webvote.aspx.cs

ASP C#代码实例 适合初学人士学习使用

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 Example_10_4
{
	/// <summary>
	/// WebVote 的摘要说明。
	/// </summary>
	public class WebVote : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Button VoteBtn;
		protected System.Web.UI.WebControls.Button ShowVote;
		protected System.Web.UI.WebControls.Label VoteMessage;
		protected System.Web.UI.WebControls.DataGrid VoteList;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			if(!Page.IsPostBack)
			{
				BindVoteListData();
				VoteMessage.Visible = false;
			}
		}

		private void BindVoteListData()
		{
			VoteDB vote = new VoteDB();
			SqlDataReader recv = vote.GetVotes();

			VoteList.DataSource = recv;
			VoteList.DataBind();

			recv.Close();
		}

		#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.VoteBtn.Click += new System.EventHandler(this.VoteBtn_Click);
			this.ShowVote.Click += new System.EventHandler(this.ShowVote_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void VoteBtn_Click(object sender, System.EventArgs e)
		{
			VoteDB vote = new VoteDB();
			foreach(DataGridItem item in VoteList.Items)
			{
				CheckBox check = (CheckBox)item.FindControl("VoteCheck");
				if(check != null)
				{
					if(check.Checked == true)
					{
						vote.UpdateVote(Int32.Parse(VoteList.DataKeys[item.ItemIndex].ToString()));
						VoteMessage.Visible = true;
					}
				}
			}
		}

		private void ShowVote_Click(object sender, System.EventArgs e)
		{
			Response.Redirect("~/ShowVote.aspx");
		}
	}
}