（十三）在ASP.NET CORE中使用Options

  • 这一节介绍Options方法，继续在OptionsBindSample项目下。
  • 在项目中添加一个Controllers文件夹，文件夹添加一个HomeController控制器
  • HomeController.cs
  •  1         private readonly Class _myClass;
 2 
 3         public HomeController(IOptions<Class> classAccesser)//IOptions的方法注入
 4         {
 5             this._myClass = classAccesser.Value;
 6         } 
 7 
 8         public IActionResult Index()
 9         {
10             return View(_myClass);
11         }

     

  • 在项目中添加一个Views文件夹，文件夹中添加一个Home文件夹（这和ASP.NET MVC一样）,Home文件夹下添加一个Index.cshtml
  •  1 @model OptionsBindSample.Class
 2  3 @{
 4     ViewData["Title"] = "Index";
 5 }
 6 
 7 <h2>Index</h2>
 8 
 9 <div>
10     @foreach(var stu in Model.Students)
11     {
12         <span>Name:@stu.Name</span>
13         <span>Age:@stu.Age</span>
14 
15     }
16 </div>

     

  • 此时StartUp.cs应该改成这样
  •  1         public IConfiguration Configuration { get; set; }
 2 
 3         public Startup(IConfiguration configuration)
 4         {
 5             this.Configuration = configuration;
 6         }
 7 
 8         // This method gets called by the runtime. Use this method to add services to the container.
 9         // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
10         public void ConfigureServices(IServiceCollection services)
11         {
12             services.Configure<Class>(Configuration);
13 
14             services.AddMvc();
15         }
16 
17         // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
18         public void Configure(IApplicationBuilder app, IHostingEnvironment env)
19         {
20             if (env.IsDevelopment())
21             {
22                 app.UseDeveloperExceptionPage();
23             }
24 
25             app.UseMvcWithDefaultRoute();
26         }

     

也可以不用在Controller中依赖注入，而在视图中注入，改成如下：

HomeController.cs

1         public IActionResult Index()
2         {
3             return View();
4         }

Index.cshtml:

 1 @using Microsoft.Extensions.Options
 2 @inject IOptions<OptionsBindSample.Class> ClassAccesser
 3 @{
 4     ViewData["Title"] = "Index";
 5 }
 6 <h2>Index</h2>
 7 
 8 <div>
 9     @foreach(var stu in ClassAccesser.Value.Students)
10     {
11         <span>Name:@stu.Name</span>
12         <span>Age:@stu.Age</span>
13 
14     }
15 </div>

 

posted @ 2018-05-18 22:18  liu_xh  阅读(374)  评论(0)  编辑  收藏  举报