.netcoreMVC的Session保存之后取不到值的解决方案

1. Startup.cs 设置 Session 相关的内容

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;namespace Web
{public class Startup{public Startup(IConfiguration configuration){Configuration &＃61; 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.Configure(options &＃61;>{// This lambda determines whether user consent for non-essential COOKIEs is needed for a given request.options.CheckConsentNeeded &＃61; context &＃61;> true;options.MinimumSameSitePolicy &＃61; SameSiteMode.None;});//Session 保存到内存services.AddDistributedMemoryCache();services.AddSession();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.UseStaticFiles();app.UseCOOKIEPolicy();// 必须在 UseMvc 之前调用app.UseSession();app.UseMvc(routes &＃61;>{routes.MapRoute(name: "default",template: "{controller&＃61;Login}/{action&＃61;Index}/{id?}");});}}
}


2.  在创建验证码图片时设置 Session, 但在登录时获取不到 Session。

///

实际断点跟踪时&＃xff0c; 发现 Session.Id 前后都不一致了。

注&＃xff1a; 验证码是 普通提交&＃xff0c; 登录是  ajax 请求。

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解决方案&＃xff1a;

去掉&＃xff1a;

services.Configure(options &＃61;>{// This lambda determines whether user consent for non-essential COOKIEs is needed for a given request.options.CheckConsentNeeded &＃61; context &＃61;> true;options.MinimumSameSitePolicy &＃61; SameSiteMode.None;});