.NET开发：用asp.net轻松打造功能完备的分页技术!!!!

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用asp.net轻松打造功能完备的分页技术!!!!

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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>

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();
  }

}
}

好了,现在这个分页的web 程序完成了,你去试试.

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