刚使用.NET Core会不习惯，比如如何使用Session；不仅需要引用相应的类库，还需要在Startup.cs里进行注册。
1、在你的项目上基于NuGet添加：
install-package Microsoft.AspNetCore.Session -ver 2.0
install-package Microsoft.AspNetCore.Http.Extensions -ver 2.0
2、在Startup.cs里进行注册
在Startup.cs文件中的ConfigureServices方法中添加：
services.AddSession();
在Startup.cs文件中的Configure方法中添加：
app.UseSession();
添加后代码如下：
public void ConfigureServices(IServiceCollection services)
{
services.AddSession();
services.AddMvc();
}
public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
loggerFactory.AddConsole(Configuration.GetSection("Logging"));
loggerFactory.AddDebug();
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
app.UseBrowserLink();
}
else
{
app.UseExceptionHandler("/Home/Error");
}
app.UseStaticFiles();
app.UseSession();
app.UseMvc(routes =>
{
routes.MapRoute(
name: "default",
template: "{controller=Home}/{action=Index}/{id?}");
});
}
3、在MVC Controller里使用HttpContext.Session
从nuget安装Microsoft.AspNetCore.Mvc引用，直接使用自带的方法进行设置和获取session。不过自带的方法设置和获取的session值是byte[]类型的，可以从nuget安装并引用Microsoft.AspNetCore.Http并使用里面的扩展方法。
public class HomeController : Controller
{
public IActionResult Index()
{
HttpContext.Session.SetString("code", "123456");
return View();
}
public IActionResult About()
{
ViewBag.Code = HttpContext.Session.GetString("code");
return View();
}
}
public class SessionTestClass
{
private readonly IHttpContextAccessor _httpContextAccessor;
private ISession _session => _httpContextAccessor.HttpContext.Session;
public SomeOtherClass(IHttpContextAccessor httpContextAccessor)
{
_httpContextAccessor = httpContextAccessor;
}
public void Set()
{
_session.SetString("code", "123456");
}
public void Get()
{
string code = _session.GetString("code");
}
}
5、Isession的扩展 存储复杂对象
public static class SessionExtensions
{
public static void SetObjectAsJson(this ISession session, string key, object value)
{
session.SetString(key, JsonConvert.SerializeObject(value));
}
public static T GetObjectFromJson<T>(this ISession session, string key)
{
var value = session.GetString(key);
return value == null ? default(T) : JsonConvert.DeserializeObject<T>(value);
}
}
使用范例：
var myTestObject = new MyTestClass();
HttpContext.Session.SetObjectAsJson("SessionTest", myTestObject);
var myComplexObject = HttpContext.Session.GetObjectFromJson<MyClass>("SessionTest");
原文：https://www.cnblogs.com/siyunianhua/p/11493485.html