vote.aspx.cs

为达到最佳效果

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

public partial class Vote : System.Web.UI.Page
{
    public string strContent, strID = null;
    protected void Page_Load(object sender, EventArgs e)
    {
        strID = Request["ID"].ToString();

        HttpCookie readcookie = Request.Cookies["Vote"];

        if (readcookie == null)
        {
            this.labState.Text = "你还未在该投票系统中投票！";
        }
        else
        {
            this.labState.Text = "你已经在该投票系统投过票了！";
        }
		SqlData da = new SqlData();
        SqlDataReader dr = da.ExceRead("select * from tb_Vote where ID='" + strID + "'") ;
        dr.Read();
        this.labContent.Text = dr["Title"].ToString();
        strContent = dr["Content"].ToString();
        string[] str = strContent.Split('|');
        int intORDER = 0;//排序
        if (!Page.IsPostBack)//有提交行为，不执行以下数据的重载
        {
			foreach (string strContentIN in str)
			{
				string strContentOK = strContentIN.Split(',')[1];
				this.RadioButtonList1.Items.Add(new ListItem(strContentOK, intORDER.ToString()));
				intORDER++;//累加选项的值
			}
        }	
    }


    protected void btnVote_Click(object sender, EventArgs e)
    {
        if (this.RadioButtonList1.SelectedIndex != -1)//如果有选定项目
        {
            //投票防作弊
            HttpCookie makecookie = new HttpCookie("Vote");//制造cookie
            HttpCookie readcookie = Request.Cookies["Vote"];//读出cookie

            if (readcookie == null)//从未投过票
            {
                makecookie.Values.Add("VoteItem", "<" + strID + ">");
            }
            else
            {
                //Response.Write(readcookie.Values["VoteItem"]);
                //Response.End();
                string strAllItem = readcookie.Values["VoteItem"].ToString();//读取已投票的项
                if (strAllItem.IndexOf("<" + strID + ">") == -1)//未投过票
                {
                    makecookie.Values.Add("VoteItem", readcookie.Values["VoteItem"] + "<" + strID + ">");
                }
                else//如果已投过票
                {
                    Response.Write("<script language=javascript>alert('该主题你已经成功投过票，不能重新投票！');</script>");
                    return;
                    //Response.Write("<script language=javascript>alert('该主题你已经成功投过票，不能重新投票！');location='Index.aspx'</script>");
                }
            }
            Response.AppendCookie(makecookie);//写入Cookie

            string strSelect = strContent.Split('|')[Convert.ToInt32(this.RadioButtonList1.SelectedValue.ToString())];//当前选中的项目，如“ 2,不错”
            int intVote = Convert.ToInt32(strSelect.Split(',')[0]);//当前投票数+1
            int intVoteOK = intVote + 1;
            string strSelectOK = strSelect.Replace(intVote.ToString(), intVoteOK.ToString());//更新原投票数，所以期望更新的定位精确，可附带+","
            string strUPDATE = strContent.Replace(strSelect, strSelectOK);//得到最终
            SqlData da = new SqlData();
            bool update = da.ExceSQL("update tb_Vote set Content='" + strUPDATE + "' where ID='" + strID + "'");
            if (update)
			{
				Response.Write("<script language=javascript>alert('投票成功！');</script>");
			}
			else
			{
                Response.Redirect("Index.aspx");
			}
        }
        else//如果没有选中项目
        {
			Response.Write("<script language=javascript>alert('请选择投票项！');location='javascript:history.go(-1)'</script>");
        }
    }
    protected void btnEdit_Click(object sender, EventArgs e)
    {
        Response.Redirect("Login.aspx?ID="+Request["ID"]+"");
    }
    protected void btnView_Click(object sender, EventArgs e)
    {
        Response.Redirect("Result.aspx?ID=" + Request["ID"] + "");
    }
}