite in Universal Windows Platform
Erica BaroneMicrosoft Technical Evangelist
@_ericabarone
Massimo Bonanni
Microsoft MVP, Intel Black Belt
Intel Software Innovator
@massimobonanni
Agenda
• SQLite UWPWhat is/isn’t SQLite
SQLite for UWP
.NET APIs SQLite.NET-PCL vs SQLitePCL
Tools
• Offline Data syncMobile App
SyncAsync
PCL
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• Open source RDBMS.
• Works as library instead of service (in-process)
• Single file database. Triggers
Tables
Indices
Views
• Cross Platform database (Mac, Windows, Linux).
• Cross Technology Database (WPF, UWP, Win Form).
• Implements most of the SQL standard (SQL92). RIGHT and FULL OUTER JOIN
Only the RENAME TABLE and ADD COLUMN variants of the ALTER TABLE
VIEWs in SQLite are read-only.
• Zero-configuration
What is SQLite?
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• Not a full database application No forms
No reports
No saved queries
What isn’t SQLite?
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• Contains an extension SDK and all other components needed to use SQLite for UAP application development with Visual Studio 2015.
• Visual Studio Extension (.vsix) Install from Visual Studio (Tools – Extensions and Updates…)
Or download from SQLite.org
SQLite for Universal App Platform
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SQLite.NET-PCLLINQ syntax
Lightweight ORM (no navigation properties)
.NET APIs
SQLitePCLSQL statements (ADO Style)
Thin wrapper around the SQLite C APIFrom Microsoft Open Technologies
var conn = new SQLiteConnection(new Platform.WinRT.SQLitePlatformWinRT(), dbName);conn.CreateTable<Libro>();
var conn = new SQLiteConnection(dbName);sql = @"CREATE TABLE IF NOT EXISTS [Libri](
[Id] INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL UNIQUE, [Titolo] VARCHAR(100) NOT NULL,[Abstract] VARCHAR(255), [ISBN] CHAR(13), [Pagine] SMALLINT, [Copertina] IMAGE, [IdAutore] INTEGER NOT NULL, CONSTRAINT [Autiri_Libri] FOREIGN KEY([IdAutore]) REFERENCES Autori([Id]));";
using (var statement = conn.Prepare(sql)){
statement.Step();}
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Create a database
SQLite.NET-PCL
SQLitePCL
[Table("Libri")]public class Libro : ILibro{
[PrimaryKey, AutoIncrement]public long Id { get; set; }[MaxLength(100)]public string Titolo { get; set; }[MaxLength(255)]public string Abstract { get; set; }[MaxLength(13)]public string ISBN { get; set; }public long Pagine { get; set; }public byte[] Copertina { get; set; }public long IdAutore { get; set; }public IAutore Autore { get; set; }public ICollection<IRecensione> Recensioni { get; set; }
}
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Query
SQLite.NET-PCL
SQLitePCL
var libri = DB.Table<Libro>().Where(l => l.IdAutore == idAutore)
using (var dbconn = new SQLiteConnection(DatabaseName)){
using (var statement = dbconn.Prepare(@"SELECT [Libri].[Titolo], [Libri].[Id] as IdLibro, [Libri].[Abstract],[Libri].[ISBN], [Libri].[Pagine], [Libri].[Copertina], [Libri].[IdAutore], [Autori].[Cognome], [Autori].[Nome]
FROM [Libri] INNER JOIN [Autori] ON [Autori].[Id] = [Libri].[IdAutore]"))
{while (SQLiteResult.ROW == statement.Step())
retList.Add(Mapper.Map<ISQLiteStatement, Libro>(statement));}
}
No Navigation
Properties
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CRUD Operations
SQLite.NET-PCL
SQLitePCL
using (var dbconn = new SQLiteConnection(DatabaseName)){
using (var statement = dbconn.Prepare(@"INSERT INTO [Libri] ([Titolo],[Abstract],[ISBN],[Pagine],[Copertina],[IdAutore])VALUES (@Titolo,@Abstract,@ISBN,@Pagine,@Copertina,@IdAutore)"))
{statement.Bind("@Titolo", entity.Titolo);statement.Bind("@Abstract", entity.Abstract);statement.Bind("@ISBN", entity.ISBN);statement.Bind("@Pagine", entity.Pagine);statement.Bind("@Copertina", entity.Copertina);statement.Bind("@IdAutore", entity.IdAutore);
result = SQLiteResult.OK == statement.Step();}
}
DB.Insert(entity, typeof(Libro))
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Transactions
SQLite.NET-PCL
SQLitePCL
DB.BeginTransaction();// do something with Databaseif (/* something wrong */) DB.Rollback();else DB.Commit();
using (var dbconn = new SQLiteConnection(DatabaseName)){
using (var statement = dbconn.Prepare("BEGIN TRANSACTION")){
statement.Step();}// Execute one or more statements...using (var lbrCommand = dbconn.Prepare("INSERT INTO Libri (Titolo, Abstract, ISBN) VALUES (@Titolo, @Abstract, @ISBN)")){
//.....}using (var recCommand = dbconn.Prepare("INSERT INTO Recensioni (Testo, Voto, IdLibro) VALUES (@Testo, @Voto, @IdLibro)")){
//.....}// COMMIT to accept all changes or ROLLBACK TRANSACTION to discard pending changesusing (var statement = dbconn.Prepare("COMMIT TRANSACTION")){
statement.Step();}
}
Sync your data on all devices
Mobile App
SQL DB
User Authentication
Offline sync
Twitter provider
AuthenticationUWP App
VS 2015
Demo overview
Mobile App
SyncAsync
Every time the data change, the method SyncAsync must be called in order to update the SQL Database
Push sends all CUD changes since thelast push. Note that it is not possibleto send only an individual table'schanges. Push executes a series ofREST calls to your Azure Mobile Appbackend, which in turn will modifyyour server database.
Pull is performed on a per-table basis andcan be customized with a query to retrieveonly a subset of the server data. The AzureMobile client SDKs then insert the resultingdata into the local store.
UWP App
Android App
PCL
Mobile App
SQL DB
User Authentication
Twitter provider
Authentication
Offline sync
Wrap your code into a PCL
UWP App running on PC - Android App running on Android Tablet
Contatti OverNetEducation
OverNet [email protected]
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Tel. 02 365738
@overnete
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