asp.net mvc 3 - Wrapper class in MVC3 -

i want create wrapper class queries should not in controller. select queries placed in controller. want create layer abstraction.

i created viewmodel class. wrapper class else.

how do that?

i don't queries directly in controllers. have service layer controller call, , each service layer call repository insert, update or delete data or bring data.

the sample code below uses asp.net mvc3 , entity framework code first. lets assume want bring countries , use whatever reason in controller/view:

my database context class:

public class databasecontext : dbcontext {      public dbset<country> countries { get; set; } } 

my country repository class:

public class countryrepository : icountryrepository {      databasecontext db = new databasecontext();       public ienumerable<country> getall()      {           return db.countries;      } } 

my service layer calls repository:

public class countryservice : icountryservice {      private readonly icountryrepository countryrepository;       public countryservice(icountryrepository countryrepository)      {           // check nulls on countryrepository            this.countryrepository = countryrepository;      }       public ienumerable<country> getall()      {           // whatever else needs done            return countryrepository.getall();      } } 

my controller call service layer:

public class countrycontroller : controller {      private readonly icountryservice countryservice;       public countrycontroller(icountryservice countryservice)      {           // check nulls on countryservice            this.countryservice = countryservice;      }       public actionresult list()      {           // countries           ienumerable<country> countries = countryservice.getall();            // whatever need            return view();      } } 

there lots of info on internet on how data , display it, inserting, editing, etc. place start @ http://www.asp.net/mvc. work through tutorials, good. best.