如何使用Cookie

Question

我刚学asp.net，请问如何使用Cookie实现某一个用户登录后显示上次访问时间以及访问次数?麻烦写下关键代码，谢谢

Answer 1

   protected void Button1_Click(object sender, EventArgs e)
    {
        Response.Cookies["LastTime"].Value = DateTime.Now.ToString("yyyy-MM-dd hh:mm:ss");
        Response.Cookies["LastTime"].Expires = DateTime.Now.AddDays(60);
        int intTotTimes = 0;
        if (Request.Cookies["TotTimes"] != null)
        {
            intTotTimes = Convert.ToInt16(Request.Cookies["TotTimes"].Value); ;
        }
        intTotTimes = intTotTimes + 1;
        Response.Cookies["TotTimes"].Value = intTotTimes.ToString();
        Response.Cookies["TotTimes"].Expires = DateTime.Now.AddDays(60);    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        if (Request.Cookies["LastTime"] != null)
        {
            this.TextBox1.Text = Request.Cookies["LastTime"].Value;
        }
        if (Request.Cookies["TotTimes"] != null)
        {
            this.TextBox2.Text = Request.Cookies["TotTimes"].Value;
        }    }

Answer 2

给你发一个通用的方法。
  /// <summary>
        /// 写cookie值
        /// </summary>
        /// <param name="strName">名称</param>
        /// <param name="strValue">值</param>
        public static void WriteCookie(string strName, string strValue)
        {
            HttpCookie cookie = HttpContext.Current.Request.Cookies[strName];
            if (cookie == null)
            {
                cookie = new HttpCookie(strName);
            }
            cookie.Value = strValue;
            HttpContext.Current.Response.AppendCookie(cookie);        }        /// <summary>
        /// 写cookie值
        /// </summary>
        /// <param name="strName">名称</param>
        /// <param name="strValue">值</param>
        /// <param name="expires">过期时间(分钟)</param>
        public static void WriteCookie(string strName, string strValue, int expires)
        {
            HttpCookie cookie = HttpContext.Current.Request.Cookies[strName];
            if (cookie == null)
            {
                cookie = new HttpCookie(strName);
            }
            cookie.Value = strValue;
            cookie.Expires = DateTime.Now.AddMinutes(expires);
            HttpContext.Current.Response.AppendCookie(cookie);        }        /// <summary>
        /// 读cookie值
        /// </summary>
        /// <param name="strName">名称</param>
        /// <returns>cookie值</returns>
        public static string GetCookie(string strName)
        {
            if (HttpContext.Current.Request.Cookies != null && HttpContext.Current.Request.Cookies[strName] != null)
            {
                return HttpContext.Current.Request.Cookies[strName].Value.ToString();
            }            return "";
        }