asp.net cookies 读取、写入、修改、删除

protected void Button2_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cookie：

protected void Button1_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cookie：

protected 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cookie：

protected 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);
}
}