//投票    PRotected void btn_Vote_Click(object sender, EventArgs e)    {        string useripAddress = Request.UserHostAddress.ToString();//获取用户本地的IP地址        HttpCookie oldCookie=Request.Cookies["UserIP"];//创建Cookie对象        if (oldCookie == null)//该用户没有投票记录        {            int flag = this.rbl_Evaluate.SelectedIndex;//获取用户投票的选项            switch (flag)            {                case 0: AddCount(Server.MapPath("Result1.txt")); break;                case 1: AddCount(Server.MapPath("Result2.txt")); break;                case 2: AddCount(Server.MapPath("Result3.txt")); break;                default:                    break;            }            Page.RegisterClientScriptBlock("", "<script>alert('投票成功，谢谢您的参与')<script>");            HttpCookie newCookie = new HttpCookie("UserIP");//创建新的Cookie对象            newCookie.Expires = DateTime.MaxValue;//设置Cookie的有效时间            newCookie.Values.Add("IPAddress", userIpAddress);//添加用户的IP地址在Cookie中，保存起来            Response.AppendCookie(newCookie);//将变量写入Cookie文件中        }        else        {            string userOldAddress = oldCookie.Values["IPAddress"].ToString();            if (userIpAddress.Trim() == userOldAddress.Trim())//创建Cookie对象            {                Page.RegisterClientScriptBlock("", "<script>alert('每天只能投票一次，谢谢您的光顾！！')</script>");            }            else            {                HttpCookie newCookie = new HttpCookie("UserIP");//创建新的Cookie对象                newCookie.Values.Add("IpAddress", userIpAddress);                newCookie.Expires = DateTime.MaxValue;                Response.AppendCookie(newCookie);                int flag = this.rbl_Evaluate.SelectedIndex;                switch (flag)                {                    case 0: AddCount(Server.MapPath("Result1.txt")); break;                    case 1: AddCount(Server.MapPath("Result2.txt")); break;                    case 2: AddCount(Server.MapPath("Result3.txt")); break;                    default:                        break;                }                Page.RegisterClientScriptBlock("", "<script>alert('投票成功谢谢您的参与')</script>");            }        }    }    

    /// <summary>    /// 读取文本文件中的数字    /// </summary>    /// <param name="str_path">文本文件的路径</param>    /// <returns>返回结果</returns>    protected static int ReadCount(string str_path)    {        int count = 0;//创建整形的变量        System.IO.StreamReader srd;//创建流读取对象        srd = System.IO.File.OpenText(str_path);//打开指定的文本文件        if (srd.Peek()!=-1)//如果有数据        {            count = int.Parse(srd.ReadLine());//读取文本文件的数字赋值给count        }        srd.Close();//关闭流对象        return count;      }

    /// <summary>    /// 对现有的投票数进行增加    /// </summary>    /// <param name="str_path">文本文件的路径</param>    protected static void AddCount(string str_path)    {        int count = ReadCount(str_path);        count += 1;        System.IO.StreamWriter swr = new System.IO.StreamWriter(str_path);//将数据的记录写入文件        swr.WriteLine(count);        swr.Close();    }