Cookie的创建、读取、删除

创建Cookie:

HttpCookie cookie = new HttpCookie(COOKIE_NAME_FOR_USER);
cookie.Expires = DateTime.Now.AddYears(1);//设置日期
cookie[COOKIE_USER_NAME] = "用户名";
System.Web.HttpContext.Current.Response.Cookies.Add(cookie);

读取Cookie:

HttpCookie cookie = System.Web.HttpContext.Current.Request.Cookies.Get(COOKIE_NAME_FOR_USER);

删除Cookie：

System.Web.HttpContext.Current.Request.Cookies.Remove(COOKIE_NAME_FOR_USER)

另外，判断是否有cookie可以直接使用取的cookie和null进行比较，如果取出来非null就说明不为空

另外在一般处理程序中的使用方法：

//写入cookie
HttpCookie hc = new HttpCookie("time");
hc.Value = DateTime.Now.ToString();
hc.Expires = DateTime.Now.AddDays(7);
context.Response.Cookies.Add(hc);

//读取Cookie
HttpCookie hc = context.Request.Cookies["time"];

        if (hc != null)

        {

            context.Response.Write(hc.Value);

        }

        else

        {

            context.Response.Write("meiyou ");

        }

//删除cookie 就是把cookie设置过期输出
int count = context.Request.Cookies.Count;

for (int i = 0; i < count; i++)
{
HttpCookie hc = context.Request.Cookies[i];
hc.Expires = DateTime.Now.AddDays(-1); //设置过期
context.Response.Cookies.Add(hc);
}

巴特西

Cookie的创建、读取、删除

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