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在我们的项目中，通常会要对查询结果进行分页展示，以提高系统的响应速度，减轻服务器负荷。ASP.NET提供的 Gridview 控件虽然提供了分页，但是需要将查询的所有数据都提取绑定到Gridview后，才能显示分页工具栏，这样当数据量很大时，性能就会下降很多。
用户控件 AspnetPager 应运而生。它需要与分页存储过程联合使用。
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AspNetPager 使用方法：
1. 将该用户控件放入工程，然后在aspx页面中添加引用。添加引用代码：<%@ Register Src="~/Parts/AspnetPager.ascx" TagName="AspNetPager" TagPrefix="pcc" %>
2. 只需要设置查询结果的总记录条数：TotalRecordsCount 属性值。另外还可以设置或修改 PageSize（每页显示记录条数）和 CurrentPageIndex（当前页号） 属性。
3. 在 OnPageIndex_Changed 事件中去重新绑定数据，并设置分页数据，主要是 TotalRecordsCount 属性。
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分页存储过程如下：
IF OBJECT_ID('jjp_CategoryList_Get') IS NOT NULL DROP PROCEDURE jjp_CategoryList_Get;GOCREATE PROCEDURE jjp_CategoryList_Get( @pageIndex int, @PageSize int, @Records int output)ASbegin with tmpTable as ( select categoryid, categoryname, description , row_number() over( order by categoryid) as rownum from dbo.categories ) select * from tmpTable where rownum between (@pageIndex-1)*@PageSize+1 and @PageIndex*@PageSize; select @Records=count(*) from dbo.Categories;end
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AspnetPager 控件ascx代码如下：
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="AspnetPager.ascx.cs" Inherits="Parts_AspnetPager"%><div> <table style=" font-size:12px;"> <tr> <td style="width: 32px"> <asp:LinkButton ID="LBtn_firstPage" runat="server" Text="首页|" OnClick="LBtn_firstPage_Click"></asp:LinkButton> </td> <td style="width: 32px"> <asp:LinkButton ID="LBtn_prePage" runat="server" Text="上页|" OnClick="LBtn_prePage_Click"></asp:LinkButton> </td> <td style="width: 32px"> <asp:TextBox ID="txt_PageIndex" runat="server" Width="62px" ToolTip="第几页" AutoPostBack="True" BorderWidth="1px" BorderStyle="Solid" OnTextChanged="txt_PageIndex_TextChanged">1</asp:TextBox> </td> <td style="width: 32px"> <asp:LinkButton runat="server" Text="下页|" ID="LBtn_nextPage" OnClick="LBtn_nextPage_Click"></asp:LinkButton> </td> <td style="width: 32px"> <asp:LinkButton runat="server" Text="末页" ID="LBtn_lastPage" OnClick="LBtn_lastPage_Click"></asp:LinkButton> </td> <td style="width: 74px"> <font face="宋体"> <asp:Label ID="Label2" runat="server" Width="72px" Font-Size="9pt">| 每页行数 |</asp:Label></font> </td> <td style="width: 32px"> <asp:TextBox ID="txt_PageSize" runat="server" Width="56px" ToolTip="每页的行数" AutoPostBack="True" BorderWidth="1px" BorderStyle="Solid" OnTextChanged="txt_PageSize_TextChanged">2</asp:TextBox> </td> <td style="width: 72px"> <font face="宋体"> <asp:Label ID="Label1" runat="server" Width="70px" Font-Size="9pt">| 总记录数|</asp:Label></font> </td> <td style="width: 74px"> <asp:Label ID="LableTotalCount" runat="server" Width="20px" Font-Size="9pt" ForeColor="Red"></asp:Label> </td> </tr> </table> </div>
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AspnetPager.ascx.cs
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/************************************************************** * 作者：jjpeng * 邮箱：ling121211@gmail.com * 时间：2011-10-29 11:27:20 *------------------------------------------------------------- * 功能说明： * 1. 该控件用于与分页存储过程联合使用用于数据分页 * 2. 对外公开的属性有： * --PageSize： 每页显示的记录条数（默认为2） * --CurrentPageIndex： 当前的页号（如果是第一页则为1，默认为1） * --TotalRecordsCount： 总的记录条数，需要在每次绑定完数据后设置值 * 3. 翻页时触发的事件 * --OnPageIndex_Changed： 只需要在此处重新执行绑定操作即可 * *************************************************************/using System;using System.Collections.Generic;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;public partial class Parts_AspnetPager : System.Web.UI.UserControl{ protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { this._currentPageIndex = int.Parse(this.txt_PageIndex.Text.Trim( )); this._pageSize = int.Parse(this.txt_PageSize.Text.Trim( )); TotalPageCount = this._totalRecordsCount % this._pageSize == 0 ? this._totalRecordsCount / this._pageSize : this._totalRecordsCount / this._pageSize + 1; } } public event Action<object, EventArgs> PageIndex_Chaged; private int _currentPageIndex; ///<summary> /// 当前页号 ///</summary> public int CurrentPageIndex { get { if (this._currentPageIndex == 0) { return int.Parse(txt_PageIndex.Text.Trim( )); } return this._currentPageIndex; } set { this._currentPageIndex = value; this.txt_PageIndex.Text = value.ToString( ); } } private int _pageSize; ///<summary> /// 每页显示记录条数 ///</summary> public int PageSize { get { if (this._pageSize == 0) { return int.Parse(txt_PageSize.Text.Trim( )); } return this._pageSize; } set { this._pageSize = value; this.txt_PageSize.Text = value.ToString( ); } } private int _totalRecordsCount; ///<summary> /// 总记录条数 ///</summary> public int TotalRecordsCount { get { if (this._totalRecordsCount == 0) { return int.Parse(this.LableTotalCount.Text); } return this._totalRecordsCount; } set { this._totalRecordsCount = value; this.LableTotalCount.Text = value.ToString( ); } } ///<summary> /// 总页数 ///</summary> private static int TotalPageCount; ///<summary> /// 第一页 ///</summary> ///<param name="sender"></param> ///<param name="e"></param> protected void LBtn_firstPage_Click(object sender, EventArgs e) { if (this._currentPageIndex != 1) { this._currentPageIndex = 1; this.txt_PageIndex.Text = this._currentPageIndex.ToString( ); } if (PageIndex_Chaged != null) { PageIndex_Chaged(sender, e); } } ///<summary> /// 上一页 ///</summary> ///<param name="sender"></param> ///<param name="e"></param> protected void LBtn_prePage_Click(object sender, EventArgs e) { this._currentPageIndex = int.Parse(this.txt_PageIndex.Text.Trim( )); if (this._currentPageIndex != 1 && this._currentPageIndex <= TotalPageCount) { this._currentPageIndex -= 1; this.txt_PageIndex.Text = this._currentPageIndex.ToString( ); if (PageIndex_Chaged != null) { PageIndex_Chaged(sender, e); } } } ///<summary> /// 后一页 ///</summary> ///<param name="sender"></param> ///<param name="e"></param> protected void LBtn_nextPage_Click(object sender, EventArgs e) { //当前页号 this._currentPageIndex = int.Parse(this.txt_PageIndex.Text.Trim( )); if (this._currentPageIndex < TotalPageCount) { this._currentPageIndex += 1; this.txt_PageIndex.Text = this._currentPageIndex.ToString( ); if (PageIndex_Chaged != null) { PageIndex_Chaged(sender, e); } } } ///<summary> /// 最后一页 ///</summary> ///<param name="sender"></param> ///<param name="e"></param> protected void LBtn_lastPage_Click(object sender, EventArgs e) { this._currentPageIndex = int.Parse(this.txt_PageIndex.Text.Trim( )); if (this._currentPageIndex != TotalPageCount) { this._currentPageIndex = TotalPageCount; this.txt_PageIndex.Text = this._currentPageIndex.ToString( ); } if (PageIndex_Chaged != null) { PageIndex_Chaged(sender, e); } } //更改每页显示的记录条数 protected void txt_PageSize_TextChanged(object sender, EventArgs e) { this._currentPageIndex = int.Parse(txt_PageIndex.Text); this._pageSize = int.Parse(this.txt_PageSize.Text.Trim( )); //总记录数 this._totalRecordsCount = int.Parse(this.LableTotalCount.Text.Trim( )); TotalPageCount = this._totalRecordsCount % this._pageSize == 0 ? this._totalRecordsCount / this._pageSize : this._totalRecordsCount / this._pageSize + 1; if (this._currentPageIndex > TotalPageCount) { this._currentPageIndex = TotalPageCount; this.txt_PageIndex.Text = this._currentPageIndex.ToString( ); } if (PageIndex_Chaged != null) { PageIndex_Chaged(sender, e); } } //页面跳转 protected void txt_PageIndex_TextChanged(object sender, EventArgs e) { //总记录数 this._totalRecordsCount = int.Parse(this.LableTotalCount.Text.Trim( )); //当前页号 this._currentPageIndex = int.Parse(txt_PageIndex.Text); //每页显示条数 this._pageSize = int.Parse(this.txt_PageSize.Text.Trim()); //如果当前页有效并且小于总页数 if (this._currentPageIndex>0 && this._currentPageIndex <= TotalPageCount ) { if (PageIndex_Chaged != null) { PageIndex_Chaged(sender, e); } } }}
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调用页面前台脚本和后台代码：
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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Test.aspx.cs" Inherits="Test"%><%@ Register Src="~/Parts/AspnetPager.ascx" TagName="AspNetPager" TagPrefix="pcc"%><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"> <title></title></head><body> <form id="form1" runat="server"> <div> <asp:GridView ID="testDataGridview" runat="server"></asp:GridView> <pcc:AspNetPager runat="server" ID="AspNetPager1" OnPageIndex_Chaged="AspNetPager1_PageIndexChanged"/> </div> </form></body></html>
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Data;using System.Data.SqlClient;public partial class Test : System.Web.UI.Page{ protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { this.GetData( ); } } protected void AspNetPager1_PageIndexChanged(object sender, EventArgs e) { this.GetData( ); } protected DataTable GetData( ) { DataTable table = null; using(SqlConnection conn = new SqlConnection("Data Source=.; Initial Catalog=Northwind; Integrated Security=True;")) { if(conn.State== ConnectionState.Closed) { conn.Open(); } SqlCommand cmd = new SqlCommand("jjp_CategoryList_Get", conn); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.AddWithValue("@pageIndex", this.AspNetPager1.CurrentPageIndex); cmd.Parameters.AddWithValue("@PageSize", this.AspNetPager1.PageSize); cmd.Parameters.Add("@Records", SqlDbType.Int); cmd.Parameters["@Records"].Direction = ParameterDirection.Output; SqlDataAdapter da = new SqlDataAdapter(cmd); DataSet ds = new DataSet( ); da.Fill(ds); this.testDataGridview.DataSource = ds.Tables[0]; this.testDataGridview.DataBind( ); this.AspNetPager1.TotalRecordsCount = int.Parse(cmd.Parameters["@Records"].Value.ToString( )); } return table; }}
路过的大虾，觉得实现不好的地方希望指出。感激不尽。
来源：https://www.cnblogs.com/jiejie_peng/archive/2011/10/29/2228808.html