.net core 2.0 mvc 初步学习

mvc_study

StudyStartup

using System;using System.Collections.Generic;using System.Diagnostics;using System.Linq;using System.Threading.Tasks;using Microsoft.AspNetCore.Builder;using Microsoft.AspNetCore.Hosting;using Microsoft.AspNetCore.Http;using Microsoft.Extensions.Configuration;using Microsoft.Extensions.DependencyInjection;using Microsoft.Extensions.Logging;using Web.Study.ConfigModel;using Web.Study.MonsterInterface;namespace Web.Study.InhertStartup{ ???public class StudyStartup ???{ ???????protected IConfiguration Configuration { get; set; } ???????public StudyStartup() ???????{ ???????} ???????/// <summary> ???????/// 用于获取配置信息 ???????/// </summary> ???????/// <param name="configuration"></param> ???????public StudyStartup(IConfiguration configuration) ???????{ ???????????Configuration = configuration; ???????} ???????public IServiceProvider ConfigureServices(IServiceCollection services) ???????{ ???????????//注入mvc ???????????services.AddMvc(); ???????????//添加Options ???????????services.AddOptions(); ???????????//获取配置信息 ???????????services.Configure<AppSetting>(Configuration.GetSection(nameof(AppSetting))); ???????????//开启Session功能 ???????????services.AddSession(options ={ ???????????????options.IdleTimeout = TimeSpan.FromMinutes(30); ???????????}); ???????????//构建一个默认的serviceProvider处理对象 ???????????return services.BuildServiceProvider(); ???????} ???????public void Configure(IApplicationBuilder app, ???????????IHostingEnvironment environment, ???????????ILoggerFactory loggerFactory, ???????????IHttpContextFactory httpContextFactory, ???????????DiagnosticSource diagnosticSource, ???????????DiagnosticListener diagnosticListener) ???????{ ???????????//当前环境为开发环境 ???????????if (environment.IsDevelopment()) ???????????{ ???????????????app.UseBrowserLink(); ???????????????app.UseDeveloperExceptionPage(); ???????????} ???????????else ???????????{ ???????????????app.UseExceptionHandler("/Home/Error"); ???????????} ???????????// 重要: session的注册必须在UseMvc之前，因为MVC里面要用 ????????????app.UseSession(); ???????????//使用webroot中的静态文件 ???????????app.UseStaticFiles(); ???????????app.UseMvc(routes => ???????????{ ???????????????routes.MapRoute( ???????????????????name: "default", ???????????????????template: "{controller=Home}/{action=Index}/{id?}"); ???????????}); ???????} ???}}

Program

 ???public static IWebHost BuildWebHost<T>(string[] args) where T:class ????{ ???????IWebHostBuilder webHostBuilder = WebHost.CreateDefaultBuilder(args); ???????IWebHostBuilder hostBuilder = webHostBuilder.UseStartup<T>(); ???????IWebHost webHost = hostBuilder.Build(); ???????return webHost; ???}

code explain

construction

public StudyStartup(IConfiguration configuration)相关源码IWebHostBuilder webHostBuilder = WebHost.CreateDefaultBuilder(args);方法解析public static IWebHostBuilder CreateDefaultBuilder(string[] args){ ?return new WebHostBuilder() ?????.UseKestrel()//Specify Kestrel as the server to be used by the web host. ?????.UseContentRoot(Directory.GetCurrentDirectory())//采用当前目录作为内容跟目录 ?????//配置信息处理 ?????.ConfigureAppConfiguration((Action<WebHostBuilderContext, IConfigurationBuilder>) ((hostingContext, config) => ?????{ ????????????//注入运行环境 ???????????IHostingEnvironment hostingEnvironment = hostingContext.HostingEnvironment; ?????????????//加载配置文件 ???????????config.AddJsonFile("appsettings.json", true, true).AddJsonFile(string.Format("appsettings.{0}.json", (object) hostingEnvironment.EnvironmentName), true, true); ?????????//根据运行环境加载相应文件 ???????????if (hostingEnvironment.IsDevelopment()) ???????????{ ?????????????Assembly assembly = Assembly.Load(new AssemblyName(hostingEnvironment.ApplicationName)); ?????????????if (assembly != (Assembly) null) ???????????????config.AddUserSecrets(assembly, true); ???????????} ???????????config.AddEnvironmentVariables(); ???????????if (args == null) ?????????????return; ???????????config.AddCommandLine(args); ?????})) ?????//配置日志信息 ?????.ConfigureLogging((Action<WebHostBuilderContext, ILoggingBuilder>) ((hostingContext, logging) => ?????{ ???????logging.AddConfiguration((IConfiguration) hostingContext.Configuration.GetSection("Logging")); ???????logging.AddConsole(); ???????logging.AddDebug(); ?????})) ?????.UseIISIntegration()//采用IIS进行发布 ?????.UseDefaultServiceProvider((Action<WebHostBuilderContext, ServiceProviderOptions>) ((context, options) => options.ValidateScopes = context.HostingEnvironment.IsDevelopment()));//采用默认的处理机制}

即若需要使用startup的有参构造，则需要在configureappconfiguration中进行配置相应处理类

请求走向:

初始:Run --> ConfigureServices --> Configure

配置信息的获取:

<Controller>protected AppSetting ConfigInfo { get; set; } ???//读取配置信息protected BaseController(IOptions<AppSetting> options) => ConfigInfo = options.Value;

DI注入

1.创建的DI注入在ConfigureServices进行处理

注入方式：services.AddSingleton(u => new MonsterDIController(new GuestDal()));//指定控制器进行注入services.AddSingleton<IDal,DefaultDal>();//统一注入 ?全局共享一个services.AddTransient<IDal, DefaultDal>();//统一注入 ???每次使用都不一样，不同的类或不同的方法使用都不一样services.AddScoped<IDal, EmptyDal>();//统一注入 ??一次请求共享一个对象注： ???当对同一类型构造传入不同类型对象的注入时， ???不考虑注入类型或范围 ???已最终注入类型为传入对象创建实例例如: ???<Controller> ???????protected IDal Dal { get; set; } ???????public MonsterDIController(IDal dal) ???????{ ???????????this.Dal = dal; ???????} ???<ConfigureServices> ???????如上述一致 ???<Result> ???????最终创建实例时，会传入EmptyDal

开启Session功能：

<method --> ConfigureServices> ???services.AddSession(options => { ???????????options.IdleTimeout = TimeSpan.FromMinutes(30);//存储时长 ???????});<method --> Configure > ???// 重要: session的注册必须在UseMvc之前，因为MVC里面要用 ????????app.UseSession();

.net core 2.0 mvc 初步学习

原文地址：https://www.cnblogs.com/monster17/p/9125165.html