支持“XXXDbContext”上下文的模型已在数据库创建后发生更改。请考虑使用 Code First 迁移更新数据库(http://go.microsoft.com/fwlink/?LinkId=2

protected void Application_Start()
{

Database.SetInitializer(new DropCreateDatabaseIfModelChanges<TemperaturePointDbContext>());//添加这句话
AreaRegistration.RegisterAllAreas();

WebApiConfig.Register(GlobalConfiguration.Configuration);
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles);
AuthConfig.RegisterAuth();
Database.SetInitializer<DbContext>(null);
//System.Data.Entity.Database.SetInitializer(new System.Data.Entity.DropCreateDatabaseIfModelChanges<MvcGuestbook.Models.MvcGuestbookContext>());
}
}