LinqToSql Tutorial Code First
In LINQ to SQL, an object model is mapped to a relational database using attributes or an external mapping file to describe the structure of the relational database.
- You can create a new database using the
DataContext.CreateDatabase()method. - This method creates a replica of the database only to the extent of the information encoded in the object model.
- You can use the
DataContext.CreateDatabase()method in any number of scenarios, especially if a known data provider like Microsoft SQL Server is available.
Here is a simple object model which contains a Customer class.
public class CustomerContext : DataContext { public Table<Customer> Customers; public CustomerContext(string connection) : base(connection) { } } [Table(Name = "Customers")] public class Customer { [Column(IsPrimaryKey = true, IsDbGenerated = true)] public int CustomerId { get; set; } [Column] public string FirstName { get; set; } [Column] public string LastName { get; set; } [Column] public string Address { get; set; } }
The following code create a new database "CustomerContextDB" using the object model and insert a customer record.
CustomerContext db = new CustomerContext(@"Data Source=(localdb)\ProjectsV13;Initial Catalog=CustomerContext;"); db.CreateDatabase(); var customer = new Customer() { FirstName = "Maria", LastName = "Anders", Address = "Obere Str. 57", }; db.Customers.InsertOnSubmit(customer); db.SubmitChanges();