vote.aspx.cs

在.net平台上运用C#开发完成的投票系统 可以实现多个项目的投票统计

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data .SqlClient;
namespace vote
{
	/// <summary>
	/// WebForm1 的摘要说明。
	/// </summary>
	public class WebForm1 : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Button btnVote;
		protected System.Web.UI.WebControls.Button btnResult;
		protected System.Web.UI.WebControls.Label lblTitle;
		protected System.Web.UI.WebControls.RadioButtonList rBtnItems;
	    private String voteID="2";
		private void Page_Load(object sender, System.EventArgs e)
		{
		if(!this.IsPostBack)
		{//建立连接
		SqlConnection con=DB.createConnection();
		con.Open();
		//查询项目标题
		SqlCommand cmd=new SqlCommand("select voteTitle from voteMaster where voteID="+this.voteID,con);
		String title=Convert.ToString(cmd.ExecuteScalar());
		this.lblTitle.Text =title;
		//查询相应的投票条目
        SqlCommand cmdItem=new SqlCommand("select voteDetailsID,voteItem from voteDetails where voteID="+this.voteID,con);
		SqlDataReader sdr=cmdItem.ExecuteReader();
		this.rBtnItems.DataSource=sdr;
		this.rBtnItems.DataTextField="voteItem";
		this.rBtnItems.DataValueField="voteDetailsID";
		this.rBtnItems.DataBind();
		sdr.Close();
		con.Close();


				}
			// 在此处放置用户代码以初始化页面
		}

		#region Web 窗体设计器生成的代码
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{    
			this.btnVote.Click += new System.EventHandler(this.btnVote_Click);
			this.btnResult.Click += new System.EventHandler(this.btnResult_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void rBtnItems_SelectedIndexChanged(object sender, System.EventArgs e)
		{
		
		}

		private void btnVote_Click(object sender, System.EventArgs e)
		{
			SqlConnection con=DB.createConnection();
			con.Open();
			SqlCommand cmd=new SqlCommand ("update voteDetails set voteNum=voteNum+1 where voteID="+voteID+"and voteDetailsID="+this.rBtnItems.SelectedValue.ToString(),con);
			cmd.ExecuteNonQuery();
			con.Close();

		}

		private void btnResult_Click(object sender, System.EventArgs e)
		{
		SqlConnection con=DB.createConnection();
		con.Open();
		SqlCommand cmd=new SqlCommand("select * from voteDetails where voteID="+voteID,con);
		SqlDataReader sdr=cmd.ExecuteReader();
			while(sdr.Read ())
			{
				Response.Write("<font size=15>"+sdr.GetString(2)+"-----"+sdr.GetInt32(3).ToString()+"</font><br>");
			}
		}
	}
}