.net 添加Cookie的4种方法

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//第一种添加Cookie方法
        HttpCookie myCookie = new HttpCookie("userrole");
        myCookie.Values["a"] = "a";
        myCookie.Values[""] = "b";
        myCookie.Expires.AddDays(1);
        Response.Cookies.Add(myCookie);
        //Response.AppendCookie(mycookie);这个也可以添加
        //第一种获取Cookie方法
        Response.Write(Request.Cookies["userrole"].Values["a"].ToString());

        //第二种添加Cookie方法
        HttpCookie myCookie = new HttpCookie("userrole");
        myCookie.Values["a"] = "a";
        myCookie.Values["b"] = "b";
        myCookie.Expires.AddDays(1);
        Response.Cookies.Add(myCookie);
        //第二种读取Cookie方法
        HttpCookie cookie = Request.Cookies["userrole"];
        Response.Write(cookie.Values["a"].ToString());
        Response.Write(cookie.Values["b"].ToString());

        //第三种添加Cookie方法
        HttpCookie myCookie = new HttpCookie("userrole");
        myCookie.Value = "a";
        Response.Cookies.Add(myCookie);
        //第三种读取Cookie方法
        Response.Write(Request.Cookies["userrole"].Value);

        //第四种添加Cookie方法
        HttpContext.Current.Response.Cookies.Add(new HttpCookie("userrole", "超级管理员"));
        Response.Cookies["userrole"].Value = "超级管理员";
        HttpCookie cookie = Request.Cookies["userrole"];
        Response.Write(cookie.Value);
        //第三种读取Cookie方法
        Response.Write(Request.Cookies["userrole"].Value);