C# entity framework MVC second run error - entity-framework

Question

I am creating db and initializing data with code below, if DB doesnt exist, it creates db and populate it, when I run application second time I get error
Cannot drop database "aspnet-app" because it is currently in use.
Application_start, with initializations
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
WebApiConfig.Register(GlobalConfiguration.Configuration);
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles);
Database.SetInitializer(new ComponentDbInitialize());
ComputerContext context = new ComputerContext();
context.Database.Initialize(true); //here it fails on second run
context.SaveChanges();
}
ComputerContext
public ComputerContext():base("name=Default")
{
}
public DbSet<Computer> Computers { get; set; }
public DbSet<Motherboard> Motherboards { get; set; }
public DbSet<CPU> CPUs { get; set; }
public DbSet<Case> Cases { get; set; }
public DbSet<HDD> HDDs { get; set; }
public DbSet<RAM> RAMs { get; set; }
public DbSet<GPU> GPUs { get; set; }
public DbSet<PSU> PSUs { get; set; }
}
Initialize class
public class ComponentDbInitialize : DropCreateDatabaseAlways<ComputerContext>
{
protected override void Seed(ComputerContext context)
{
GetCpu().ForEach(p => context.CPUs.Add(p));
GetGpu().ForEach(p => context.GPUs.Add(p));
GetCase().ForEach(p => context.Cases.Add(p));
GetHdd().ForEach(p => context.HDDs.Add(p));
GetMb().ForEach(p => context.Motherboards.Add(p));
GetPsu().ForEach(p => context.PSUs.Add(p));
GetRam().ForEach(p => context.RAMs.Add(p));
context.SaveChanges();
}
private static List<CPU> GetCpu() .....
private static List<GPU> GetGpu().....
private static List<HDD> GetHdd()....
private static List<Case> GetCase()....
private static List<Motherboard> GetMb()....
private static List<PSU> GetPsu()....
private static List<RAM> GetRam()....
I get same error even with
context.Database.Initialize(false);
Thank you for any help/advice

Answer 1

Your initialiser is using the DropCreateDatabaseAlways class which, as it suggests, drops that database every time the application is initialised.
Instead perhaps you could use CreateDatabaseIfNotExists or DropCreateDatabaseIfModelChanges:
public class ComponentDbInitialize : CreateDatabaseIfNotExists<ComputerContext>
{
}