LyList.aspx.cs

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using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
public partial class LyList : System.Web.UI.Page
{
    DBClass db = new DBClass();
    private SqlConnection con = new SqlConnection();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            DandData();//绑定数据
        }
    }
    //为下拉列表添加选择项
    private void getListItem()
    {
        for (int i = 0; i < Convert.ToInt32(DBClass.Num); i++)
        {
            this.DropDownList1.Items.Add(Convert.ToString(Convert.ToInt32(i) + 1));
        }
    }
    //绑定数据
    public void DandData()
    {
        this.DropDownList1.Items.Clear();
        this.getListItem();   //向下拉列表中添加分页数

        int currPage = Convert.ToInt32(this.Label1.Text);

        con = db.GetConnection();
        SqlDataAdapter da = new SqlDataAdapter();
        da.SelectCommand = new SqlCommand("select * from liuyan order by id desc", con);
        DataSet ds = new DataSet();
        da.Fill(ds, "liuyan");

        PagedDataSource pds = new PagedDataSource(); //对用于分页的类的引用
        pds.DataSource = ds.Tables["liuyan"].DefaultView;//设置数据源(DataSet类型)
        pds.AllowPaging = true;

        pds.PageSize = 3;   //指定每页显示几条记录
        pds.CurrentPageIndex = currPage - 1;    //获取当前页索引后转到索引页

        if (currPage == 1)
        {
            this.Button1.Enabled = false;
            this.Button2.Enabled = false;
        }
        else
        {
            this.Button1.Enabled = true;
            this.Button2.Enabled = true;