book.aspx.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
namespace 电子商务
{
    public partial class book : System.Web.UI.Page
    {
        SQLHelper db = new SQLHelper();
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                bind();
                //
                if (Session["zh"] == null)
                {
                    this.Panel00.Visible = false;
                }
                else
                {
                    this.lb_userid.Text = Session["zh"].ToString();
                }


            }
        }
        //
        public void bind()
        {
            int CurrentPage = Convert.ToInt32(this.lbt_now.Text);
            string sql = "select * from book where 1=1";
            sql = sql + " order by book_id desc";
            DataTable dt = db.ExecuteQuery(sql, CommandType.Text);
            //
            PagedDataSource ps = new PagedDataSource();//生成PagedDataSource的实例
            ps.DataSource = dt.DefaultView;
            ps.AllowPaging = true; //是否可以分页
            ps.PageSize = 9; //显示的数量
            ps.CurrentPageIndex = CurrentPage - 1; //取得当前页的页码
            this.lbt_first.Enabled = true;
            this.lbt_next.Enabled = true;
            this.lbt_pre.Enabled = true;
            this.lbt_last.Enabled = true;
            if (CurrentPage == 1)
            {
                this.lbt_first.Enabled = false;//不显示第一页按钮
                this.lbt_pre.Enabled = false;//不显示上一页按钮
            }
            if (CurrentPage == ps.PageCount)
            {
                this.lbt_next.Enabled = false;//不显示下一页
                this.lbt_last.Enabled = false;//不显示最后一页
            }
            this.lbt_count.Text = Convert.ToString(ps.PageCount);
            this.dt_list.DataSource = ps;