ASP. net mvc best practices (3)

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3. Use Bootstrap in global. asaxProgram(Bootstrapper) If you are in global. the asax application_start method executes too many tasks (such as configuring IOC/di, registering routing, model binding, view engine, and starting background services related to applications ). For example, in the latest oxite Source Code The following code snippet is available: protected virtual void onstart () {setupcontiner (); setupsite (); registerroutes (); registeractionfilters (); registermodelbinders (); registerviewengines (); launchbackgroundservices ();} Do you think it has performed too many tasks? Is there any way to expand it? How can I add a new route, model binding, and view engine to it without modifying it? Does it violate the open-closed principle? Bootstrapper is used to solve these problems. The process for creating bootstrapper is as follows:. create a task interface public interface ibootstrappertask {void execute ();} B. create a class for each type of task and implement the previously defined interface, such as: public class registercontrollerfactory: ibootstrappertask {private readonly icontrollerfactory _ controllerfactory; Public registercontrollerfactory (icontrollerfactory controllerfactory) {_ controllerfactory = controllerfactory;} public void execute () {controllerbuilder. current. setcontrollerfactory (_ controllerfactory);} public class registerroutes: ibootstrappertask {private readonly routecollection _ routes; Public registerroutes (): This (routetable. routes) {} public registerroutes (routecollection routes) {_ routes = routes;} public void execute () {_ routes. clear (); _ routes. ignoreroute ("{resource }. axd/{* pathinfo} "); _ routes. maproute ("default", "{controller}/{action}/{ID}", new {controller = "home", Action = "Index ", id = ""}) ;}} C. create a static bootstrapper class to execute these tasks: public static class bootstrapper {static bootstrapper () {configurecontainer ();} public static void run () {var tasks = servicelocator. current. getallinstances <ibootstrappertask> (); foreach (VAR task in tasks) {task. execute () ;}} Private Static void configurecontainer () {iunitycontainer Container = new unitycontainer (); unityconfigurationsection configuration = (unityconfigurationsection) configurationmanager. getsection ("Unity"); configuration. containers. default. configure (container); servicelocator. setlocatorprovider () => New unityservicelocator (container);} D. modify global. asaxprotected void application_start () {bootstrapper. run ();} e. modify Web . Config to concatenate tasks like this: <unity> <typealiases> <typealias alias = "icontrollerfactory" type = "system. web. MVC. icontrollerfactory, system. web. MVC "/> <typealias alias =" controllerfactory "type =" unitycommonservicelocatormvc. commonservicelocatorcontrollerfactory, unitycommonservicelocatormvc "/> <typealias alias =" ibootstrappertask "type =" unitycommonservicelocatormvc. ibootstrappertask, unitycommonservicelocatormvc "/> <Typealias alias =" registerroutes "type =" unitycommonservicelocatormvc. registerroutes, unitycommonservicelocatormvc "/> <typealias alias =" registercontrollerfactory "type =" unitycommonservicelocatormvc. registercontrollerfactory, unitycommonservicelocatormvc "/> </typealiases> <containers> <container> <types> <type name =" registerroutes "type =" ibootstrappertask "mapto =" registerroutes "/> <type = "IC Ontrollerfactory "mapto =" controllerfactory "/> <type name =" registercontrollerfactory "type =" ibootstrappertask "mapto =" registercontrollerfactory "> <typeconfig extensiontype =" Microsoft. practices. unity. configuration. typeinjectionelement, Microsoft. practices. unity. configuration "> <constructor> <Param name =" controllerfactory "parametertype =" icontrollerfactory "> <dependency/> </param> </constructor> </ty Peconfig> </type> </types> </container> </containers> </Unity> therefore, applications can be expanded by using the bootstrapper, we can create a new task and execute it in the application startup method without modifying anything.

Related reading:

• ASP. net mvc unleashed (6)(Geez, 2009-3-17)
• ASP. net mvc 1.0 officially released(Geez, 2009-3-18)
• ASP. net mvc unleashed (6) (continued)(Geez, 2009-3-21)
• ASP. net mvc technology topics(Zhu Xianzhong, 2009-3-27)
• Action filter for ASP. net mvc notes (idotnetspace)
• ASP. net mvc: analyze the tempdata mechanism (idotnetspace)
• ASP. net mvc Futures: MVC control Overview (geez, 2009-4-09)
• ASP. net mvc Futures: local view(Geez, 2009-4-10)
• ASP. net mvc best practices (1)(Geez, 2009-4-10)
• ASP. net mvc Best Practices (2)(Geez, 2009-4-13)