一、创建、读取具有多个键值对的cookie

1、创建

   （1）HttpCookie hc=new HttpCookie("visitor");
          hc.Values["username"]=this.TextBox1.Text;
          hc.Values["userpassword"]=this.TextBox2.Text;
          hc.Expires=DateTime.Now.AddDays(1);
   （2）Response.Cookies.Add(hc);
          Response.Cookies["visitor"]["username"]=this.TextBox1.Text;
          Response.Cookies["visitor"]["password"]=this.TextBox2.Text;
          Response.Cookies["visitor"].Expires=DateTime.Now.AddDays(1);

2、读取

    （1）

          HttpCookie hc=Request.Cookies["visitor"];

          if(hc.haskeys)

           {Response.Write("the username :"+hc.Values["username"].ToString());
           Response.Write("the password :"+hc.Values["userpassword"].ToString());

           }
   (2)if(Request.Cookies["visitor"].HasKeys)
   {
    System.Collections.Specialized.NameValueCollection userinfo=new System.Collections.Specialized.NameValueCollection();
    userinfo=Request.Cookies["visitor"].Values;
    Response.Write("the username :"+userinfo["username"].ToString());
    Response.Write("the password :"+userinfo["userpassword"].ToString());
   }