小巧精致的ASP.Net分页控件

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Text;

using System.Text.RegularExpressions;

namespace MyTest

{

public partial class PageShow : System.Web.UI.UserControl

{

#region 私有成员

/// <summary>

/// 当前页的页码的背景色

/// </summary>

private string _color = "#a8ceff";

/// <summary>

/// 总记录数

/// </summary>

private int _recTotal = 0;

/// <summary>

/// 每页显示的记录数, 默认为10

/// </summary>

private int _pageSize = 10;

/// <summary>

/// 当前页的页码左右要显示的页码的个数, 默认7个

/// </summary>

private int _pageShowNum = 7;

#endregion

#region 公共属性

/// <summary>

/// 设置或读取总记录数,不能小于0

/// </summary>

public int RecTotal

{

get { return _recTotal; }

set

{

if (value > 0)

_recTotal = value;

}

}

/// <summary>

/// 设置或读取每页显示的记录数,不能小于0

/// </summary>

public int PageSize

{

get { return _pageSize; }

set

{

if (value > 0)

_pageSize = value;

}

}

/// <summary>

/// 读取总页数

/// </summary>

public int PageTotal

{

get {

int total = (int)Math.Ceiling((double)_recTotal / _pageSize);

return total;

//return PageTotal;

}

}

/// <summary>

/// 读取当前要显示第几页,注:页码传递方式是Request.QueryString["page"]

/// </summary>

public int PageIndex

{

get

{

int pageIndex = 1;

string tmp = Request.QueryString["page"];

if (tmp != null && tmp != string.Empty)

{

if (tmp == "end")

pageIndex = PageTotal;

else

{

try

{

pageIndex = int.Parse(tmp);

if (pageIndex > PageTotal)

pageIndex = PageTotal;

else if (pageIndex < 1)

pageIndex = 1;

}

catch (Exception)

{

pageIndex = 1;

}

}

}

return pageIndex;

}

}

/// <summary>

/// 设置或读取当前页的页码的背景色,默认为#a8ceff

/// </summary>

public string Color

{

get { return _color; }

set { _color = value; }

}

/// <summary>

/// 当前页的页码左右要显示的页码的个数,默认7个

/// </summary>

public int PageShowNum

{

get { return _pageShowNum; }

set { _pageShowNum = value; }

}

#endregion

/// <summary>

/// 重写Render事件,发送生成的分页Url

/// </summary>

/// <param name="writer"></param>

protected override void Render(HtmlTextWriter writer)

{

if (PageTotal <= 1)

{//少于1页时，不显示

return;

}

StringBuilder writeStr = new StringBuilder();

#region 控件使用的CSS代码

writeStr.Append(@"

<style type='text/css'>.page_total {background-color: #F5FBFF; border: 1px solid #86B9D6; border-right: 0px solid #86B9D6; font-weight: bold; }

.page_pages {background-color: #F5FBFF; border: 1px solid #86B9D6; margin-right:1px; vertical-align: middle; font-weight: bold; }

.page_num {background-color: #FFFFFF; border: 1px solid #DEDEB8; margin-right:1px; vertical-align: middle; }

a:hover.page_num  {background-color: #F5FBFF; border: 1px solid #86B9D6; text-decoration: none; }

.page_curpage { margin-right:1px; border: 1px solid #DEDEB8; vertical-align: middle; background-color: #FFFF80; color: #92A05A; font-weight: bold; }

.page_bar { margin: 1px 0px; clear: both; }

.page_bar a { float: left; padding: 1px 4px; font-size: 12px; text-decoration: none; }

.page_redirect { background-color: #FFFFFF; border: 1px solid #DEDEB8; margin-right:1px; font-size: 12px !important; font-size: 13px; }

a:hover.page_redirect { background-color: #F5FBFF; border: 1px solid #86B9D6; text-decoration: none; }

</style>");

#endregion

writeStr.Append("<table cellspacing='0' cellpadding='0' align='left' style='clear: both;'>");

writeStr.Append("<tr><td valign='bottom'>");

writeStr.Append("<div class='page_bar'>");

writeStr.Append("<a class='page_total' title='记录总数'> " + _recTotal.ToString() + " </a>");

writeStr.Append("<a class='page_pages' title='当前页/总页数'> " + PageIndex + "/" + PageTotal + " </a>");

string url = GetUrl().ToLower();//取得当前页面的完整URL

string tmp;

//没有page时，加一个page, 方便后面替换

if (url.IndexOf("page=") < 0)

{

url = url + ((url.IndexOf("?") < 0) ? "?" : "&") + "page=1";

}

//设定正则表达式,用于替换url中的page=字符串

Regex my = new Regex(@"(page=[0-9]*(end)*)", RegexOptions.IgnoreCase);

#region 如果当前是指定显示个数的页码之后的页时,加上到第一页和上一页的链接(此时页面不会显示页码1)

if (PageIndex > _pageShowNum + 1)

{

//第一页

tmp = my.Replace(url, "page=1");

writeStr.Append("<a class='page_redirect' href='" + tmp + "' title='第一页'>|<</a>");

//上一页

tmp = my.Replace(url, "page=" + (PageIndex - 1).ToString());

writeStr.Append("<a class='page_redirect' href='" + tmp + "' title='上一页'><</a>");

}

#endregion

//总共显示( _pageShowNum * 2 + 1 )页的链接,从当前页往前_pageShowNum页,往前不足_pageShowNum页时,后面的页数增加.

int countPage = 0;//用于统计是否超过( _pageShowNum * 2 + 1 )页

int loopStart;

//当总页数大于( _pageShowNum * 2 + 1 ),且当前页为最后_pageShowNum页时,保持页面页码数不少于( _pageShowNum * 2 + 1 )

if (PageTotal - PageIndex >= _pageShowNum)

{

// 总页数 减 当前页码 大于等于左边要显示的个数时,循环 从当前页码 大于等于左边要显示的个数 开始

loopStart = PageIndex - _pageShowNum;

}

else

{

loopStart = PageTotal - _pageShowNum * 2;// PageIndex - _pageShowNum - (_pageShowNum - PageTotal + PageIndex) ==> PageTotal - _pageShowNum * 2

}

for (int loop = loopStart; loop <= PageTotal; loop++)

{

if (loop < 1)

continue;

else

countPage++;

#region 已经显示了( _pageShowNum * 2 + 1 )页 并且 当前页数小于等于总页数时,加上到最末页和上一页的链接并退出循环(不会显示最后1页的页码时)

if (countPage > (_pageShowNum * 2 + 1) && loop <= PageTotal)

{

//下一页

tmp = my.Replace(url, "page=" + (PageIndex + 1).ToString());

writeStr.Append("<a class='page_redirect' href='" + tmp + "' title='下一页'>></a>");

//最终页

tmp = my.Replace(url, "page=" + PageTotal.ToString());// my.Replace(url, "page=end");

writeStr.Append("<a class='page_redirect' href='" + tmp + "' title='最末页'>>|</a>");

break;

}

#endregion

#region 添加当前循环页的链接

if (loop == PageIndex)

{//当前页

writeStr.Append("<a class='page_curpage' style='background-color:" + _color + "'>" +

loop.ToString() + "</a>");// style='width:" + (loop > 99 ? (width + 5).ToString() : width.ToString()) + "px;'

}

else

{

//计算下一页的链接

tmp = my.Replace(url, "page=" + loop.ToString());

writeStr.Append("<a class='page_num' href='" + tmp + "' title='第" +

loop.ToString() + "页''>" + loop.ToString() + "</a>");

}

#endregion

}

writeStr.Append("</div></td></tr></table>");

writer.Write(writeStr.ToString());

}

/// <summary>

/// 获取当前页面的完整URL地址信息

/// </summary>

/// <returns></returns>

public string GetUrl()

{

string url;

url = System.Web.HttpContext.Current.Request.ServerVariables["SERVER_NAME"];

if (System.Web.HttpContext.Current.Request.ServerVariables["SERVER_PORT"] != "80")

url += ":" + System.Web.HttpContext.Current.Request.ServerVariables["SERVER_PORT"];

//strTemp = strTemp & CheckStr(Request.ServerVariables("URL"))

url += System.Web.HttpContext.Current.Request.ServerVariables["SCRIPT_NAME"];

if (!(System.Web.HttpContext.Current.Request.QueryString == null || System.Web.HttpContext.Current.Request.QueryString.ToString() == ""))

{

url += "?" + System.Web.HttpContext.Current.Request.QueryString.ToString();

}

string https = System.Web.HttpContext.Current.Request.ServerVariables["HTTPS"];

if (https == null || https == string.Empty || https == "off")

{

url = "http://" + url;

}

else

{

url = "https://" + url;

}

return url;

}

}

}

用法示例(假设用户控件名为:PageShow.ascx),把下面的代码拷贝到一个aspx文件中,即可运行:

<%@ Page Language="C#" %>

<%@ Register Src="PageShow.ascx" TagName="PageShow" TagPrefix="uc1" %>

<!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>无标题页</title>

<script type="text/C#" runat="server">

void Page_Load(object sender, EventArgs e)

{

// 创建一个DataTable,用作数据源,你应该是去数据库取数据了

System.Data.DataTable dt = new System.Data.DataTable();

dt.Columns.Add("a1");

for (int loop = 1; loop <= 1000; loop++)

{

System.Data.DataRow dr = dt.NewRow();

dt.Rows.Add(dr);

dr["a1"] = "aaa" + loop.ToString();

}

PageShow1.RecTotal = dt.Rows.Count; // 必需设定,否则不会显示, 设定记录总数

PageShow1.Color = "red";            // 可以不设, 设置当前页码的背景色,默认为#a8ceff

PageShow1.PageShowNum = 3;          // 可以不设, 设置当前页的页码左右要显示的页码的个数,默认7个

PageShow1.PageSize = 6;             // 可以不设, 设置每页显示的记录数,默认10条

// 开始分页,绑定到页面上的Repeater

System.Web.UI.WebControls.PagedDataSource pgd = new PagedDataSource();

pgd.DataSource = dt.DefaultView;

pgd.CurrentPageIndex = PageShow1.PageIndex - 1; // 设置PagedDataSource当前显示第几页,注意减1

pgd.PageSize = PageShow1.PageSize;              // 设置PagedDataSource每页显示的记录数,默认10条

pgd.AllowPaging = true;

Repeater1.DataSource = pgd;

Repeater1.DataBind();

}

</script>

</head>

<body>

<form id="form1" runat="server">

<div>

<uc1:PageShow ID="PageShow1" runat="server" />

<br />

<asp:Repeater ID="Repeater1" runat="server">

<ItemTemplate>

<br />

<%# DataBinder.Eval(Container.DataItem, "a1")%>

</ItemTemplate>

</asp:Repeater>

<br />

</div>

</form>

</body>

</html>