booklist.ascx.cs

在线图书馆

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;

public partial class MyDefine_MessageList : System.Web.UI.UserControl
{
    private int _Count;
    public int InfoNum
    {
        get { return _Count; }
        set { _Count = value; }
    }
    private int _PageSize;
    public int PageSizeNum
    {
        get { return _PageSize; }
        set { _PageSize = value; }
    }
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            LabelPageNo.Text = "1";
            BindToDLBookList();
        }
    }

    private void BindToDLBookList()
    {
        DataSet ds = new DataSet();
        InfoOperate info = new InfoOperate();
        string sRet = "";

        sRet = info.getBookList(ref ds, "book", _Count, "order");

        if (sRet == "")
        {
            if (_PageSize != 0)
            {
                //分页
                PanelPages.Visible = true;
                LBFinalPage.Visible = true;
                LBFirstPage.Visible = true;
                LBPrePage.Visible = true;
                LBNextPage.Visible = true;
                LabelTotalPage.Visible = true;
                LabelPageNo.Visible = true;
                Label1.Visible = true;
                Label2.Visible = true;
                Label3.Visible = true;
                Label4.Visible = true;


                PagedDataSource ps = new PagedDataSource();
                int PageNo = Convert.ToInt32(LabelPageNo.Text.ToString());

                ps.DataSource = ds.Tables["book"].DefaultView;
                ps.AllowPaging = true;
                ps.PageSize = 6;
                ps.CurrentPageIndex = PageNo - 1;

                LBFinalPage.Enabled = true;
                LBFirstPage.Enabled = true;
                LBNextPage.Enabled = true;
                LBPrePage.Enabled = true;

                if (ps.IsFirstPage)
                {
                    //判断是否为首页
                    LBFirstPage.Enabled = false;
                    LBPrePage.Enabled = false;
                    if (ps.PageCount == 1)
                    {
                        LBFinalPage.Enabled = false;
                        LBNextPage.Enabled = false;
                    }
                }
                if (ps.IsLastPage)
                {
                    //判断是否为末页
                    LBFinalPage.Enabled = false;
                    LBNextPage.Enabled = false;
                }

                DLBookList.DataSource = ps;

                DLBookList.DataKeyField = "BLID";
                DLBookList.DataBind();

                LabelTotalPage.Text = ps.PageCount.ToString();
            }
            else
            {
                //不分页
                PanelPages.Visible = false;
                LBFinalPage.Visible = false;
                LBFirstPage.Visible = false;
                LBPrePage.Visible = false;
                LBNextPage.Visible = false;
                LabelTotalPage.Visible = false;
                LabelPageNo.Visible = false;
                Label1.Visible = false;
                Label2.Visible = false;
                Label3.Visible = false;
                Label4.Visible = false;

                DLBookList.DataSource = ds.Tables["book"].DefaultView;
                DLBookList.DataKeyField = "BLID";
                DLBookList.DataBind();
            }
        }

    }

    protected void LBFirstPage_Click(object sender, EventArgs e)
    {
        //显示首页
        LabelPageNo.Text = "1";
        BindToDLBookList();
    }
    protected void LBPrePage_Click(object sender, EventArgs e)
    {
        //显示上一页
        LabelPageNo.Text = Convert.ToString(Convert.ToInt32(LabelPageNo.Text.ToString()) - 1);
        BindToDLBookList();
    }
    protected void LBNextPage_Click(object sender, EventArgs e)
    {
        //显示下一页
        LabelPageNo.Text = Convert.ToString(Convert.ToInt32(LabelPageNo.Text.ToString()) + 1);
        BindToDLBookList();
    }
    protected void LBFinalPage_Click(object sender, EventArgs e)
    {
        //显示末页
        LabelPageNo.Text = LabelTotalPage.Text;
        BindToDLBookList();
    }
}