| 一个功能齐全的DataGrid分页例子 |
作者：孟宪会 出自：【孟宪会之精彩世界】 发布日期：2003年5月11日 11点35分53秒
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下面的这个例子提供了DataGrid的分页功能。aspx代码和Cohe Behind代码分别如下，注意更改数据录连接字符串。结果如下：
C#版本 例子
DataGridPaging.aspx <![CDATA[<%@ 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>
<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>
<asp:linkbutton id="btnPrev" onclick="PagerButtonClick" runat="server" Font-Name="verdana"
Font-size="8pt" ForeColor="navy" CommandArgument="prev"></asp:linkbutton>
<asp:linkbutton id="btnNext" onclick="PagerButtonClick" runat="server" Font-Name="verdana"
Font-size="8pt" ForeColor="navy" CommandArgument="next"></asp:linkbutton>
<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 <![CDATA[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
}
}
]]>
VB.NET版本
DataGridPaging.aspx <![CDATA[<%@ Page Language="vb" AutoEventWireup="false" Codebehind="DataGridPaging.aspx.vb" Inherits="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" 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"></HeaderStyle>
<PagerStyle HorizontalAlign="Right" Mode="NumericPages"></PagerStyle>
</asp:datagrid>
<p style="font-size:9pt">
<asp:label id="lblPageCount" runat="server"></asp:label>
<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>
<asp:linkbutton id="btnPrev" onclick="PagerButtonClick" runat="server"
Font-Name="verdana" Font-size="8pt" ForeColor="navy" CommandArgument="prev">
</asp:linkbutton>
<asp:linkbutton id="btnNext" onclick="PagerButtonClick" runat="server"
Font-Name="verdana" Font-size="8pt" ForeColor="navy" CommandArgument="next">
</asp:linkbutton>
<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.vb <![CDATA[Imports System.Data.SqlClient
Imports System.Data
Imports System.Web.UI
Public Class DataGridPaging
Inherits System.Web.UI.Page
Protected WithEvents MyDataGrid As System.Web.UI.WebControls.DataGrid
Protected WithEvents btnFirst As System.Web.UI.WebControls.LinkButton
Protected WithEvents btnPrev As System.Web.UI.WebControls.LinkButton
Protected WithEvents btnNext As System.Web.UI.WebControls.LinkButton
Protected WithEvents btnLast As System.Web.UI.WebControls.LinkButton
Protected WithEvents lblCurrentIndex As System.Web.UI.WebControls.Label
Protected WithEvents lblPageCount As System.Web.UI.WebControls.Label
Protected WithEvents DataGrid1 As System.Web.UI.WebControls.DataGrid
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
End Sub
Private Sub Page_Init(ByVal sender As System.Object,_
ByVal e As System.EventArgs) Handles MyBase.Init
'CODEGEN: This method call is required by the Web Form Designer
'Do not modify it using the code editor.
InitializeComponent()
End Sub
#End Region
Private Sub Page_Load(ByVal sender As System.Object,_
ByVal e As System.EventArgs) Handles MyBase.Load
btnFirst.Text = "最首页"
btnPrev.Text = "前一页"
btnNext.Text = "下一页"
btnLast.Text = "最后页"
OpenDatabase()
BindGrid()
End Sub
Sub MyDataGrid_Page(ByVal sender As Object, ByVal e As DataGridPageChangedEventArgs)
Dim startIndex As Integer
startIndex = MyDataGrid.CurrentPageIndex * MyDataGrid.PageSize
MyDataGrid.CurrentPageIndex = e.NewPageIndex
BindGrid()
ShowStats()
End Sub
Sub BindGrid()
Dim myConnection As SqlConnection = cn
Dim ds As DataSet = New DataSet()
Dim adapter As SqlDataAdapter = New SqlDataAdapter("Select * from Orders", myConnection)
adapter.Fill(ds, "Orders")
MyDataGrid.DataSource = ds.Tables("Orders").DefaultView
MyDataGrid.DataBind()
ShowStats()
End Sub
Sub PagerButtonClick(ByVal sender As Object, ByVal e As EventArgs)
'used by external paging UI
Dim arg As String = sender.CommandArgument
Select Case arg
Case "next"
If (MyDataGrid.CurrentPageIndex < (MyDataGrid.PageCount - 1)) Then
MyDataGrid.CurrentPageIndex += 1
End If
Case "prev"
If (MyDataGrid.CurrentPageIndex > 0) Then
MyDataGrid.CurrentPageIndex -= 1
End If
Case "last"
MyDataGrid.CurrentPageIndex = (MyDataGrid.PageCount - 1)
Case Else
'page number
MyDataGrid.CurrentPageIndex = System.Convert.ToInt32(arg)
End Select
BindGrid()
ShowStats()
End Sub
Sub ShowStats()
lblCurrentIndex.Text = "第 " + (MyDataGrid.CurrentPageIndex + 1).ToString() + " 页"
lblPageCount.Text = "总共 " + MyDataGrid.PageCount.ToString() + " 页"
End Sub
Public cn As New SqlClient.SqlConnection()
Public Sub OpenDatabase()
cn.ConnectionString = "Server=.;Database=NorthWind;User Id=sa;Password=;"
cn.Open()
End Sub
End Class
]]>
方法2：完全后代码写法：例子
DataGridPaging2.aspx <![CDATA[<%@ Page language="c#" EnableViewState = "true" Codebehind="DataGridPaging2.aspx.cs" AutoEventWireup="false"
Inherits="eMeng.Exam.DataGridPaging2.DataGridPaging2" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE>功能齐全的分页的例子【2】</TITLE>
<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" 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 align="center">
<asp:label id="lblPageCount" runat="server" Font-Size="9pt" Font-Bold="True"></asp:label>
<asp:label id="lblCurrentIndex" runat="server" Font-Size="9pt" Font-Bold="True"></asp:label>
<asp:linkbutton id="btnFirst" runat="server" Font-size="9pt" ForeColor="navy" CommandArgument="0"/>
<asp:linkbutton id="btnPrev" runat="server" Font-size="9pt" ForeColor="navy" CommandArgument="prev"/>
<asp:linkbutton id="btnNext" runat="server" Font-size="9pt" ForeColor="navy" CommandArgument="next"/>
<asp:linkbutton id="btnLast" runat="server" Font-size="9pt" ForeColor="navy" CommandArgument="last"/>
</p>
</form>
</body>
</HTML>
]]>
DataGridPaging2.aspx.cs <![CDATA[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.DataGridPaging2
{
/// <summary>
/// DataGridPaging 的摘要说明。
/// </summary>
public class DataGridPaging2 : 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="
+ HttpContext.Current.Server.MapPath("../../aspxWeb.mdb.ascx");
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();
}
#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.MyDataGrid.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEventHandler(this.OnPageIndexChanged);
this.btnFirst.Click += new System.EventHandler(this.PagerButtonClick);
this.btnPrev.Click += new System.EventHandler(this.PagerButtonClick);
this.btnNext.Click += new System.EventHandler(this.PagerButtonClick);
this.btnLast.Click += new System.EventHandler(this.PagerButtonClick);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void OnPageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
{
int startIndex ;
startIndex = MyDataGrid.CurrentPageIndex * MyDataGrid.PageSize;
MyDataGrid.CurrentPageIndex = e.NewPageIndex;
BindGrid();
ShowStats();
}
}
}
]]> |
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