datalist的分页

来源：互联网发布：梦与叶樱动作数据编辑：程序博客网时间：2024/04/30 00:35

后代代码

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;

public partial class datalist : System.Web.UI.Page
{
    SqlConnection MyConn;
    int PageSize, RecordCount, PageCount, CurrentPage;
    public void Page_Load(Object src, EventArgs e)
    {
        //设定PageSize
        PageSize = 10;

        //连接语句
        string MyConnString=ConfigurationManager.AppSettings["strConn"].ToString() ;
        MyConn = new SqlConnection(MyConnString);
        MyConn.Open();

        //第一次请求执行
        if (!Page.IsPostBack)
        {

            CurrentPage = 0;
            ViewState["PageIndex"] = 0;

            //计算总共有多少记录
            RecordCount = CalculateRecord();
            lblRecordCount.Text = RecordCount.ToString();

            //计算总共有多少页
            if (RecordCount % PageSize == 0)
            {
                PageCount = RecordCount / PageSize;
            }
            else
            {
                PageCount = RecordCount / PageSize + 1;
            }
            lblPageCount.Text = PageCount.ToString();
            ViewState["PageCount"] = PageCount;
            ListBind();
        }
    }
    //计算总共有多少条记录
    public int CalculateRecord()
    {
        int intCount;
        string strCount = "select count(*) as co from t";
        SqlCommand MyComm = new SqlCommand(strCount, MyConn);
        SqlDataReader dr = MyComm.ExecuteReader();
        if (dr.Read())
        {
            intCount = Int32.Parse(dr["co"].ToString());
        }
        else
        {
            intCount = 0;
        }
        dr.Close();
        return intCount;
    }

ICollection CreateSource()
{

int StartIndex;

        //设定导入的起终地址
        StartIndex = CurrentPage * PageSize;
        string strSel = "select * from t";
        DataSet ds = new DataSet();

SqlDataAdapter MyAdapter = new SqlDataAdapter(strSel, MyConn);
MyAdapter.Fill(ds, StartIndex, PageSize, "t");

        return ds.Tables["t"].DefaultView;
    }
    public void ListBind()
    {
        score.DataSource = CreateSource();
        score.DataBind();

        lbnNextPage.Enabled = true;
        lbnPrevPage.Enabled = true;
        if (CurrentPage == (PageCount - 1)) lbnNextPage.Enabled = false;
        if (CurrentPage == 0) lbnPrevPage.Enabled = false;
        lblCurrentPage.Text = (CurrentPage + 1).ToString();

}

    public void Page_OnClick(Object sender, CommandEventArgs e)
    {
        CurrentPage = (int)ViewState["PageIndex"];
        PageCount = (int)ViewState["PageCount"];

        string cmd = e.CommandName;
        //判断cmd，以判定翻页方向
        switch (cmd)
        {
            case "next":
                if (CurrentPage < (PageCount - 1)) CurrentPage++;
                break;
            case "prev":
                if (CurrentPage > 0) CurrentPage--;
                break;
        }

ViewState["PageIndex"] = CurrentPage;

ListBind();

}
}
前台代码

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="datalist.aspx.cs" Inherits="datalist" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>无标题页</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        共有<asp:Label ID="lblRecordCount" ForeColor="red" runat="server" />条记录  当前为<asp:Label
            ID="lblCurrentPage" ForeColor="red" runat="server" />/<asp:Label ID="lblPageCount"
                ForeColor="red" runat="server" />页 
        <asp:DataList ID="score" runat="server" HeaderStyle-BackColor="#aaaadd" AlternatingItemStyle-BackColor="Gainsboro"
            EditItemStyle-BackColor="yellow">
<EditItemStyle BackColor="Yellow"></EditItemStyle>

            </ItemTemplate>
        </asp:DataList>
        <asp:LinkButton ID="lbnPrevPage" Text="上一页" CommandName="prev" OnCommand="Page_OnClick"
            runat="server" />
        <asp:LinkButton ID="lbnNextPage" Text="下一页" CommandName="next" OnCommand="Page_OnClick"
            runat="server" />
    </div>
    </form>
</body>
</html>