EF Code-first Learning Journey Database Initialization

The base class constructor for the context class has the following arguments

1. No parameters

If you do not add a parameter to the base class constructor, it creates the database in the local SQLEXPRESS server named {Namespace}. {Context class name}

namespace schooldatalayer{    publicclass  context:dbcontext     {        public  Base()        {                    }     }}

The database name created above is:schooldatalayer.context

2. The parameter is: database name

If the base class constructor specifies the name of the database, the local SQLEXPRESS database server is created with the name given to you.

namespace schooldatalayer{    publicclass  context:dbcontext     {        public  base("myschooldb")         {                           }}    }

The database name above is:myschooldb

3. The parameter is: connection string name

You can create a connection string in app. Config or Web. config, and code first creates a database based on the connection string if the parameters used by the base class constructor have been name=

 namespace   schooldatalayer{ public  class   Context:dbcontext { public  schooldbcontext (): base  ("  name= schooldbconnectionstring   " ) {}} }

<?xml version="1.0" encoding="utf-8" ?>< configuration>    <connectionStrings>    <add name="schooldbconnectionstring "      connectionString="Data source=.;i Nitial catalog=schooldb-byconnectionstring;integrated security=true"     providerName ="System.Data.SqlClient"/>    </connectionstrings></ Configuration>

EF Code-first Learning Journey Database initialization