简单实用的分页类(3)

            //计算显示的页码数（当总页码大于MaxPagerCount）的起始页码
            int visibleStart = CurrentPageIndex-MaxPagerCount/2;
            if (visibleStart <1)
            {
                visibleStart = 1;
            }
            //计算显示的页码数（当总页码大于MaxPagerCount）的起始页码
            int visibleEnd = visibleStart + MaxPagerCount;
            //显示最多MaxPagerCount条
            //如果算出来的结束页码大于总页码的话则调整为最大页码
            if (visibleEnd >pageCount)
            {
                visibleEnd = pageCount;
            }
            if (CurrentPageIndex > 1)
            {
                sb.Append(GetPageLink(1, "首页"));
                sb.Append(GetPageLink(CurrentPageIndex - 1, "上一页"));
            }
            else
            {
                sb.Append("<span>首页</span>");
                //如果没有上一页了，则只显示一个上一页的文字，没有超链接
                sb.Append("<span>上一页</span>");
            }
            //绘制可视的页码链接 www.2cto.com
            for (int i = visibleStart; i <= visibleEnd; i++)
            {
                //当前页不是超链接