一个比较好看的网页翻页效果

显示效果：1 2 3 4 5>> ，点击了４后又显示 ，4 5 6 7 8>>并转到第４页 ，如果总共有１0页，  显示到6 7 8 9 10>>就不再显示了。
---------------------------------------------------------------------
.aspx
<tr> <td align="center"><div class="tbl">
            【当前页:<asp:Label ID="lblcurpg" runat="server"></asp:Label> |  总记录数:<asp:Label ID="lblRecord" runat="server"></asp:Label>】
        <%=strpg %>
    </div></td>
</tr>

.cs
protected string strpg = string.Empty;
        protected string strUrl = "aa.aspx";
        protected int PgSize = 15;
        protected string wherestr = string.Empty;
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                int curpg = GetIdx();
                if (Request.QueryString["val"] != null)
                {
                    wherestr = Request.QueryString["val"].ToString();
                    string strVal = "where NewsTitle like '%" + wherestr + "%' ";
                    Prepg(curpg, strVal);
                }
                else
                {
                    Prepg(curpg, wherestr);
                }

                 }
        }

        #region 加载页面
        protected void Prepg(int Idx, string strWhere)
        {
            .....//获取一个dataset
            int RecordCount = Convert.ToInt32(ds.Tables[1].Rows[0].ItemArray[0].ToString());
            strpg = Getpgstr(RecordCount, PgSize, Idx, strUrl);
            lblcurpg.Text = Idx.ToString();
            lblRecord.Text = RecordCount.ToString();
        }
        #endregion

        #region 获取分页控件
        protected string Getpgstr(int total, int per, int page, string query_string)
        {
            return pagination(total, per, page, query_string);
        }
        #endregion

        protected void btnSearch_Click(object sender, EventArgs e)
        {
            Response.Redirect(strUrl + "?val=" + txtNew.Text);
        }

        #region 获取当前页
        protected int GetIdx()
        {
            int curpg;
            if (Request.QueryString["page"] == null)
            {
                curpg = 1;
            }
            else
            {
                curpg = Convert.ToInt32(Request.QueryString["page"].ToString());
            }
            return curpg;
        }
        #endregion
public static string pagination(int total, int per, int page, string query_string)
        {
            //page表是当前页
            //per表示每页显示记录数
            int allpage = 0;
            int next = 0;
            int pre = 0;
            int startcount = 0;
            int endcount = 0;
            string pagestr = "";
            if (page < 1) { page = 1; }
            //计算总页数
            if (per != 0)
            {
                allpage = (total / per);
                allpage = ((total % per) != 0 ? allpage + 1 : allpage);
                allpage = (allpage == 0 ? 1 : allpage);
            }
            next = page + 1;
            pre = page - 1;
            startcount = (page + 5) > allpage ? allpage - 9 : page - 4;//中间页起始序号
            //中间页终止序号
            endcount = page < 5 ? 10 : page + 5;
            if (startcount < 1) { startcount = 1; } //为了避免输出的时候产生负数，设置如果小于1就从序号1开始
            if (allpage < endcount) { endcount = allpage; }//页码+5的可能性就会产生最终输出序号大于总页码，那么就要将其控制在页码数之内
            pagestr = "共" + allpage + "页&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;";

                pagestr += page > 1 ? "<a href=\"" + query_string + "?page=1\">首页</a>&nbsp;&nbsp;<a href=\"" + query_string + "?page=" + pre + "\">上一页</a>" : "<B>首页 上一页</B>";
                //中间页处理，这个增加时间复杂度，减小空间复杂度
                for (int i = startcount; i <= endcount; i++)
                {
                    pagestr += page == i ? "&nbsp;&nbsp;<B>" + i + "<B>" : "&nbsp;&nbsp;<a href=\"" + query_string + "?page=" + i + "\">" + i + "</a>";
                }
                pagestr += page != allpage ? "&nbsp;&nbsp;<a href=\"" + query_string + "?page=" + next + "\">下一页</a>&nbsp;&nbsp;<a href=\"" + query_string + "?page=" + allpage + "\">末页</a>" : " 下一页 末页";

            return pagestr;
        }