Update Startup.cs

swagger to display api version automatically

Author: math2018avan

Supermarket/Startup.cs

@@ -2,6 +2,7 @@
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.HttpOverrides;
 using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.ApiExplorer;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Newtonsoft.Json.Serialization;
@@ -44,17 +45,20 @@ public void ConfigureServices(IServiceCollection services)
 
             services.AddMvc().AddJsonOptions(options =>
             {
-                //Force Camel Case to JSON
                 options.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
             }).SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
 
+            services.ConfigureVersionedApiExplorer();
+
+            services.ConfigureApiVersioning();
+
             services.ConfigureAutoMapper();
 
-            services.ConfigureSwagger();
+            services.ConfigureSwagger(this.GetType());
         }
 
         // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
-        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
+        public void Configure(IApplicationBuilder app, IHostingEnvironment env, IApiVersionDescriptionProvider provider)
         {
             if (env.IsDevelopment())
             {
@@ -85,9 +89,13 @@ public void Configure(IApplicationBuilder app, IHostingEnvironment env)
 
             // Enable middleware to serve swagger-ui (HTML, JS, CSS, etc.), 
             // specifying the Swagger JSON endpoint.
-            app.UseSwaggerUI(c =>
+            app.UseSwaggerUI(options =>
             {
-                c.SwaggerEndpoint("/swagger/v1/swagger.json", "Supermarket API V1");
+                //Build a swagger endpoint for each discovered API version  
+                foreach (var description in provider.ApiVersionDescriptions)
+                {
+                    options.SwaggerEndpoint($"/swagger/{description.GroupName}/swagger.json", description.GroupName.ToUpperInvariant());
+                }
             });
         }
     }