Manually drop and create DB in EF CodeFirst CTP5?
entity-framework
Question
For testing purposes I would like to manually be able to drop and recreate a DB using EF CodeFirst CTP5. How would I do this?
Accepted Answer
The DbDatabase class available as a property on your DbContext object offers a set of methods for directly working with database. You can use the Create and Delete method for this matter:
using (var context = new YourContext())
{
context.Database.Delete();
context.Database.Create();
// Or
context.Database.CreateIfNotExists();
}
Popular Answer
This works for me but not dave answer with entity framework 5.0. You will have to trigger a database trip that like a query in order to trigger the action.
Global.asax
Database.SetInitializer<MedicalVarianceDataContext >(new DataInitializer());
Elsewhere
public class DropDatabaseInitializer<T> : IDatabaseInitializer<T> where T : DbContext, new()
{
public DropDatabaseInitializer(Action<T> seed = null)
{
}
protected virtual void Seed(T context) { }
public void InitializeDatabase(T context)
{
if (context.Database.Exists())
{
context.Database.ExecuteSqlCommand("ALTER DATABASE " + context.Database.Connection.Database + " SET SINGLE_USER WITH ROLLBACK IMMEDIATE");
context.Database.ExecuteSqlCommand("USE master DROP DATABASE " + context.Database.Connection.Database);
}
context.Database.Create();
Seed(context);
}
}
I guess you will also need to add context.savechanges();
protected override void Seed(MedicalVarianceDataContext context)
{
new List<ViewLookUpIndividualUnit>{
new ViewLookUpIndividualUnit{ MvrsIndividualUnit="Clinic" ,Active=true}
}.ForEach(k => context.ViewLookUpIndividualUnits.Add(k));
base.Seed(context);
context.SaveChanges();
}
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