分页代码

       /// <summary>
        /// 获得伪静态页码显示链接
        /// </summary>
        /// <param name="curPage">当前页数</param>
        /// <param name="countPage">总页数</param>
        /// <param name="url">超级链接地址</param>
        /// <param name="extendPage">周边页码显示个数上限</param>
        /// <param name="forumrewrite">当前版块是否使用URL重写</param>
        /// <returns>页码html</returns>
        public static string GetStaticPageNumbers(int curPage, int countPage, string url, string expname, int extendPage, int forumrewrite)
        {
            int startPage = 1;
            int endPage = 1;

            string t1 = "<font><a href=\"" + url + "-" + (curPage - 1) + expname + "\">< 上一页</a></font>";
            string t2 = "<font><a href=\"" + url + "-" + (curPage + 1) + expname + "\">下一页 ></a></font>";
            string more = "<font>…</font>";
            if (countPage < 1) countPage = 1;
            if (extendPage < 3) extendPage = 2;

            if (countPage > extendPage)
            {
                if (curPage - (extendPage / 2) > 0)
                {
                    if (curPage + (extendPage / 2) < countPage)
                    {
                        startPage = curPage - (extendPage / 2);
                        endPage = startPage + extendPage - 1;
                    }
                    else
                    {
                        endPage = countPage;
                        startPage = endPage - extendPage + 1;
                        if (curPage == endPage)
                            t2 = " <font class=\"h_bkd\">下一页 ></font>";
                    }
                }
                else
                {
                    endPage = extendPage;
                    if (curPage == 1)
                        t1 = " <font class=\"h_bkd\">< 上一页</font>";
                }
            }
            else
            {
                startPage = 1;
                endPage = countPage;
                if (curPage == 1)
                    t1 = " <font class=\"h_bkd\">< 上一页</font>";
                if (curPage == endPage)
                    t2 = " <font class=\"h_bkd\">下一页 ></font>";
            }

            StringBuilder s = new StringBuilder("");

            s.Append(t1);
            if (startPage > 1)
            {
                s.Append("<font><a href=\"" + url + "-1" + expname + "\">1</a></font>" + more);
            }

            for (int i = startPage; i <= endPage; i++)
            {
                if (i == curPage)
                {
                    s.Append("<font class=\"fenye_qd\">" + i + "</font>");
                }
                else
                {
                    s.Append("<font><a href=\"");
                    s.Append(url);
                    if (i != 1)
                    {
                        s.Append("-");
                        s.Append(i);
                    }
                    s.Append(expname);

                    s.Append("\">");
                    s.Append(i);
                    s.Append("</a></font>");
                }
            }
            if (endPage < countPage)
                s.Append(more + "<font><a href=\"" + url + "-" + countPage + expname + "\">" + countPage + "</a></font>");
            s.Append(t2);
            s.Append("<font class=\"fy_top\"><a href=\"#\"><img src=\"/images/top_03.gif\" width=\"57\" border=\"0\" height=\"20\" alt=\"返回头部\" /></a></font>");
            return s.ToString();
        }
        /// <summary>
        /// 获得动态页码显示链接
        /// </summary>
        /// <param name="curPage">当前页数</param>
        /// <param name="countPage">总页数</param>
        /// <param name="url">超级链接地址</param>
        /// <param name="extendPage">周边页码显示个数上限</param>
        /// <param name="pagetag">页码标记</param>
        /// <param name="anchor">锚点</param>
        /// <returns>页码html</returns>
       
        public static string GetPageNumbers(int curPage, int countPage, string url, int extendPage, int totals, int pageSize)
        {
            string pagetag = "curpage";
            int startPage = 1;
            int endPage = 1;

            if (url.IndexOf("?") > 0)
            {
                url = url + "&";
            }
            else
            {
                url = url + "?";
            }

            //string t3 = "<font><a href=\"" + url + pagetag + "=1&pagesize="+pageSize+" \">首页</a></font>";
            //string t4 = "<font><a href=\"" + url + pagetag + "=" + countPage + "&pagesize=" + pageSize + " \">尾页</a></font>";

            string t1 = "<font><a href=\"" + url + pagetag + "=" + (curPage - 1) + "&pagesize=" + pageSize + "\">< 上一页</a></font>";
            string t2 = "<font><a href=\"" + url + pagetag + "=" + (curPage + 1) + "&pagesize=" + pageSize + "\">下一页 ></a></font>";
            string more = "<font>...</font>";
            if (countPage < 1) countPage = 1;
            if (extendPage < 3) extendPage = 2;

            if (countPage > extendPage)
            {
                if (curPage - (extendPage / 2) > 0)
                {
                    if (curPage + (extendPage / 2) < countPage)
                    {
                        startPage = curPage - (extendPage / 2);
                        endPage = startPage + extendPage - 1;
                    }
                    else
                    {
                        endPage = countPage;
                        startPage = endPage - extendPage + 1;
                        if (curPage == endPage)
                        {
                            t2 = "<font class=\"h_bkd\">下一页 ></font>";
                            //t4 = "<font class=\"h_bkd\">尾页</font>";
                        }
                    }
                }
                else
                {
                    endPage = extendPage;
                    if (curPage == 1)
                    {
                        t1 = "<font class=\"h_bkd\">< 上一页</font>";
                        // t3 = "<font class=\"h_bkd\">首页</font>";
                    }
                }
            }
            else
            {
                startPage = 1;
                endPage = countPage;
                if (curPage == 1)
                {
                    t1 = "<font class=\"h_bkd\">< 上一页</font>";
                    // t3 = "<font class=\"h_bkd\">首页</font>";
                }
                if (curPage == endPage)
                {
                    t2 = "<font class=\"h_bkd\">下一页 ></font>";
                    //t4 = "<font class=\"h_bkd\">尾页</font>";
                }
            }
            StringBuilder s = new StringBuilder("");
            //s.Append("共" + totals + "条记录  ");
            //s.Append(t3);
            s.Append(t1);
            if (startPage > 1)
            {

                s.Append("<font><a href=\"" + url + pagetag + "=1&pagesize=" + pageSize + "\"> 1 " + more + " </a></font>");
            }

            for (int i = startPage; i <= endPage; i++)
            {
                if (i == curPage)
                {
                    s.Append("<font class=\"fenye_qd\">" + i + "</font>");
                }
                else
                {
                    s.Append("<font><a href=\"");
                    s.Append(url);
                    s.Append(pagetag);
                    s.Append("=");
                    s.Append(i);
                    s.Append("&pagesize=" + pageSize + "\">");
                    s.Append(i);
                    s.Append("</a><font>");
                }
            }

            if (endPage < countPage)
                s.Append("<font><a href=\"" + url + pagetag + "=" + countPage + "&pagesize=" + pageSize + "\">"+ more + countPage + "</a></font>");
            s.Append(t2);
            //s.Append(t4);
            s.Append(ReturnPageString(countPage, curPage));
            s.Append(" <input type=\"text\" size=\"2\" value=\"" + pageSize + "\" onchange=\"Utils.SetPageSize(this);\" />条/页");

            return s.ToString();
        }

        /// <summary>
        /// 输出回转页面
        /// </summary>
        /// <param name="countPage">总页数</param>
        /// <param name="curPage">当前页码</param>
        /// <returns></returns>
        private static string ReturnPageString(int countPage, int curPage)
        {
            string html = " <font>到第{0}页</font>";
            string str = "<select name=\"turnpage\" id=\"turnpage\" class=\"fengyi select\" onchange=\"Utils.TurnPage(this);\">";
            for (int i = 1; i <= countPage; i++)
            {
                if (i == curPage)
                    str += string.Format("<option value=\"{0}\" selected=\"selected\" >{0}</option>", i);
                else
                    str += string.Format("<option value=\"{0}\">{0}</option>", i);
            }
            str += "</select>";
            return string.Format(html, str);
        }

        /// <summary>
        /// 取得动态地址
        /// </summary>
        /// <param name="indexPage">当前页码</param>
        /// <param name="pageCount">总页数</param>
        /// <param name="url">页面地址</param>
        /// <returns></returns>
        public static string GetPageHeadString(int indexPage, int pageCount, string url)
        {
            StringBuilder builder = new StringBuilder();
            if (url.LastIndexOf("?") == -1)
                url = url + "?";
            else
                url = url + "&";
            builder.Append("<font class=\"fy_shuzi\">" + indexPage + "/" + pageCount + "</font>");
            if (indexPage == 1)
                builder.Append("<img height=\"17\" border=\"0\" width=\"16\" src=\"/images/sp_botton_03.gif\" alt=\"上一页\" class=\"middle\"> ");
            else
                builder.Append("<a href=\"" + url + "curpage=" + (indexPage - 1).ToString() + "\"><img height=\"17\" border=\"0\" width=\"16\" src=\"/images/sp_botton_032.gif\" alt=\"上一页\" class=\"middle\"></a> ");

            if (pageCount != indexPage)
            {
                builder.Append(" <a href=\"" + url + "curpage=" + (indexPage + 1).ToString() + "\"><img height=\"17\" border=\"0\" width=\"51\" src=\"/images/sp_botton_05.gif\" alt=\"下一页\" class=\"middle\"></a>");
            }
            else
            {
                builder.Append(" <img height=\"17\" border=\"0\" width=\"51\" src=\"/images/xiahui.gif\" alt=\"下一页\" class=\"middle\">");
            }
            return builder.ToString();
        }