如何在ASP.NET Core MVC上正确设置Cookie的展示日期时间 [英] How to correctly set exparation datetime for cookies on ASP.NET Core MVC

问题描述

我正在尝试从后端(Asp.Net核心)向浏览器设置Cookie，该Cookie应该在第二天的同一时间减去5分钟后过期.这是来自控制器

I'm trying to set a Cookie to the browser from back-end (Asp.Net core) which should expire on the next day same time minus 5 minutes. Here is the C# code from controller

HttpContext.Response.Cookies.Append("MyCookie",
       "test cookie value",
       new Microsoft.AspNetCore.Http.CookieOptions
       {
             Expires = DateTimeOffset.UtcNow.AddDays(1).AddMinutes(-5)
       });

但是对于浏览器，它的到期日期错误.

But to the browser it is coming with wrong expiration Datetime.

例如，如果Cookie的到期日期设置为2016-09-28 19:15，则在浏览器上它将在2016-09-29T17:15到期，并且少了2个小时，这很奇怪，因为我的TimeZone是+1.

For example if cookie expiration date was set to 2016-09-28 19:15, on the browser it will expire at 2016-09-29T17:15, and it is 2 hours less, which is weird because my TimeZone is +1.

推荐答案

DateTimeOffset.UtcNow是DateTimeOffset.Now + yourTimezone.

DateTimeOffset.UtcNow is DateTimeOffset.Now + yourTimezone.

所以

DateTimeOffset.UtcNow.AddDays(1).AddMinutes(-5)

将返回与

DateTimeOffset.Now.AddDays(1).AddMinutes(-5).AddHours(-2 /*your Timezone*/)

浏览器显示一切正常.

Browser showed everything right.

将代码更改为

HttpContext.Response.Cookies.Append("MyCookie",
   "test cookie value",
   new Microsoft.AspNetCore.Http.CookieOptions
   {
         Expires = DateTimeOffset.Now.AddDays(1).AddMinutes(-5)
   });
//if you want to have the same expiration date as your server's

或使用UtcNow +客户的时区

or use UtcNow + client's timezone

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