Diligence. NET 4.0 (9)

Introduced

Ado.net Entity Framework 4.1 new features: Code a

Example

Web.config

<?xml version= "1.0"?>
<configuration>
    <connectionStrings>
        <!--
            You need to set the Persist security info to True to save password information
            Because Database.setinitializer<mycontext> (new dropcreatedatabaseifmodelchanges<mycontext> ()); You need to connect to the master library to determine if Code A is consistent with the database structure
        -->
        <add name= "myconnection" providername= "System.Data.SqlClient" connectionstring= "server=".; database=mydb;uid=sa;pwd=111111; Persist Security Info=true "/>
    </connectionStrings>
</configuration>

Global.asax.cs

Using System;
Using System.Collections.Generic;
Using System.Linq;
Using System.Web;
Using System.Web.Security;
Using System.Web.SessionState;
Using System.Data.Entity;
Using EF41. Codefirst;
Namespace EF41
{
    public class Global:System.Web.HttpApplication
    {
        protected void Application_Start (object sender, EventArgs e)
        {
            When code A is inconsistent with the database structure, delete the original database and regenerate the new database structure based on code
            Database.setinitializer<mycontext> (New dropcreatedatabaseifmodelchanges<mycontext> ());
            Don't do anything.
            Database.setinitializer<mycontext> (NULL);
        }
    }
}