itemmanage.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>
	/// ItemManage 的摘要说明。
	/// </summary>
	public class ItemManage : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.ListBox ItemList;
		protected System.Web.UI.WebControls.TextBox ItemName;
		protected System.Web.UI.WebControls.Button AddItem;
		protected System.Web.UI.WebControls.ImageButton deleteBtn;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			if(!Page.IsPostBack)
			{
				BindVoteListData();
			}

			deleteBtn.Attributes.Add("onclick","return confirm('你确定要删除所选择的数据项吗?');");
		}

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

			ItemList.DataTextField = "Item";
			ItemList.DataValueField = "VoteID";
			ItemList.DataSource = recv;
			ItemList.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.deleteBtn.Click += new System.Web.UI.ImageClickEventHandler(this.deleteBtn_Click);
			this.AddItem.Click += new System.EventHandler(this.AddItem_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void AddItem_Click(object sender, System.EventArgs e)
		{
			VoteDB vote = new VoteDB();
			if(ItemName.Text.Length > 0)
			{
				vote.AddVote(ItemName.Text.Trim());
				BindVoteListData();
			}
		}

		private void deleteBtn_Click(object sender, System.Web.UI.ImageClickEventArgs e)
		{
			if(ItemList.SelectedIndex > -1)
			{
				VoteDB vote = new VoteDB();
				vote.DeleteVote(Int32.Parse(ItemList.SelectedValue));
				BindVoteListData();
			}
		}
	}
}