投票系统（带柱状图）

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;

public partial class VoteResult : System.Web.UI.Page
{
float poll1ratio = 0f;
float poll2ratio = 0f;
float poll3ratio = 0f;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
string id = Session["id"].ToString();
int result = int.Parse(Request.QueryString["result"].ToString());
DataHandle handle = new DataHandle();
DataTable table = handle.GetVote(id).Tables[0];
lblTitle.InnerText = table.Rows[0][0].ToString();
lblItem1.InnerText = table.Rows[0][1].ToString();
lblItem2.InnerText = table.Rows[0][2].ToString();
lblItem3.InnerText = table.Rows[0][3].ToString();

DataTable tableResult = handle.GetVoteResult(id).Tables[0];
int poll1 = int.Parse(tableResult.Rows[0][0].ToString());
int poll2 = int.Parse(tableResult.Rows[0][1].ToString());
int poll3 = int.Parse(tableResult.Rows[0][2].ToString());

switch (result)
{
case 0:
poll1++;
handle.UpdataVoteResult(id, poll1, 0);
break;

case 1:
poll2++;
handle.UpdataVoteResult(id, poll2, 1);
break;

case 2:
poll3++;
handle.UpdataVoteResult(id, poll3, 2);
break;
}

int pollSum = poll1 + poll2 + poll3;
poll1ratio = Convert.ToSingle((float)poll1 / pollSum);
lblResult1.InnerText = Math.Round((poll1ratio * 100), 2).ToString() + "%";
poll2ratio = Convert.ToSingle((float)poll2 / pollSum);
lblResult2.InnerText = Math.Round((poll2ratio * 100), 2).ToString() + "%";
poll3ratio = Convert.ToSingle((float)poll3 / pollSum);
lblResult3.InnerText = Math.Round((poll3ratio * 100), 2).ToString() + "%";

img1.Width = (int)(poll1ratio * 100);
img2.Width = (int)(poll2ratio * 100);
img3.Width = (int)(poll3ratio * 100);
lblTotal.InnerText = pollSum.ToString();
}
}
}