productslist.aspx.cs

手机网店源码

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 MobileOnlineShop.DAL;

namespace MobileOnlineShop
{
	/// <summary>
	/// productslist 的摘要说明。
	/// </summary>
	public class productslist : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.DataList MyList;
		protected System.Web.UI.WebControls.Label lblPageCount;

		protected System.Web.UI.WebControls.LinkButton m_lkbtnPrePage;
		protected System.Web.UI.WebControls.LinkButton m_lkbtnNextPage;

		protected System.Web.UI.WebControls.DropDownList m_ddlPageIndex;

		//专用明全局变量
		private int pageSize,recorderCount,currentPage,pageCount;
		protected System.Web.UI.WebControls.Label message;
		//类型ID
		private int categoryId;

		private void Page_Load(object sender, System.EventArgs e)
		{
			//每页记录数
			pageSize = 12;
			//品牌ID
			categoryId = Convert.ToInt32(Request.Params["CategoryID"]);

			if (!IsPostBack)
			{
				//调用数据访问层方法，计算记录条数
				recorderCount = ProductDB.RecorderCalculate(categoryId);

				//页数
				if((float)recorderCount/pageSize == recorderCount/pageSize)
					pageCount = recorderCount/pageSize;
				else
					pageCount = recorderCount/pageSize+1;

				this.lblPageCount.Text = pageCount.ToString();
				ViewState["PageCount"] = pageCount;
				
				currentPage = 1;
				ViewState["PageIndex"] = currentPage;
				BindList();
			}
			if(MyList.Items.Count==0)
			{
				MyList.Visible = false;
				message.Text = "无结果";
			}
		}

		public void BindList()
		{
			this.m_lkbtnPrePage.Enabled = true;
			this.m_lkbtnNextPage.Enabled = true;
			pageCount = (int)ViewState["PageCount"];
			
			//清空m_ddlPageIndex
			this.m_ddlPageIndex.Items.Clear();

			for(int i=1;i<=pageCount;i++)
				this.m_ddlPageIndex.Items.Add(i.ToString());
			// 调用数据访问层方法，将返回结果与DataList绑定,并分页
			MyList.DataSource = ProductDB.GetProducts(categoryId,currentPage,pageSize);
			MyList.DataBind();

			if (currentPage == 1)
			{
				this.m_lkbtnPrePage.Enabled = false;
			}
			if (currentPage == pageCount || pageCount == 0)
			{
				this.m_lkbtnNextPage.Enabled = false;
			}
//			ViewState["PageIndex"] = currentPage;

			this.m_ddlPageIndex.SelectedIndex = currentPage-1;
		}

		#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.m_ddlPageIndex.SelectedIndexChanged += new System.EventHandler(this.m_ddlPageIndex_SelectedIndexChanged);
			this.m_lkbtnPrePage.Click += new System.EventHandler(this.lkbPrePage_Click);
			this.m_lkbtnNextPage.Click += new System.EventHandler(this.lkbNextPage_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void lkbPrePage_Click(object sender, System.EventArgs e)
		{
			currentPage = (int)ViewState["PageIndex"];
			if ( currentPage >1)
			{
				currentPage--;
				ViewState["PageIndex"] = currentPage;
			}
			BindList();
		}

		private void lkbNextPage_Click(object sender, System.EventArgs e)
		{
			currentPage = (int)ViewState["PageIndex"];
			pageCount = (int)ViewState["PageCount"];
			if ( currentPage < pageCount)
			{
				currentPage++;
				ViewState["PageIndex"] = currentPage;	
			}
			BindList();
		}

		private void m_ddlPageIndex_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			currentPage = Int32.Parse(this.m_ddlPageIndex.SelectedValue);
			BindList();
		}
 
	}
}