小白写的一个ASP.NET分页控件，仅供娱乐

无聊，第一次写博客，自己动手写了一个分页控件。由于我是新手，有很多地方写得不够好，希望各位大牛多多指正。哈哈哈

/// <summary>
    /// 分页控件
    /// </summary>
    public class Pager
    {
        /// <summary>
        /// 每页记录行数参数名称
        /// </summary>
        public string PageSizeName { get; set; }
        /// <summary>
        /// 分页当前索引页参数名称
        /// </summary>
        public string PageIndexName { get; set; }

        /// <summary>
        /// 每页记录行数
        /// </summary>
        public int PageSize { get; private set; }
        /// <summary>
        /// 分页当前索引页
        /// </summary>
        public int PageIndex { get; private set; }
        /// <summary>
        /// 总记录行数
        /// </summary>
        public int TotalCount { get; private set; }
        /// <summary>
        /// 分页摁钮最大显示数量
        /// </summary>
        public int MaxDisplayCount { get; set; }

        /// <summary>
        /// 是否显示上一页摁钮
        /// </summary>
        public bool ShowPrevPage { get; set; }
        /// <summary>
        /// 是否显示下一页摁钮
        /// </summary>
        public bool ShowNextPage { get; set; }
        /// <summary>
        /// 是否显示第一页摁钮
        /// </summary>
        public bool ShowFirstPage { get; set; }
        /// <summary>
        /// 是否显示最后一页摁钮
        /// </summary>
        public bool ShowLastPage { get; set; }

        /// <summary>
        /// 上一页摁钮显示文本
        /// </summary>
        public string PrevPageText { get; set; }
        /// <summary>
        /// 下一页摁钮显示文本
        /// </summary>
        public string NextPageText { get; set; }
        /// <summary>
        /// 第一页摁钮显示文本
        /// </summary>
        public string FirstPageText { get; set; }
        /// <summary>
        /// 最后一页摁钮显示文本
        /// </summary>
        public string LastPageText { get; set; }

        /// <summary>
        /// 上一页摁钮样式
        /// </summary>
        public string PrevPageClass { get; set; }
        /// <summary>
        /// 下一页摁钮样式
        /// </summary>
        public string NextPageClass { get; set; }
        /// <summary>
        /// 第一页摁钮样式
        /// </summary>
        public string FirstPageClass { get; set; }
        /// <summary>
        /// 最后一页摁钮样式
        /// </summary>
        public string LastPageClass { get; set; }

        /// <summary>
        /// 普通分页摁钮样式
        /// </summary>
        public string ANormalClass { get; set; }
        /// <summary>
        /// 选中分页摁钮样式
        /// </summary>
        public string ACurrentClass { get; set; }

        /// <summary>
        /// 分页控件构造函数
        /// </summary>
        /// <param name="PageIndex">当前选中页索引</param>
        /// <param name="PageSize">每页显示记录行数</param>
        /// <param name="TotalCount">总记录行数</param>
        /// <param name="UrlAndQuery">分页控件回传地址</param>
        public Pager(int PageIndex, int PageSize, int TotalCount)
        {
            this.PageSize = PageSize;
            this.PageIndex = PageIndex;
            this.TotalCount = TotalCount;
            this.MaxDisplayCount = 10;

            this.PageSizeName = "PageSize";
            this.PageIndexName = "PageIndex";
            this.ACurrentClass = "current";

            this.ShowPrevPage = true;
            this.ShowNextPage = true;
            this.ShowFirstPage = true;
            this.ShowLastPage = true;

            this.PrevPageText = "<";
            this.NextPageText = ">";
            this.FirstPageText = "|<";
            this.LastPageText = ">|";
        }

        /// <summary>
        /// 生成分页控件Html代码段
        /// </summary>
        /// <returns></returns>
        public string GeneratePagerHtml()
        {
            // 解析Url，对分页索引键值进行特殊处理
            var request = HttpContext.Current.Request;
            var keys = request.QueryString.AllKeys;
            var paramList = new List<string>();
            if (keys.HasItem())
            {
                foreach (var key in keys)
                {
                    if (key == PageIndexName)
                    {
                        continue;
                    }
                    var value = HttpUtility.UrlEncode(request.QueryString[key]);
                    paramList.Add(string.Format("{0}={1}", key, value));
                }
            }
            paramList.Add(string.Format("{0}=", PageIndexName));
            var query = paramList.Join("&");

            // 对分页摁钮显示的数量和范围做处理
            var PageCount = (int)Math.Ceiling((double)TotalCount / PageSize);
            var startPage = PageIndex - MaxDisplayCount / 2 + 1;
            startPage = startPage < 1 ? 1 : startPage;
            var endPage = startPage + MaxDisplayCount - 1;
            endPage = endPage > PageCount ? PageCount : endPage;
            startPage = endPage - MaxDisplayCount + 1;
            startPage = startPage < 1 ? 1 : startPage;

            var a = "<a href="?{0}{1}" class="{2}">{3}</a>";
            var aString = new StringBuilder();
            for (var nowPage = startPage; nowPage <= endPage; ++nowPage)
            {
                var nowAClass = nowPage == PageIndex ? ACurrentClass : ANormalClass;
                aString.AppendFormat(a, query, nowPage, nowAClass, nowPage);
            }

            // 对上一页摁钮做处理
            string PrevPage = null;
            if (ShowPrevPage)
            {
                var PrevPageIndex = PageIndex - 1;
                PrevPageIndex = PrevPageIndex < 1 ? 1 : PrevPageIndex;
                PrevPage = string.Format(a, query, PrevPageIndex, PrevPageClass, PrevPageText);
            }

            // 对下一页摁钮做处理
            string NextPage = null;
            if (ShowNextPage)
            {
                var NextPageIndex = PageIndex + 1;
                NextPageIndex = NextPageIndex > PageCount ? PageCount : NextPageIndex;
                NextPage = string.Format(a, query, NextPageIndex, NextPageClass, NextPageText);
            }

            // 对第一页摁钮做处理
            string FirstPage = null;
            if (ShowFirstPage)
            {
                FirstPage = string.Format(a, query, 1, FirstPageClass, FirstPageText);
            }

            // 对最后一页摁钮做处理
            string LastPage = null;
            if (ShowLastPage)
            {
                LastPage = string.Format(a, query, PageCount, LastPageClass, LastPageText);
            }

            // 分页控件Html代码段
            var htmlTemp = "<div>{0}{1}{2}{3}{4}</div><div>第 {5}/{6} 页，{7} 条/页，共 {8} 条记录</div>";
            var PagerHtml = string.Format(htmlTemp, FirstPage, PrevPage, aString, NextPage, LastPage, PageIndex, PageCount, PageSize, TotalCount);

            return PagerHtml;
        }
    }

Default.aspx.cs:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using AspNetPager;

namespace Test5
{
    public partial class _Default : System.Web.UI.Page
    {
        public int PageIndex
        {
            get 
            {
                var pageIndex = 1;
                try
                {
                    pageIndex = Convert.ToInt32(Request.QueryString["PageIndex"].ToString());
                }
                catch { }
                return pageIndex;
            }
        }

        public int PageSize
        {
            get
            {
                var PageSize = 8;
                try
                {
                    PageSize = Convert.ToInt32(Request.QueryString["PageSize"].ToString());
                }
                catch { }
                return PageSize;
            }
        }

        protected void Page_Load(object sender, EventArgs e)
        {
            var pager = new Pager(PageIndex, PageSize, 100);
            this.Pager.InnerHtml = pager.CeneratePagerHtml();
        }
    }
}

Default.aspx:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Test5._Default" %>

<!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>
    <style type="text/css">
        .pager a
        {
            color: Blue;
            width: 40px;
            height: 25px;
            border: 1px solid #CCC;
            margin: 0px 5px;
            text-align: center;
            line-height: 25px;
            vertical-align: middle;
            text-decoration: none;
            display: inline-block;
        }
        .pager a:hover, .pager a.current
        {
            background-color: #555;
            color: White;
        }
    </style>
</head>
<body>
    <form id="form1" runat="server">
    <div id="Pager" runat="server" class="pager">
    </div>
    </form>
</body>
</html>