Public abstract void onCreate(SQLiteDatabase db)Ĭalled only once when database is created for the first time. There are many methods in SQLiteOpenHelper class. SQLiteOpenHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version, DatabaseErrorHandler errorHandler)Ĭreates an object for creating, opening and managing the database. SQLiteOpenHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version)Ĭreates an object for creating, opening and managing the database. There are two constructors of SQLiteOpenHelper class. For performing any database operation, you have to provide the implementation of onCreate() and onUpgrade() methods of SQLiteOpenHelper class. The class is used for database creation and version management. SQLiteOpenHelper class provides the functionality to use the SQLite database. For displaying data on the spinner or listview, move to the next page. Here, we are going to see the example of sqlite to store and fetch the data. So, there is no need to perform any database setup or administration task. used to perform database operations on android devices such as storing, manipulating or retrieving persistent data from the database. We need to go to the appsettings.json and add a connection string for our database.SQLite is an open-source relational database i.e. In the seed data, we define "bob tester" user and assign the role of Admin. This simple class contains one DbSet, a constructor for AuthDbContext and an OnModelCreating where the modelBuilder.Entity for AppUser defines all of the properties and sets attributes such as the primary key, max length and others.įinally, Entity.HasData provides 'seed' data, or an initial record in our database. Protected override void OnModelCreating(ModelBuilder modelBuilder)Įntity.Property(e => e.Provider).HasMaxLength(250) Įntity.Property(e => e.NameIdentifier).HasMaxLength(500) Įntity.Property(e => e.Username).HasMaxLength(250) Įntity.Property(e => e.Password).HasMaxLength(250) Įntity.Property(e => e.Email).HasMaxLength(250) Įntity.Property(e => e.Firstname).HasMaxLength(250) Įntity.Property(e => e.Lastname).HasMaxLength(250) Įntity.Property(e => e.Mobile).HasMaxLength(250) Įntity.Property(e => e.Roles).HasMaxLength(1000) Public AuthDbContext(DbContextOptions options) : base(options) We need to add an AuthDbContext which will inherit from the DbContext in Entity Framework. It will convert a comma-delimited list of roles for a user and split them into a list of strings. It also contains a string for roles which will hold a comma-delimited list of strings. UserId, Provider, NameIdentifier, Username, etc. Return Roles?.Split(',').ToList()?new List() Here is the code for the class: public class AppUser Sqlite packages added.Īdd a new folder to contain all the data items, then add a new class AppUser.cs Next, add .Ĭheck to be sure that we have actually added those dependencies: Start by launching "manage nuget packages" window and add. Walkthroughįirst, let's add some nuget packages. Sometimes it is helpful to use a local database while developing and while you could load up a local Sql Server database, SQLite is a very lightweight option and makes it easy for other developers to clone your repository and get up and running right away. If you would like, you can watch the walkthrough on YouTube: Introduction In this post we will learn how to add a SQLite database to an ASP.NET core project using Entity Framework core, code-first.
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