.NetCore中Session的使用

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.Configure<CookiePolicyOptions>(options =>
            {
                // This lambda determines whether user consent for non-essential cookies is needed for a given request.
                options.CheckConsentNeeded = context => true;
                options.MinimumSameSitePolicy = SameSiteMode.None;
            });

            services.AddSession(options =>
            {
                options.IdleTimeout = TimeSpan.FromMinutes(30);
            });


            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
        }

        // 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();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
                app.UseHsts();
            }

            app.UseHttpsRedirection();
            app.UseStaticFiles();
            app.UseCookiePolicy();
            app.UseSession();

            app.UseMvc(routes =>
            {
                routes.MapRoute(
                  name: "areas",
                  template: "{area:exists}/{controller=Home}/{action=Index}/{id?}"
                );

                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}/{id?}");
            });


        }

using Microsoft.AspNetCore.Http;

namespace Microsoft.AspNetCore.Http
{
    public static class SessionExtensions
    {
        public static byte[] Get(this ISession session, string key);
        public static int? GetInt32(this ISession session, string key);
        public static string GetString(this ISession session, string key);
        public static void SetInt32(this ISession session, string key, int value);
        public static void SetString(this ISession session, string key, string value);
    }
}

HttpContext.Session.GetString("username");

HttpContext.Session.SetString("username", "admin");