1.传值方法
使用Request的方法（1-3）：
1）Query：获取链接？后面的值
如：http://localhost:55842/Home/About?name=kxy
public IActionResult About() ???????{ ???????????ViewData["Message"] = "Your application description page."; ???????????//-------------------------Request-------------------------------- ???????????string name = Request.Query["name"];//获取连接 ?name=kxy ???????????return Content(name); ???????}结果：页面显示kxy
2）Form：获取表单Post的值
string name = Request.Form["name"];
3）Cookies：本地保存的值
string name1 = Request.Cookies["name"];
使用HttpContext的方法（4）：
4）Session：服务器保存的值
using System.Diagnostics;using Microsoft.AspNetCore.Mvc;using CoreMvc.Models;using Microsoft.AspNetCore.Http;namespace CoreMvc.Controllers{ ???public class HomeController : Controller ???{ ???????public IActionResult Index() ???????{ ???????????return View(); ???????} ???????public IActionResult About() ???????{//-------------------------HttpContext---------------------------- ???????????//--------------------------Session------------------------------- ???????????//需要HttpContext需要引用using Microsoft.AspNetCore.Http; ???????????HttpContext.Session.SetString("name", "kxy"); ???????????string name = HttpContext.Session.GetString("name"); ???????????HttpContext.Session.Remove("name"); ???????????HttpContext.Session.SetInt32("age", 22); ???????????int? age = HttpContext.Session.GetInt32("age"); ???????????return Content(name); ???????} ???}}而且，需要修改Startup.cs
ConfigureServices方法注入（也就是添加） ???????????services.AddSession();Configure方法添加（告诉Asp.net Core使用内存存储Session数据） ???????????app.UseSession();
Core Mvc传值Request和HttpContext
原文地址：https://www.cnblogs.com/wskxy/p/9307977.html