ASP.NET学习之页面传值(7)_Cookie传值

【关键点：
1、创建一个Cookie对象
2、在对象中封装要传输的数据【可以创建一个cookie对象，往里面添加多个键值对，也可以创建多个Cookie，每一个Cookie中存放一个键值对】
3、设置cookies过期的时间
4、将Cookies对象添加到Response.cookies中
5、页面跳转
【注意：在接收数据时，一定要做判空判断】
】
IndexPage.aspx页面
<form runat="server">
        <div>
            <input id="Text1" type="text" runat="server"/>
            <input id="Text2" type="text" runat="server"/>
            <input id="Button1" value="传值" type="button" runat="server" onserverclick="ok_ServerClick"/>
        </div>
</form>

IndexPage.aspx.cs后台代码:
public void ok_ServerClick(object sender, EventArgs e)
        {
            //给变量赋值
            string name = Text1.Value;
            string pass = Text2.Value;
            
            #region 单值传递
            ////创建一个Cookie对象
            //HttpCookie Namecookie = new HttpCookie("Name", name);
            //HttpCookie Passcookie = new HttpCookie("Pass", pass);
            ////将Cookie对象添加到Cookies集合中
            //Response.Cookies.Add(Namecookie);
            //Response.Cookies.Add(Passcookie); 
            #endregion

            #region 多值传递
            //多值传递
            HttpCookie cookies = new HttpCookie("Login");
            //要传输的数据的封装【方法一】
            //cookies.Values.Add("Name", name);
            //cookies.Values.Add("Pass", pass);
            //要传输的数据的封装【方法二】
            cookies.Values["Name"] = name;
            cookies.Values["Pass"] = pass;
            cookies.Expires = DateTime.MaxValue;  //设置Cookie的过期的时间
            Response.Cookies.Add(cookies); //将Cookie集合存放到Cookies中【必须要有，不然接收时，Cookies取不到值】
            #endregion
            //页面跳转
            Response.Redirect("ResultIndex.aspx");
        }
ResultPage.aspx.cs后台代码:
 protected void Page_Load(object sender, EventArgs e)
        {
            #region Cookie单值接收
            //HttpCookie NameCookie = Request.Cookies["Name"];
            //string name = NameCookie.Value;
            //HttpCookie PassCookie = Request.Cookies["Pass"];
            //string pass = PassCookie.Value; 
            #endregion

            if (Request.Cookies["Login"]!=null)
            {
               //获得数据方法一：
                HttpCookie cookie = Request.Cookies["Login"];
                string name = cookie["Name"];
                string pass = cookie["Pass"];
                //获得数据方法二：
                //string name = cookie.Value;  //获得Name=key1&Pass=key2
                //string name = Request.Cookies["Login"]["Name"];
                //string pass = Request.Cookies["Login"]["Pass"];
                txt.Value = "用户名：" + name + "-----密码：" + pass;
            }
        }
多值Cookie的写法：
http://www.cnblogs.com/abllyboy/archive/2010/11/29/1891395.html
http://blog.csdn.net/dingzhenyang/article/details/5704582