C#使用Cookie方法

代码Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->　//写入protected void Button1_Click(object sender, EventArgs e){HttpCookie cookie=new HttpCookie("MyCook");//初使化并设置Cookie的名称DateTime dt=DateTime.Now;TimeSpan ts = new TimeSpan(0, 0, 1,0,0);//过期时间为1分钟cookie.Expires = dt.Add(ts);//设置过期时间cookie.Values.Add("userid", "userid_value");cookie.Values.Add("userid2","userid2_value2");Response.AppendCookie(cookie);//输出该Cookie的所有内容//Response.Write(cookie.Value);//输出为：userid=userid_value&userid2=userid2_value2 
　　}//读取protected void Button2_Click(object sender, EventArgs e){// HttpCookie cokie = new HttpCookie("MyCook");//初使化if (Request.Cookies["MyCook"]!=null){//Response.Write("Cookie中键值为userid的值:" + Request.Cookies["MyCook"]["userid"]);//整行//Response.Write("Cookie中键值为userid2的值" + Request.Cookies["MyCook"]["userid2"]);Response.Write(Request.Cookies["MyCook"].Value);//输出全部的值
　　　　}}//修改Cookieprotected void Button3_Click(object sender, EventArgs e){//获取客户端的Cookie对象HttpCookie cok = Request.Cookies["MyCook"];if (cok != null){//修改Cookie的两种方法cok.Values["userid"] = "alter-value";cok.Values.Set("userid", "alter-value");//往Cookie里加入新的内容cok.Values.Set("newid", "newValue");Response.AppendCookie(cok);}      }//删除Cookieprotected void Button4_Click(object sender, EventArgs e){HttpCookie cok = Request.Cookies["MyCook"];if (cok != null){if (!CheckBox1.Checked){cok.Values.Remove("userid");//移除键值为userid的值
　　　　　　}else{TimeSpan ts = new TimeSpan(-1, 0, 0, 0);cok.Expires = DateTime.Now.Add(ts);//删除整个Cookie，只要把过期时间设置为现在
　　　　　　}Response.AppendCookie(cok);}}