MVC 上下文类

 public PerContext()
            : base("Name=Default")
        {
            Database.SetInitializer<PerContext>(null);

        }
        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
            modelBuilder.Conventions.Remove<IncludeMetadataConvention>();
            modelBuilder.Conventions.Remove<DecimalPropertyConvention>();
            modelBuilder.Conventions.Add(new DecimalPropertyConvention(18, 6));

            base.OnModelCreating(modelBuilder);
        }