ASP.NET Core Web API：将应用设置值注入控制器路由

Question

我有一个 ASP.NET Core Web API 项目，我希望我的控制器的路由是：

api/vX.Y/custom_name

例如，我会在 AppSettings 中设置第二个值

"ApiVersion":"vX.Y"

但我不确定如何将此值“注入”到控制器路由中。

Answer 1

如果您想从appsettings.json启用默认的api版本，您可以尝试关注：

1. appsettings.json

   {
       "ApiVersion": "2.1"
   }
   

2. ConfigureApiVersioningOptions

   public class ConfigureApiVersioningOptions : IConfigureOptions<ApiVersioningOptions>
   {
       private readonly IServiceProvider _serviceProvider;
   
       public ConfigureApiVersioningOptions(IServiceProvider serviceProvider)
       {
           _serviceProvider = serviceProvider;
       }
       public void Configure(ApiVersioningOptions options)
       {
           var apiVersion = _serviceProvider.GetRequiredService<IConfiguration>().GetSection("ApiVersion").Value;
           options.DefaultApiVersion = ApiVersion.Parse(apiVersion);
       }
   }
   

3. Startup.cs

   public class Startup
   {
       public Startup(IConfiguration configuration)
       {
           Configuration = configuration;
       }
   
       public IConfiguration Configuration { get; }
   
       // This method gets called by the runtime. Use this method to add services to the container.
       public void ConfigureServices(IServiceCollection services)
       {
           services.AddMvc(options => {
               options.EnableEndpointRouting = false;
           });
           services.AddApiVersioning();
           services.AddSingleton<IConfigureOptions<ApiVersioningOptions>, ConfigureApiVersioningOptions>();
       }
   
       // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
       public void Configure(IApplicationBuilder app, IHostingEnvironment env)
       {
           if (env.IsDevelopment())
           {
               app.UseDeveloperExceptionPage();
           }
   
           app.UseMvc();
       }
   }
   

4. ValuesController

   [ApiController]
   [Route("api/v{version:apiVersion}/Values")]
   public class ValuesController : Controller
   {
       // GET api/values
       [HttpGet]
       public IEnumerable<string> Get()
       {
           return new string[] { "value113", "value223" };
       }
   }