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Cookie,你怎么看?

Cookie

近日饿习管理状态中,浅尝阶段。革命在继续,更新repeat中!!

//写入Cookie

protected void Button1_Click(object sender, EventArgs e)
    {
        HttpCookie cok = new HttpCookie("CaseInfo");//定创建名为CaseInfo的cookies子集cok;
        cok.Values.Add("key1", "小虾");//给一个cookie添加多个键/值对;
        cok.Values.Add("key2", "大虾");//等同于: cok[“key2”]=”大虾“;
        cok.Expires = Now.AddDays(2);//设置作用时间
        Response.AppendCookie(cok);
    }

①取出cok对象的值:
HttpCookie cok = Request.Cookies["CaseInfo"];
string cookieValue = cok.Value;
②取出键对应的值:
HttpCookie cok = Request.Cookies["CaseInfo"];
string val1 = cookies.Values["key1"];
string val2 = cookies.Values["key2"];
③关于将该Cookie添加到Cookies集合中:
—— Response.Cookies.Add(cok)方法:
—— Response.AppendCookie(cok)方法:
听说没什么大的区别(°Д°),不过听说add()有更多的重载方法:
如Cookies.Add(strPath, strName, strValue, [bPersist])

 

   //删除cookie其中一个属性(键值对):<cookieVar>.Values.Remove()

    protected void Button2_Click(object sender, EventArgs e)
    {
        HttpCookie cok = Request.Cookies["CaseInfo"];
        if (cok != null)
        {
            cok.Values.Remove("key1");
            Response.AppendCookie(cok);
        }
    }

跑题小Tips: 事件的修饰符都用protected(当然public也行,但不安全),主要原因是aspx页面(inherit=JuSNS.Web.Default)是继承aspx.cs页面(public partial class Default)的。设置为protected修饰符,才能在子类中访问父类。

    //删除整个Cookie(设置过期时间):<cookieVar>.Expires=DateTime.Now.AddDay(-1);

  protected void Button3_Click(object sender, EventArgs e)
    {
        HttpCookie cok = Request.Cookies["CaseInfo"];
        cok.Expires = DateTime.Now.AddDays(-1);
        Response.AppendCookie(cok);
    }

    //读取Cookie

  protected void Button5_Click(object sender, EventArgs e)
    {
        if (Request.Cookies["CaseInfo"] != null)
        {
            string temp = Convert.ToString(Request.Cookies["CaseInfo"].Values["key1"]) + "   " + Convert.ToString(Request.Cookies["CaseInfo"].Values["key2"]);//原来Convert.ToString()的参数还可以这么搞!
            if (!string.IsNullOrEmpty(temp))
            {
                Response.Write(temp);
            }
            else
            {
                Response.Write("字符串为空");
            }
        }
        else
        {
            Response.Write("为空");
        }
    }

获取一个cookie对象的某键对应的值: Request.Cookies["CaseInfo"].Values("key1");
用一个string类型的对象temp储存该值,通过判断temp

string.IsNullOrEmpty()方法用于判断字符串是否为"空字符串或无值"。

posted @ 2012-11-14 20:55  庄丶大虾  阅读(379)  评论(0编辑  收藏  举报