DataGrid分页技巧

WebForm1.aspx

<%@ 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>

</HEAD>

<asp:datagrid id="MyDataGrid" runat="server" AutoGenerateColumns="False" HorizontalAlign="Center"

AlternatingItemStyle-BackColor="#eeeeee" HeaderStyle-BackColor="#aaaadd" Font-Size="8pt" Font-Name="Verdana"

CellPadding="3" BorderWidth="1px" BorderColor="Black" OnPageIndexChanged="MyDataGrid_Page"

PagerStyle-HorizontalAlign="Right" PagerStyle-Mode="NumericPages" PageSize="5" AllowPaging="True"

Font-Names="Verdana">

<asp:BoundColumn DataField="Title" HeaderText="标题">

</asp:BoundColumn>

<asp:BoundColumn DataField="pubdate" HeaderText="发表日期" DataFormatString="{0:yyyy-MM-dd hh:mm:ss}">

</asp:BoundColumn>

<asp:ButtonColumn Text="选择" CommandName="Select">

</asp:ButtonColumn>

</Columns>

</asp:datagrid>

<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>

WebForm1.aspx.cs

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();

ShowStats();

BindGrid();

}

private void OpenDatabase()

{

cn.ConnectionString = @"Auto Translate=True;User ID=sa;Tag with column collation when possible=False;

Data Source='192.168.0.99';Password=4703;Initial Catalog=pubs;Use Procedure for Prepare=1;

Provider='SQLOLEDB.1';Persist Security Info=True;Workstation ID=DNB07;Use Encryption for Data=False;

Packet Size=4096";

cn.Open();

}

private void ShowStats()

{

lblCurrentIndex.Text = "第 " + (MyDataGrid.CurrentPageIndex + 1).ToString() + " 页";

lblPageCount.Text = "总共 " + MyDataGrid.PageCount.ToString() + " 页";

btnFirst.Enabled = !(MyDataGrid.CurrentPageIndex == 0);

btnPrev.Enabled = (MyDataGrid.CurrentPageIndex > 0);

btnNext.Enabled = (MyDataGrid.CurrentPageIndex+1 < MyDataGrid.PageCount);

btnLast.Enabled = (MyDataGrid.CurrentPageIndex+1 < MyDataGrid.PageCount);

}

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,pubdate from titles", 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.MyDataGrid.ItemCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.MyDataGrid_ItemCommand);

this.Load += new System.EventHandler(this.Page_Load);

}

#endregion

private void MyDataGrid_ItemCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

{

if (e.CommandName == "Select")

{

Response.Write("Hello");

}

posted on 2005-06-27 14:30 DoNet鸟阅读(583) 评论(0) 编辑收藏举报

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