DataGrid的分页

DataGridPaging.aspx代码:

 

<%@ Page language="c#" EnableViewState = "true" Codebehind="DataGridPaging.aspx.cs"
 AutoEventWireup="false" Inherits="eMeng.Exam.DataGridPaging.DataGridPaging" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<meta content="Visual Basic 7.0" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
</head>
<body MS_POSITIONING="GridLayout">
<form id="Form1" runat="server">
<asp:datagrid id="MyDataGrid" runat="server" AutoGenerateColumns="False"
 HorizontalAlign="Center" AlternatingItemStyle-BackColor="#eeeeee"
 HeaderStyle-BackColor="#aaaadd" Font-Size="8pt" Font-Name="Verdana"
 CellSpacing="0" CellPadding="3" GridLines="Both" BorderWidth="1"
 BorderColor="black" OnPageIndexChanged="MyDataGrid_Page" PagerStyle-HorizontalAlign="Right"
 PagerStyle-Mode="NumericPages" PageSize="5" AllowPaging="True">
  <AlternatingItemStyle BackColor="#EEEEEE"></AlternatingItemStyle>
  <HeaderStyle BackColor="#AAAADD" Font-Bold="True" HorizontalAlign="Center"></HeaderStyle>
  <PagerStyle HorizontalAlign="Right" Mode="NumericPages"></PagerStyle>
  <Columns>
  <asp:BoundColumn HeaderText="标题" DataField="Title" HeaderStyle-Width="480px">
  </asp:BoundColumn>
  <asp:BoundColumn HeaderText="发表日期" DataField="CreateDate" DataFormatString="{0:yyyy-MM-dd hh:mm:ss}">
  </asp:BoundColumn>
  </Columns>
</asp:datagrid>
<p style="FONT-SIZE:9pt" align="center">
  <asp:label id="lblPageCount" runat="server"></asp:label>&nbsp;
  <asp:label id="lblCurrentIndex" runat="server"></asp:label>
  <asp:linkbutton id="btnFirst" onclick="PagerButtonClick" runat="server" Font-Name="verdana"
   Font-size="8pt" ForeColor="navy" CommandArgument="0"></asp:linkbutton>&nbsp;
  <asp:linkbutton id="btnPrev" onclick="PagerButtonClick" runat="server" Font-Name="verdana"
   Font-size="8pt" ForeColor="navy" CommandArgument="prev"></asp:linkbutton>&nbsp;
  <asp:linkbutton id="btnNext" onclick="PagerButtonClick" runat="server" Font-Name="verdana"
   Font-size="8pt" ForeColor="navy" CommandArgument="next"></asp:linkbutton>&nbsp;
  <asp:linkbutton id="btnLast" onclick="PagerButtonClick" runat="server" Font-Name="verdana"
   Font-size="8pt" ForeColor="navy" CommandArgument="last"></asp:linkbutton>
</p>
</form>
</body>
</html>

 

DataGridPaging.aspx.cs代码:

<!--StartFragment-->using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.OleDb;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace eMeng.Exam.DataGridPaging
{
/// <summary>
/// DataGridPaging 的摘要说明。
/// </summary>
public class DataGridPaging : System.Web.UI.Page
{
protected System.Web.UI.WebControls.DataGrid MyDataGrid;
protected System.Web.UI.WebControls.Label lblPageCount;
protected System.Web.UI.WebControls.Label lblCurrentIndex;
protected System.Web.UI.WebControls.LinkButton btnFirst;
protected System.Web.UI.WebControls.LinkButton btnPrev;
protected System.Web.UI.WebControls.LinkButton btnNext;
protected System.Web.UI.WebControls.LinkButton btnLast;
private OleDbConnection cn = new OleDbConnection();

private void Page_Load(object sender, System.EventArgs e)
{
  // 在此处放置用户代码以初始化页面
  btnFirst.Text = "最首页";
  btnPrev.Text = "前一页";
  btnNext.Text = "下一页";
  btnLast.Text = "最后页";
  OpenDatabase();
  BindGrid();
}
private void OpenDatabase()
{
cn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("xxxx.mdb");
cn.Open();
}
private void ShowStats()
{
lblCurrentIndex.Text = "第 " + (MyDataGrid.CurrentPageIndex + 1).ToString() + " 页";
lblPageCount.Text = "总共 " + MyDataGrid.PageCount.ToString() + " 页";
}

public void PagerButtonClick(object sender, EventArgs e)
{
string arg = ((LinkButton)sender).CommandArgument.ToString();
switch(arg)
{
  case "next":
   if (MyDataGrid.CurrentPageIndex < (MyDataGrid.PageCount - 1))
   {
    MyDataGrid.CurrentPageIndex += 1;
   }
   break;
  case "prev":
   if (MyDataGrid.CurrentPageIndex > 0)
   {
    MyDataGrid.CurrentPageIndex -= 1;
   }
   break;
  case "last":
   MyDataGrid.CurrentPageIndex = (MyDataGrid.PageCount - 1);
   break;
  default:
   MyDataGrid.CurrentPageIndex = System.Convert.ToInt32(arg);
   break;
}
BindGrid();
ShowStats();
}
public void BindGrid()
{
OleDbConnection myConnection = cn;
DataSet ds  = new DataSet();
OleDbDataAdapter adapter  = new OleDbDataAdapter("Select Title,CreateDate from Document", myConnection);
adapter.Fill(ds, "Document");
MyDataGrid.DataSource = ds.Tables["Document"].DefaultView;
MyDataGrid.DataBind();
ShowStats();
}
public void MyDataGrid_Page(object sender, DataGridPageChangedEventArgs e)
{
int startIndex ;
startIndex = MyDataGrid.CurrentPageIndex * MyDataGrid.PageSize;
MyDataGrid.CurrentPageIndex = e.NewPageIndex;
BindGrid();
ShowStats();
}

#region Web Form Designer generated code
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.Load += new System.EventHandler(this.Page_Load);

}
#endregion
}
}

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