ASP. NET MVC 3.0 Knowledge Point collation-----(3). ASP. NET MVC 3 and ASP 4 comparison

The version of ASP. NET MVC is updated very quickly, and each version is built on the previous version to optimize performance and improve functionality.

Below, I compare the next two versions and find the most basic differences. (In the Update supplement: ）

I. About the different configuration class global.asax

　　To reduce the clutter of the configuration class, ASP. NET MVC 4 will separate the contents of the Global.asax file into several configuration files under App_start.

in ASP. NET MVC 3:

 Public Static voidregisterglobalfilters (globalfiltercollection filters) {filters. ADD (NewHandleerrorattribute ());}
//set up Routes Public Static voidregisterroutes (routecollection routes) {routes. Ignoreroute ("{Resource}.axd/{*pathinfo}"); Routes. MapRoute ("Default",//Route name        "{Controller}/{action}/{id}",//route matching format, default URL        New{controller ="Home", action ="Index", id = urlparameter.optional}//Default Parameters    );}protected voidApplication_Start () {arearegistration.registerallareas (); //Use LocalDB for Entity Framework by defaultDatabase.defaultconnectionfactory =NewSqlconnectionfactory (@"Data source= (localdb) \v11.0; Integrated security=true; Multipleactiveresultsets=true");    Registerglobalfilters (globalfilters.filters);    RegisterRoutes (routetable.routes);    BootstrapSupport.BootstrapBundleConfig.RegisterBundles (System.Web.Optimization.BundleTable.Bundles); BootstrapMvcSample.ExampleLayoutsRouteConfig.RegisterRoutes (routetable.routes);}

in ASP. NET MVC 4:

protected void Application_Start () {    arearegistration.registerallareas ();    webapiconfig. Register (globalconfiguration.configuration);    filterconfig. Registerglobalfilters (globalfilters.filters);    routeconfig. RegisterRoutes (routetable.routes);    bundleconfig. Registerbundles (bundletable.bundles);}

Where the config file is used separately in the App_start folder.

WebApiConfig.cs:  filterconfig.cs :   routeconfig.cs:  Bundleconfig.cs:  related to bundling and narrowing of register Bundles, default CSS and JS, and so on.