(12) Bind read configuration to C # instance

• Continue with the previous section, and then use options or bind to convert the configuration in the JSON file into C # entities and map them to each other. Start by creating an ASP. NET Core MVC Project Optionsbindsample
• Startup.cs, here, use dependency injection to add the configuration in.

• 1          Public Get Set ; } 2 3          Public Startup (iconfiguration configuration) 4         {5this             . Configuration = configuration; 6         }

• and build a Class.cs.

• 1  Public classClass2         {3              Public intClassno {Get;Set; }4              Public stringClassdesc {Get;Set; }5              PublicList<student> Students {Get;Set; }6         }7 8          Public classStudent9         {Ten              Public stringName {Get;Set; } One              Public stringAge {Get;Set; } A}

• Build another Appsettings.json (name must be called this, because in Program.cs webhost.createdefaultbuilder (args) reads the Appsettings.json file by default)

• 1 {2   "Classno":"1",3   "Classdesc":"ASP. NET Core 101",4   "Students": [5     {6       "name":"Liuxh",7       " Age":" to"8     },9     {Ten       "name":"LINHJ", One       " Age":" to" A     }, -     { -       "name":"Liuxy", the       " Age":"7" -  -  -  +     }, -     { +       "name":"Liuss", A       " Age":"1" at     } -   ] -  -}

• The last Starup.cs code is this

•          PublicIConfiguration Configuration {Get;Set; }  PublicStartup (iconfiguration configuration) { This. Configuration =configuration; }        //This method gets called by the runtime.        Use this method to add services to the container. //For more information on how to configure your application, visithttps://go.microsoft.com/fwlink/?LinkID=398940         Public voidconfigureservices (iservicecollection services) {}//This method gets called by the runtime. Use this method to configure the HTTP request pipeline.         Public voidConfigure (Iapplicationbuilder app, Ihostingenvironment env) {if(env. Isdevelopment ()) {app.            Usedeveloperexceptionpage (); } app. Run (Async(context) =            {                varMyClass =NewClass (); Configuration.bind (myClass);//map the information and objects of the configuration file .                awaitContext. Response.writeasync ($"Classno:{myclass.classno}"); awaitContext. Response.writeasync ($"Classdesc:{myclass.classdesc}"); awaitContext. Response.writeasync ($"{MyClass.Students.Count} Students");         }); }

• Finally start the web site

(12) Bind read configuration to C # instance