vote.aspx.cs

实现投票功能

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>
	/// vote 的摘要说明。
	/// </summary>
	public class vote : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Button Button1;
		protected System.Web.UI.WebControls.Button Button2;
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.WebControls.RadioButtonList rd;
		private string voteid="2";
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			if(!this.IsPostBack)
			{
			  SqlConnection cn=db.createcon();
				cn.Open();
				SqlCommand cmd=new SqlCommand("select votename from voteitem where voteid="+this.voteid+"",cn);
				
				string tt=Convert.ToString(cmd.ExecuteScalar());
				this.Label1.Text=tt;
				SqlCommand cm=new SqlCommand("select voteitem,dateilid from votedateil where voteid="+this.voteid+"",cn);
			
                SqlDataReader dr=cm.ExecuteReader();
				this.rd.DataSource=dr;
				this.rd.DataTextField="voteitem";
				this.rd.DataValueField="dateilid";
				this.rd.DataBind();
				dr.Close();
				cn.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.Button1.Click += new System.EventHandler(this.Button1_Click);
			this.Button2.Click += new System.EventHandler(this.Button2_Click);
			this.rd.SelectedIndexChanged += new System.EventHandler(this.RadioButtonList1_SelectedIndexChanged);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void RadioButtonList1_SelectedIndexChanged(object sender, System.EventArgs e)
		{
		
		}

		private void Button1_Click(object sender, System.EventArgs e)
		{
		SqlConnection cn=db.createcon();
			cn.Open();
			SqlCommand cmd=new SqlCommand("update votedateil set num=num+1 where dateilid="+this.rd.SelectedValue+" and voteid="+this.voteid+"",cn);
			cmd.ExecuteNonQuery();
			cn.Close();
		}

		private void Button2_Click(object sender, System.EventArgs e)
		{
			
              Response.Redirect("show.aspx?voteid="+this.voteid+"");

		}
	}
}