用过asp开发过web程序的人都知道,分页让asp程序员是一件非常头痛的事,我在这就来说说用asp.net轻松打造的分页技术.
第一步我们在vs.net新建项目,这些我不说了,你自己搞定吧,我在这里主要贴出重要的代码.
1.webform1.aspx
<%@ Page language="c#" Codebehind="WebForm1.aspx.cs" AutoEventWireup="false" Inherits="page.WebForm1" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>WebForm1</title>
<meta content="Microsoft Visual Studio 7.0" name="GENERATOR">
<meta content="C#" 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" method="post" runat="server">
<table align="center">
<tr>
<td style="HEIGHT: 104px" colspan=2><asp:datagrid id="DataGrid1" runat="server" PageSize="5" Font-Size="8pt" Font-Names="Verdana" BorderWidth="1px" BackColor="#FFE0C0" BorderColor="#FFC080" HorizontalAlign="Center" CellPadding="3" AllowPaging="True" Height="152px" Width="700px">
<AlternatingItemStyle BackColor="Linen">
</AlternatingItemStyle>
<ItemStyle VerticalAlign="Bottom">
</ItemStyle>
<HeaderStyle HorizontalAlign="Center" VerticalAlign="Bottom" BackColor="#FF8000">
</HeaderStyle>
<FooterStyle HorizontalAlign="Justify" BackColor="White">
</FooterStyle>
<PagerStyle HorizontalAlign="Right" ForeColor="Red" Mode="NumericPages">
</PagerStyle>
</asp:datagrid></td>
</tr>
<tr align="center">
<td align=left><font size=2>一共</font> <asp:Label ID="lblallcount" Runat=server Font-size="8pt" ForeColor="#0000ff" font-names="verdana"></asp:Label> <font size=2>记录</font>
<font size="2">共</font> <asp:label id="lblpagecount" runat="server" Font-Size="8pt" ForeColor="#0000ff" Font-Names="Verdana"></asp:label> <font size="2">页</font>
<font size="2">第</font> <asp:label id="lblcurrentindex" runat="server" Font-Size="8pt" ForeColor="#0000ff" Font-Names="Verdana"></asp:label> <font size="2">页</font></td>
<td align=right><asp:linkbutton id="first" runat="server" font-size="8pt" ForeColor="#3300ff" CommandArgument="first" Font-Names="Verdana"></asp:linkbutton>
<asp:linkbutton id="prev" Font-Size="8pt" ForeColor="#3300ff" CommandArgument="prev" Runat="server" Font-Names="Verdana"></asp:linkbutton>
<asp:linkbutton id="next" Font-Size="8pt" ForeColor="#3300ff" CommandArgument="next" Runat="server" Font-Names="Verdana"></asp:linkbutton>
<asp:linkbutton id="last" Font-Size="8pt" ForeColor="#3300ff" CommandArgument="last" Runat="server" Font-Names="Verdana"></asp:linkbutton>
<font size="2">跳转到第</font><asp:TextBox ID="to" Runat="server" Columns="1" /><font size="2">页</font><asp:Button ID="go" Text="GO" Runat="server" BackColor="WhiteSmoke" Font-Names="Verdana"/>
</td>
</tr>
</table>
</form>
</body>
</HTML>
2.webform1.cs
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
namespace page
{
/// <summary>
/// WebForm1 的摘要说明。
/// </summary>
public class WebForm1 : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Label lblpagecount;
protected System.Web.UI.WebControls.Label lblcurrentindex;
protected System.Web.UI.WebControls.LinkButton first;
protected System.Web.UI.WebControls.LinkButton prev;
protected System.Web.UI.WebControls.LinkButton next;
protected System.Web.UI.WebControls.DataGrid DataGrid1;
protected System.Web.UI.WebControls.TextBox to;
protected System.Web.UI.WebControls.Button go;
protected System.Web.UI.WebControls.Label lblallcount;
protected System.Web.UI.WebControls.LinkButton last;
void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
first.Text="最首页";
prev.Text="前一页";
next.Text="下一页";
last.Text="最后页";
if(!IsPostBack)
{
BindGrid();
}
}
#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.DataGrid1.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEventHandler(this.Page_Changed);
this.first.Click += new System.EventHandler(this.btnClick);
this.prev.Click += new System.EventHandler(this.btnClick);
this.next.Click += new System.EventHandler(this.btnClick);
this.last.Click += new System.EventHandler(this.btnClick);
this.go.Click += new System.EventHandler(this.goClick);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
void Page_Changed(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
{
DataGrid1.CurrentPageIndex=e.NewPageIndex;
BindGrid();
}
void BindGrid()
{
SqlConnection cn=new SqlConnection("server=localhost;database=pubs;uid=sa;pwd=");
cn.Open();
SqlDataAdapter da=new SqlDataAdapter("select * from authors",cn);
DataSet ds=new DataSet();
da.Fill(ds,"authors");
DataGrid1.DataSource=ds.Tables["authors"].DefaultView;
DataGrid1.DataBind();
cn.Close();
showstate();
}
void showstate()
{
SqlConnection cn=new SqlConnection("server=localhost;database=pubs;uid=sa;pwd=");
cn.Open();
SqlDataAdapter da=new SqlDataAdapter("select * from authors",cn);
DataSet ds=new DataSet();
da.Fill(ds,"authors");
DataTable dt=ds.Tables["authors"];
int count=dt.Rows.Count;
lblallcount.Text=count.ToString();
lblpagecount.Text=DataGrid1.PageCount.ToString();
lblcurrentindex.Text=(DataGrid1.CurrentPageIndex+1).ToString();
}
void btnClick(object sender,System.EventArgs e)
{
string arg=((LinkButton)sender).CommandArgument;
switch(arg)
{
case ("first"):
DataGrid1.CurrentPageIndex=0;
break;
case ("prev"):
if(DataGrid1.CurrentPageIndex>0)
DataGrid1.CurrentPageIndex--;
break;
case ("next"):
if(DataGrid1.CurrentPageIndex<(DataGrid1.PageCount-1))
DataGrid1.CurrentPageIndex++;
break;
case ("last"):
DataGrid1.CurrentPageIndex=DataGrid1.PageCount-1;
break;
default:
DataGrid1.CurrentPageIndex=Convert.ToInt32(arg);
break;
}
BindGrid();
}
private void goClick(object sender, System.EventArgs e)
{
if(to.Text.Trim()!="")
{
int index=Int32.Parse(to.Text.Trim())-1;
if(index>=0&&index<DataGrid1.PageCount)
{
DataGrid1.CurrentPageIndex=index;
}
}
BindGrid();
}
}
}