ASP.NET 小题目 通过Session对象保存用户访问页面的次数，并设置Session对象保存数据的有效时间

protected void Page_Load(object sender, EventArgs e)
{
if (Request.Cookies["MyCook"] != null)// 获取cookie并修改访问次数
{
HttpCookie cookie = Request.Cookies["MyCook"];
string times = cookie["VisitTimes"];
ScriptManager.RegisterClientScriptBlock(this, typeof(Page), "info", "alert('这是您第" + times + "次光临！');", true);
string newtimes = (Convert.ToInt32(times) + 1).ToString();
cookie.Values["VisitTimes"] = newtimes;
Response.SetCookie(cookie);
}
else // 第一次访问时创建cookie
{
HttpCookie cookie = new HttpCookie("MyCook");
cookie.Expires = DateTime.Now.AddMinutes(10);//过期时间为10分钟
cookie.Values.Add("VisitTimes","1");
ScriptManager.RegisterClientScriptBlock(this, typeof(Page), "info", "alert('这是您第1次光临！');", true);
Response.SetCookie(cookie);
}
}