/// <summary>
???/// ** 描述：Cookie for .net core2.1
???/// ** 创始时间：2018-11-19
???/// ** 修改时间：-
???/// ** 作者：lc
???/// </summary>
???public static class CookieHelper
???{
???????/// <summary>
???????/// 设置本地cookie
???????/// </summary>
???????/// <param name="key">键</param>
???????/// <param name="value">值</param> ?
???????/// <param name="minutes">过期时长，单位：分钟</param> ?????
???????public static void SetCookies(string key, string value, int minutes = 30)
???????{
???????????HttpContext.Current.Response.Cookies.Append(key, value, new CookieOptions
???????????{
???????????????Expires = DateTime.Now.AddMinutes(minutes),
???????????????HttpOnly = true,// 设置为后台只读模式,前端无法通过JS来获取cookie值,可以有效的防止XXS攻击
???????????????Secure = true,//采用安全模式来传递cookie,如果设置为true,就是当你的网站开启了SSL(就是https),的时候,这个cookie值才会被传递
???????????????IsEssential = true//是否强制存储cookie,注意,这里的强制 是针对于上面所讲的内容的..也就是当用户不同意使用cookie的时候,你也可以通过设置这个属性为true把cookie强制存储.
???????????????// MaxAge cookie的有效毫秒数,
???????????????//如果设置为负值的话，则为浏览器进程Cookie(内存中保存)，关闭浏览器就失效；如果设置为0，则立即删除该Cookie。
???????????});
???????}
???????/// <summary>
???????/// 删除指定的cookie
???????/// </summary>
???????/// <param name="key">键</param>
???????public static void DeleteCookies(string key)
???????{
???????????HttpContext.Current.Response.Cookies.Delete(key);
???????}
???????/// <summary>
???????/// 获取cookies
???????/// </summary>
???????/// <param name="key">键</param>
???????/// <returns>返回对应的值</returns>
???????public static string GetCookies(string key)
???????{
???????????HttpContext.Current.Request.Cookies.TryGetValue(key, out string value);
???????????if (string.IsNullOrEmpty(value))
???????????????value = string.Empty;
???????????return value;
???????}
???}
.net core2.1 ??CookieHelper
原文地址：https://www.cnblogs.com/LiChen19951127/p/10054489.html