Working with local data

Xamarin with SQLite

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Table of Contents

1. Architecture

2. Install SQLite.NET – for PCL Project

3. Implementation Shared code

Android

iOS

Windows Phone

Architecture

3

4

Architecture

Install SQLite.NET – PCL Project

Implementation Shared code

Android

iOS

Windows Phone

SQLite for PCL Project PCL – Portable Class Library Install SQLite.Net PCL from NuGet

5

6

Architecture Install SQLite.NET – PCL Project Implementation

Shared code Android

iOS

Windows Phone

Shared Code Initial database setup requires platform-

specific work Use Interfaces to abstract any platform-

specific functionality

Use the DependencyService to obtain an implementation

public interface ISQLite { SQLiteConnection GetConnection(); }

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public ItemDatabase() { SQLiteConnection database = DependencyService

.Get<ISQLite>().GetConnection(); InitializeDatabase(database);}

SQLite.NET syntax Create Table

Read item/s from database

Create/Add item to the database

Delete item from the database

Updata item in the database

database.CreateTable<T>();

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database.Table<T>();

database.Insert(item);

database.Delete<T>(item);

database.Update(item);

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Architecture Install SQLite.NET – PCL Project Implementation

Shared code

Android iOS

Windows Phone

10

Android Add SQLite.PCL – XamarinAndroid

Platform from NuGet

Database locationvar sqliteFilename = "SQLite.db3";string docPath = System.Environment.GetFolderPath (System.Environment.SpecialFolder.Personal);

var path = Path.Combine(docPath, sqliteFilename);

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Android Implement ISQLite Add assembly Dependency[assembly: Dependency (typeof (SQLite_Android))]public class SQLite_Android : ISQLite { public SQLiteConnection GetConnection () { var path = ...; var connection = new SQLiteConnection( new SQLitePlatformAndroid(), path);

return connection; }}

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Architecture Install SQLite.NET – PCL Project Implementation

Shared code

Android

iOS Windows Phone

13

iOS Add SQLite.PCL – XamarinIOS

Platform from NuGet

Database locationvar sqliteFilename = "SQLite.db3";string documentsPath = Environment.GetFolderPath (Environment.SpecialFolder.Personal);string libraryPath = Path.Combine (documentsPath, "..", "Library");

var path = Path.Combine(libraryPath, sqliteFilename);

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iOS Implement ISQLite Add assembly Dependency[assembly: Dependency (typeof (SQLite_iOS))]public class SQLite_iOS : ISQLite { public SQLiteConnection GetConnection () { var path = ...; var connection = new SQLiteConnection( new SQLitePlatformIOS(), path);

return connection; }}

15

Architecture Install SQLite.NET – PCL Project Implementation

Shared code

Android

iOS

Windows Phone

16

Implementation – WinPhone

Windows Phone does not include the SQLite database engine Download and Install

Precompiled Binaries for Windows Phone 8

Add References

Windows Phone SDK 8.0 > Extentions > SQLite

WinPhone Add SQLite.PCL – WindowsPhone8

Platform from NuGet

Implement ISQLitevar sqliteFilename = "SQLite.db3";

string path = Path.Combine( ApplicationData.Current.LocalFolder.Path, sqliteFilename);

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WinPhone Implement ISQLite Add assembly Dependency[assembly: Dependency (typeof (SQLite_WinPhone))]public class SQLite_WinPhone : ISQLite { public SQLiteConnection GetConnection () { var path = ...; var connection = new SQLiteConnection( new SQLitePlatformWP8(), path);

return connection; }}

Xamarin with SQLiteLive Demo

19

20

Summary Architecture Install SQLite.NET

For PCL Project

Implementation Shared code

Android

iOS

Windows Phone

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