.net core 2.0 mvc 初步學習
阿新 • • 發佈:2018-06-02
OS table 處理機 d+ rect source service tor run
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> /// 用於獲取配置信息 /// </summary> /// <param name="configuration"></param> public StudyStartup(IConfiguration configuration) { Configuration = configuration; } public IServiceProvider ConfigureServices(IServiceCollection services) { //註入mvc services.AddMvc(); //添加Options services.AddOptions(); //獲取配置信息 services.Configure<AppSetting>(Configuration.GetSection(nameof(AppSetting))); //開啟Session功能 services.AddSession(options ={ options.IdleTimeout = TimeSpan.FromMinutes(30); }); //構建一個默認的serviceProvider處理對象 return services.BuildServiceProvider(); } public void Configure(IApplicationBuilder app, IHostingEnvironment environment, ILoggerFactory loggerFactory, IHttpContextFactory httpContextFactory, DiagnosticSource diagnosticSource, DiagnosticListener diagnosticListener) { //當前環境為開發環境 if (environment.IsDevelopment()) { app.UseBrowserLink(); app.UseDeveloperExceptionPage(); } else { app.UseExceptionHandler("/Home/Error"); } // 重要: session的註冊必須在UseMvc之前,因為MVC裏面要用 app.UseSession(); //使用webroot中的靜態文件 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)
相關源碼
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())//采用當前目錄作為內容跟目錄
//配置信息處理
.ConfigureAppConfiguration((Action<WebHostBuilderContext, IConfigurationBuilder>) ((hostingContext, config) =>
{
//註入運行環境
IHostingEnvironment hostingEnvironment = hostingContext.HostingEnvironment;
//加載配置文件
config.AddJsonFile("appsettings.json", true, true).AddJsonFile(string.Format("appsettings.{0}.json", (object) hostingEnvironment.EnvironmentName), true, true);
//根據運行環境加載相應文件
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);
}))
//配置日誌信息
.ConfigureLogging((Action<WebHostBuilderContext, ILoggingBuilder>) ((hostingContext, logging) =>
{
logging.AddConfiguration((IConfiguration) hostingContext.Configuration.GetSection("Logging"));
logging.AddConsole();
logging.AddDebug();
}))
.UseIISIntegration()//采用IIS進行發布
.UseDefaultServiceProvider((Action<WebHostBuilderContext, ServiceProviderOptions>) ((context, options) => options.ValidateScopes = context.HostingEnvironment.IsDevelopment()));//采用默認的處理機制
}
即若需要使用startup的有參構造,則需要在configureappconfiguration中進行配置相應處理類
請求走向:
初始:Run --> ConfigureServices --> Configure
配置信息的獲取:
<Controller>
protected AppSetting ConfigInfo { get; set; }
//讀取配置信息
protected BaseController(IOptions<AppSetting> options) => ConfigInfo = options.Value;
DI註入
1.創建的DI註入在ConfigureServices進行處理
註入方式:
services.AddSingleton(u => new MonsterDIController(new GuestDal()));//指定控制器進行註入
services.AddSingleton<IDal,DefaultDal>();//統一註入 全局共享一個
services.AddTransient<IDal, DefaultDal>();//統一註入 每次使用都不一樣,不同的類或不同的方法使用都不一樣
services.AddScoped<IDal, EmptyDal>();//統一註入 一次請求共享一個對象
註:
當對同一類型構造傳入不同類型對象的註入時,
不考慮註入類型或範圍
已最終註入類型為傳入對象創建實例
例如:
<Controller>
protected IDal Dal { get; set; }
public MonsterDIController(IDal dal)
{
this.Dal = dal;
}
<ConfigureServices>
如上述一致
<Result>
最終創建實例時,會傳入EmptyDal
開啟Session功能:
<method --> ConfigureServices>
services.AddSession(options => {
options.IdleTimeout = TimeSpan.FromMinutes(30);//存儲時長
});
<method --> Configure >
// 重要: session的註冊必須在UseMvc之前,因為MVC裏面要用
app.UseSession();
.net core 2.0 mvc 初步學習