Asp.net5+entityframework7 Development Practice (III)

1. Description

In the "Asp.net5+entityframework7 Development Practice (i)" introduced the storage mode, but not in the controller how to use?

This chapter re-adds. Note that dependency injection in ASP.NET5 is also used.

2. Warehousing mode

First look at the interface:

1    Public Interfaceirolerepository:idisposable2     {3         //IEnumerable and IQueryable4         //both of them delay loading in EF, but the difference is:5         //IEnumerable is the data that is loaded into memory, which is executed by swiping the data in memory6         //IQueryable is the query and swipe selected in the data source to execute7         //TODO: Complex conditional queries and Async methods8         //iqueryable<role> getroles ();9 TenIenumerable<role>getroles (); OneRole Getrole (int?ID); A         voidCreate (role role); -         voidUpdate (role role); -         voidDelete (int?ID); the}

Then look at its implementation:

  Public classRolerepository:irolerepository {PrivateEfcontext DB;  Publicrolerepository (Efcontext _db) {db=_db; }         PublicIenumerable<role>GetRoles () {returndb.        Roles.tolist (); }         PublicRole Getrole (int?ID) {returnDb. Roles.single (m = m.id = =ID); }         Public voidCreate (role role) {db.            Roles.add (role); Db.        SaveChanges (); }         Public voidDelete (int?ID) {db. Roles.remove (db. Roles.single (M= = M.id = =id)); Db.        SaveChanges (); }         Public voidUpdate (role role) {//Note: Db. Roles.update (role); I can't.db.            Changetracker.acceptallchanges (); Db.        SaveChanges (); }        #regionFreeing resourcesPrivate BOOLdisposed =false; protected Virtual voidDispose (BOOLdisposing) {            if(!disposed) {                if(disposing) {db. Dispose (); }} disposed=true; }         Public voidDispose () {Dispose (true); System.GC.SuppressFinalize ( This); }        #endregion    }

3. Controller use

1      Public classRolecontroller:controller2     {3         //pay attention to using the interface Oh4         Privateirolerepository rolerepository;5          PublicRolecontroller (irolerepository _rolerepository)6         {7Rolerepository =_rolerepository;8         }9         Ten          Publiciactionresult Index () One         { A             returnView (Rolerepository.getroles ()); -         } -          PublicIactionresult Details (int?ID) the         { -             if(id = =NULL) {returnhttpnotfound ();} -  -Role role =rolerepository.getrole (ID); +  -             if(Role = =NULL) {returnhttpnotfound ();} +  A             returnView (role); at         } -  -          Publiciactionresult Create () -         { -             returnView (); -         } in  - [HttpPost] to [Validateantiforgerytoken] +          PublicIactionresult Create (role role) -         { the             if(modelstate.isvalid) *             { $ rolerepository.create (role);Panax Notoginseng                 returnRedirecttoaction ("Index"); -             } the             returnView (role); +         } A  the          PublicIactionresult Edit (int?ID) +         { -             if(id = =NULL) {returnhttpnotfound ();} $  $Role role =rolerepository.getrole (ID); -             if(Role = =NULL) -             { the                 returnHttpnotfound (); -             }Wuyi             returnView (role); the         } -  Wu [HttpPost] - [Validateantiforgerytoken] About          PublicIactionresult Edit (role role) $         { -             if(modelstate.isvalid) -             {                 - rolerepository.update (role); A                 returnRedirecttoaction ("Index"); +             } the             returnView (role); -         } $  the[ActionName ("Delete")] the          PublicIactionresult Delete (int?ID) the         { the             if(id = =NULL) {returnhttpnotfound ();} -  inRole role =rolerepository.getrole (ID); the  the             if(Role = =NULL) {returnhttpnotfound ();} About  the             returnView (role); the         } the  +[HttpPost, ActionName ("Delete")] - [Validateantiforgerytoken] the          PublicIactionresult deleteconfirmed (intID)Bayi         { theRole role =rolerepository.getrole (ID); the rolerepository.delete (ID); -             returnRedirecttoaction ("Index"); -         } the}

4. Dependency Injection

In Startup.cs, add the injection configuration:

         Public void configureservices (iservicecollection services)        {            //...             // Dependency Injection            Services. Addsingleton<irolerepository, rolerepository>();            Services. Addmvc ();        }

5. Summary

The next chapter complements the unit of work ...

Asp.net5+entityframework7 Development Practice (III)