原因分析:
服务器开启了Https时,cookie的Secure属性应设为true;
解决办法:
1.服务器配置Https SSL方式,参考:https://support.microsoft.com/kb/324069/zh-cn
2.修改web.config,添加:
<system.web>
<httpCookies httpOnlyCookies="true" requireSSL="true" />
<system.web>
<httpCookies httpOnlyCookies="true" requireSSL="true" />
<system.web>
3.修改后台写Cookies时的设置 cookie.Secure = true: