首先建立ASP.NET CORE Web專案，然後按如下順序操作。

1.新增nuget程式包:

Microsoft.AspNetCore.Session;
Microsoft.AspNetCore.DataProtection.Redis;
Microsoft.Extensions.Caching.Redis.Core;
Microsoft.AspNetCore.Http;     //使用Session時有擴充套件方法

2.在appsettings.json中新增Redis配置:

{
  "Logging": {
    "IncludeScopes": false,
    "LogLevel": {
      "Default": "Warning"
    }
  },
  "WebConfig": {
    "Redis": {
      "Connection": "127.0.0.1:6379,allowAdmin=true,password=123456,defaultdatabase=5",
      "InstanceName": "Test_Redis_Session_"
    },
    "SessionTimeOut": "30" //session過期時長，分鐘
  }
}
 

3.在startup.cs類中，按如下例子新增程式碼:

// This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            // Add framework services.
            services.AddMvc();

            #region 使用Redis儲存Session
            var redisConn = Configuration["WebConfig:Redis:Connection"];
            var redisInstanceName = Configuration["WebConfig:Redis:InstanceName"];
            //Session 過期時長分鐘
            var sessionOutTime = Configuration.GetValue<int>("WebConfig:SessionTimeOut", 30);

            var redis = StackExchange.Redis.ConnectionMultiplexer.Connect(redisConn);
            services.AddDataProtection().PersistKeysToRedis(redis, "DataProtection-Test-Keys");
            services.AddDistributedRedisCache(option =>
            {
                //redis 連線字串
                option.Configuration = redisConn;
                //redis 例項名
                option.InstanceName = redisInstanceName;
            }
            );
            #endregion

            //新增Session並設定過期時長
            services.AddSession(options => { options.IdleTimeout = TimeSpan.FromMinutes(sessionOutTime); });
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
        {
            loggerFactory.AddConsole(Configuration.GetSection("Logging"));
            loggerFactory.AddDebug();


            app.UseSession();

            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                app.UseBrowserLink();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
            }

            app.UseStaticFiles();

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

4.在控制器HomeController中新增：

public class HomeController : Controller
    {
        public IActionResult Index()
        {
            ViewData["UserName"] = this.HttpContext.Session.GetString("UserName");
            ViewData["PassWord"] = this.HttpContext.Session.GetString("PassWord");
            return View();
        }


        [HttpPost]
        public NoContentResult Add(string userName,string pwd)
        {
            this.HttpContext.Session.SetString("UserName", userName);

            this.HttpContext.Session.SetString("PassWord", pwd);

            return NoContent();
        }
 

5.在View/Index.cshtml新增如下程式碼：

…………
<form method="post" action="../Home/Add">
    <div>
        <input name="username" id="username" type="text" value="@ViewData["UserName"]" />
        <input name="pwd" id="pwd" type="password" value="" />
        <input type="submit" value="更新" />
        <h1>提交使用者名稱稱為：@ViewData["UserName"]    密碼：@ViewData["PassWord"]</h1>
        <a href="javascript:void(0);" onclick="window.location.reload();">重新整理顯示最新值</a>
    </div>
</form>
  …………