ASP.NET分页

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace PagerControls
{
[DefaultProperty("Text")]
[ToolboxData("<{0}:PagerControl runat=server></{0}:PagerControl>")]
public class PagerControl : WebControl
{

private int currentPage;                    // 当前页的页码
private int pageCount;                        // 总页数
private int recordCount;                    //总记录数

private bool showPrevious = false;        // 是否显示 上一页、第一页 的链接
private bool showNext = false;            // 是否显示 下一页、最末页 的链接

private int startPage;                        // 显示的第一页 的 页码
private int endPage;                            // 显示的最末页 的 页码

public int pageSize;                  //分页条数

public PagerControl()
{
// 当前页之前可以显示的最多链接数，大于此条链接将被隐藏
ViewState["PreviousPageCount"] = 5;

// 当前页之后可以显示的最多链接数，大于此条链接将被隐藏
ViewState["AfterPageCount"] = 4;

// 供客户端设置样式
ViewState["CssClass"] = "Pager";
}

public new string CssClass
{
get { return ViewState["CssClass"].ToString(); }
set { ViewState["CssClass"] = value; }
}

public int PreviousPageCount
{
get { return (int)ViewState["PreviousPageCount"]; }
set { ViewState["PreviousPageCount"] = value; }
}

public int AfterPageCount
{
get { return (int)ViewState["AfterPageCount"]; }
set { ViewState["AfterPageCount"] = value; }
}

public UrlManager UrlManager
{
get { return (UrlManager)ViewState["UrlManager"]; }
set { ViewState["UrlManager"] = value; }
}

// 添加“第一页”，“上一页”的连接
private void AddPreviousLink(UrlManager UrlManager, HtmlTextWriter output)
{
output.RenderBeginTag(HtmlTextWriterTag.Li);

//output.AddAttribute(HtmlTextWriterAttribute.Class, "PagerIcon");
output.AddAttribute(HtmlTextWriterAttribute.Title, "第一页");
//output.AddAttribute(HtmlTextWriterAttribute.Href, UrlManager.GetPageUrl(1));
output.AddAttribute(HtmlTextWriterAttribute.Onclick, "$(\"#page-content\").load('" + UrlManager.GetPageUrl(1) + "')");
output.AddAttribute(HtmlTextWriterAttribute.Href, "javascript:void(0);");
output.RenderBeginTag(HtmlTextWriterTag.A);
output.Write("<<");
output.RenderEndTag();

//output.AddAttribute(HtmlTextWriterAttribute.Class, "PagerIcon");
output.AddAttribute(HtmlTextWriterAttribute.Title, "上一页");
//output.AddAttribute(HtmlTextWriterAttribute.Href, UrlManager.GetPageUrl(currentPage - 1));
output.AddAttribute(HtmlTextWriterAttribute.Onclick, "$(\"#page-content\").load('" + UrlManager.GetPageUrl(currentPage - 1) + "')");
output.AddAttribute(HtmlTextWriterAttribute.Href, "javascript:void(0);");
output.RenderBeginTag(HtmlTextWriterTag.A);
output.Write("<");
output.RenderEndTag(); //A

output.RenderEndTag(); //Li

showPrevious = false;    // 只显示一次
}

// 添加 “下一页”、“最末页” 的链接
private void AddNextLink(UrlManager UrlManager, HtmlTextWriter output)
{
output.RenderBeginTag(HtmlTextWriterTag.Li);

//output.AddAttribute(HtmlTextWriterAttribute.Class, "pagination page");
output.AddAttribute(HtmlTextWriterAttribute.Title, "下一页");
//output.AddAttribute(HtmlTextWriterAttribute.Href, UrlManager.GetPageUrl(currentPage + 1));
output.AddAttribute(HtmlTextWriterAttribute.Onclick, "$(\"#page-content\").load('" + UrlManager.GetPageUrl(currentPage + 1) + "')");
output.AddAttribute(HtmlTextWriterAttribute.Href, "javascript:void(0);");
output.RenderBeginTag(HtmlTextWriterTag.A);
output.Write(">");
output.RenderEndTag();

//output.AddAttribute(HtmlTextWriterAttribute.Class, "pagination page");
output.AddAttribute(HtmlTextWriterAttribute.Title, "最末页");
//output.AddAttribute(HtmlTextWriterAttribute.Href, UrlManager.GetPageUrl(pageCount));
output.AddAttribute(HtmlTextWriterAttribute.Onclick, "$(\"#page-content\").load('" + UrlManager.GetPageUrl(pageCount) + "')");
output.AddAttribute(HtmlTextWriterAttribute.Href, "javascript:void(0);");
output.RenderBeginTag(HtmlTextWriterTag.A);
output.Write(">>");
output.RenderEndTag();

output.RenderEndTag(); //Li

showNext = false;    // 可有可无，程序会跳出循环
}

// 根据当前页，当前页之前可以显示的页数，算得从第几页开始进行显示
private void SetStartPage()
{

// 如果当前页小于它前面所可以显示的条目数，
// 那么显示第一页就是实际的第一页
if (currentPage <= PreviousPageCount)
{
startPage = 1;
}
else
// 这种情况下 currentPage 前面总是能显示完，
// 要根据后面的长短确定是不是前面应该多显示
{
if (currentPage > PreviousPageCount + 1)
showPrevious = true;

int linkLength = (pageCount - currentPage + 1) + PreviousPageCount;

int startPage = currentPage - PreviousPageCount;

while (linkLength < PreviousPageCount + AfterPageCount + 1 && startPage > 1)
{
linkLength++;
startPage--;
}

this.startPage = startPage;
}
}

// 根据CurrentPage、总页数、当前页之后长度 算得显示的最末页是 第几页
private void SetEndPage()
{
// 如果当前页加上它之后可以显示的页数 大于 总页数，
// 那么显示的最末页就是实际的最末页
if (currentPage + AfterPageCount >= pageCount)
{
endPage = pageCount;
}
else
{

// 这种情况下 currentPage后面的总是可以显示完，
// 要根据前面的长短确定是不是后面应该多显示

int linkLength = (currentPage - startPage + 1) + AfterPageCount;

int endPage = currentPage + AfterPageCount;

while (linkLength < PreviousPageCount + AfterPageCount + 1 && endPage < pageCount)
{
linkLength++;
endPage++;
}

if (endPage < pageCount)
showNext = true;

this.endPage = endPage;
}
}

// 显示在页面上
protected override void Render(HtmlTextWriter output)
{

//////output.AddAttribute(HtmlTextWriterAttribute.Class, CssClass);
//////output.RenderBeginTag(HtmlTextWriterTag.Div);

if (UrlManager == null)
throw new ArgumentNullException("UrlManager 不能为 Null");

// 获取当前页
currentPage = UrlManager.CurrentPageIndex;

// 获取总页数
pageCount = UrlManager.PageCount;

// 获取总记录数
recordCount = UrlManager.RecordCount;

SetStartPage();
SetEndPage();

output.RenderBeginTag(HtmlTextWriterTag.Span);
string str = "记录共" + pageCount + "页，" + recordCount + "条记录，当前" + currentPage + "页，每页" + pageSize + "条。";
output.Write(String.Format("<span class=\"count\">{0}</span>", str));
//output.Write(String.Format(" ( 第<b>{0}</b>页/共<b>{1}</b>页 )", currentPage, pageCount));
output.RenderEndTag();    // Span

output.AddAttribute(HtmlTextWriterAttribute.Class, "pagination page");
output.RenderBeginTag(HtmlTextWriterTag.Ul);

if (recordCount > 1)
{
showPrevious = true;
}

if (currentPage <= endPage)
{
showNext = true;
}

// 循环打印链接
for (int i = startPage; i <= endPage; i++)
{
if (showPrevious)             // 如果需要显示前一页、第一页链接
AddPreviousLink(UrlManager, output);

if (i == currentPage)
{
output.AddAttribute(HtmlTextWriterAttribute.Class, "on");
}
output.RenderBeginTag(HtmlTextWriterTag.Li);
//output.AddAttribute(HtmlTextWriterAttribute.Href, UrlManager.GetPageUrl(i));
string url = UrlManager.GetPageUrl(i);
output.AddAttribute(HtmlTextWriterAttribute.Onclick, "$(\"#page-content\").load('" + url + "')");
output.AddAttribute(HtmlTextWriterAttribute.Href, "javascript:void(0);");
output.RenderBeginTag(HtmlTextWriterTag.A);
output.Write(i);
output.RenderEndTag();    // A

output.RenderEndTag();    // Li

if (i == endPage && showNext)    // 如果需要显示 下一页、最末页 链接
AddNextLink(UrlManager, output);
}

output.RenderEndTag(); //Ul

////////output.RenderEndTag();    // Div
}
}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Web;

namespace PagerControls
{
[Serializable]
public abstract class UrlManager
{

protected int currentPageIndex;            // 当前页码
protected int recordCount;                    // 记录总数
protected int pageSize;                        // 分页大小
protected int pageCount;                    // 总页数
protected string queryParam;                // 传递页数的参数名称

protected UrlManager(int recordCount, int pageSize, string queryParam)
{

if (recordCount < 0)
throw new ArgumentOutOfRangeException("recordCount 应该大于等于 0 !");
if (pageSize <= 0)
throw new ArgumentOutOfRangeException("pageSize 应该大于 0 ！");
if (String.IsNullOrEmpty(queryParam))
throw new ArgumentNullException("queryParam 不能为空！");

// 设置私有变量
this.recordCount = recordCount;
this.pageSize = pageSize;
this.queryParam = queryParam;
this.pageCount = getPageCount(recordCount, pageSize);
this.currentPageIndex = getPageIndex(recordCount, pageCount, queryParam);
}

// 获取页码总数
private int getPageCount(int recordCount, int pageSize)
{
int pageCount;

// 如果记录数为0，也认为有一页(因为至少需要进行一个显示)
if (recordCount == 0)
{
pageCount = 1;
}
else
{
// 计算总页数
if (recordCount % pageSize == 0)
pageCount = recordCount / pageSize;
else
pageCount = (recordCount / pageSize) + 1;
}

return pageCount;
}

// 从Url参数中获得但前页码
private int getPageIndex(int recordCount, int pageCount, string queryParam)
{
if (recordCount == 0)
return 1;        // 如果记录数为0，则显示为第一页

int pageIndex;

// 从Url参数获得当前页码
string queryIndex =
HttpContext.Current.Request.QueryString[queryParam];

// 对页码进行一些校验
if (string.IsNullOrEmpty(queryIndex))
pageIndex = 1;        // 显示第一页
else
{
try
{
pageIndex = Math.Abs(int.Parse(queryIndex));

if (pageIndex == 0)
pageIndex = 1;

// 如果当前页大于总页数，设当前页为最后一页
if (pageIndex > pageCount)
pageIndex = pageCount;
}
catch
{
pageIndex = 1;    // 显示第一页
}
}

return pageIndex;
}

public int PageCount
{
get { return pageCount; }
}

public int RecordCount
{
get { return recordCount; }
}

public int PageSize
{
get { return pageSize; }
}

public int CurrentPageIndex
{
get { return currentPageIndex; }
}
public abstract string GetPageUrl(int pageIndex);
}

// 我提供的默认 DefaultUrlManager，如果你要使用控件，只要继承自UrlManager
// 并覆盖 GetPageUrl() 方法即可。
[Serializable]
public class DefaultUrlManager : UrlManager
{

public DefaultUrlManager(int recordCount, int pageSize, string queryParam)
: base(recordCount, pageSize, queryParam) { }

public DefaultUrlManager(int recordCount, int pageSize)
: this(recordCount, pageSize, "Page") { }

public DefaultUrlManager(int recordCount)
: this(recordCount, 10) { }

// 获得页面Url
public override string GetPageUrl(int pageIndex)
{
string pageUrl = HttpContext.Current.Request.RawUrl;

string pattern = @"(?<=[?&]" + queryParam + @"=)(\d+)\b";
Regex reg = new Regex(pattern, RegexOptions.IgnoreCase);

// 如果找到匹配，也就是URL中含有类似 ?page=3 或者 &page=4 这样的字符串
// 则对后面的数值进行替换
if (reg.IsMatch(pageUrl))
{
pageUrl = reg.Replace(pageUrl, pageIndex.ToString());
}
else
{
string queryString = HttpContext.Current.Request.Url.Query;

if (string.IsNullOrEmpty(queryString))
pageUrl += "?" + queryParam + "=" + pageIndex.ToString();
else
pageUrl += "&" + queryParam + "=" + pageIndex.ToString();
}

return pageUrl;
}
}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace PagerControls
{
// 通过 manager 提供的参数算得 GetRange()类 需要的参数(起始索引index,以及长度count)：
// 然后调用 List<T> 的 GetRange()方法。
public class PagerAdapter<T>
{
List<T> list;

public PagerAdapter(List<T> list)
{
this.list = list;
}

/// <summary>
/// 数据加载完毕后,从 List 集合中取得分页信息
/// </summary>
/// <param name="manager"></param>
/// <returns></returns>
public List<T> GetRange(UrlManager manager)
{
int currentPageIndex = manager.CurrentPageIndex;
int pageSize = manager.PageSize;
int recordCount = manager.RecordCount;
int count, start;

if (currentPageIndex * pageSize > recordCount)
{
count = pageSize - (currentPageIndex * pageSize - recordCount);
}
else
{
count = pageSize;
}

start = (currentPageIndex - 1) * pageSize;

return list.GetRange(start, count);
}

public PagerAdapter() { }

/// <summary>
/// 获取分页信息,自定义扩展方法 SQL 数据库分页方式,取得当前页码
/// </summary>
/// <param name="manager"></param>
/// <param name="_pageIndex"></param>
/// <param name="_pageSize"></param>
public void GetPage(UrlManager manager, ref int _pageIndex, ref int _pageSize)
{
int currentPageIndex = manager.CurrentPageIndex;
int pageSize = manager.PageSize;
int recordCount = manager.RecordCount;

if (currentPageIndex <= 0)
{
_pageIndex = 1;
}
else
{
_pageIndex = currentPageIndex;
}
_pageSize = pageSize;
}
}
}

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Web;

namespace PagerControls.Test
{
public class PagerInfo
{
public static string RequestRowNum(string from, string where)
{
try
{
string bsSQL = "SELECT COUNT(*) RowNum from " + from + where;
return "";
}
catch (Exception ex)
{
throw ex;
}
}

public static DataTable RequestPage(string from, string where, string field, string pageSize, string pageIndex)
{
try
{
string bsSQL = "declare @pagesize integer,@cpage integer; ";
bsSQL += "set @pagesize ="+pageSize+";";
bsSQL += "set @cpage = "+pageIndex+";";

bsSQL += "select top (@pagesize) * from " + from + " where " + where + " AND " + field + " not in(select top ((@cpage - 1) * @pagesize) " + field + " from " + from + " where " + where + " order by " + field + " desc) order by " + field + " desc";

return null;
}
catch (Exception ex)
{
throw ex;
}
}
}
}

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="PagerControls.Test.Default" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div class="mange-company-tab">
<div class="tab-main">
<table class="table table-hover table-striped">
<thead>
<tr>
<th>姓名</th>
<th>账户 </th>
<th>联系电话</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<asp:Literal  ID="literRecord" runat="server"></asp:Literal>
</tbody>
</table>
</div>
<div class="tab-bottom">
<asp:PlaceHolder ID="phHolder" runat="server"></asp:PlaceHolder>
</div>
</div>
</form>
</body>
</html>

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace PagerControls.Test
{
public partial class Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
//RequestUsers();
this.RequestData();
}
}

/// <summary>
/// 数据库分页取数据
/// </summary>
private void RequestData()
{
try
{
string num = PagerInfo.RequestRowNum("Users", " where Status = 1 ");

// 动态使用方式
PagerControl pager = new PagerControl();
pager.pageSize = 10;
// 设置根据Request.QueryString获取页码的参数
DefaultUrlManager manager = new DefaultUrlManager(Convert.ToInt32(num), pager.pageSize, "P");
pager.UrlManager = manager;        // 因为 HttpContext 的原因 UrlManager 不可串行化

// 如果你实现了自己的IUrlManager接口，这里可能是这样：
// pager.UrlManager = new YourUrlManger(133);

//pager.CssClass = "GreenStyle";    // 设置颜色
pager.PreviousPageCount = 3;        // 设置当前页之前显示的最大链接数
pager.AfterPageCount = 3;            // 设置当前也之后可以显示的最大链接数

// 将控件加入到页面上
phHolder.Controls.Add(pager);

// 使用 GetRange() 方法进行分页
PagerAdapter<object> adpter = new PagerAdapter<object>();
int pageIndex = 1;
int pageSize = 10;
adpter.GetPage(manager, ref pageIndex, ref pageSize);
DataTable dt = PagerInfo.RequestPage("Users", " Status = 1 ", "ID",pageSize.ToString(), pageIndex.ToString());
StringBuilder strHtml = new StringBuilder();
for (int i = 0; i < dt.Rows.Count; i++)
{
strHtml.Append("<tr><td>" + dt.Rows[i]["NickName"].ToString() + "</td><td>" + dt.Rows[i]["UserName"].ToString() + "</td><td>" + dt.Rows[i]["Mobile"].ToString() + "</td><td uid=" + dt.Rows[i]["ID"].ToString() + " cid=" + dt.Rows[i]["CompanyID"].ToString() + "><a href=\"javascript:void(0);\" class=\"edit-user\"><i class=\"icon icon-edit\"></i></a><a href=\"javascript:void(0);\" class=\"del-user\"><i class=\"icon icon-del\"></i></a></td></tr>");
}
this.literRecord.Text = strHtml.ToString();
}
catch (Exception)
{
throw;
}
}
}
}