我学习的自定义ASP.NET分页控件

   public class MyPagecontroll
    {
        public int TotalCount { get; set; }//数据的总条数
        public int PageSize { get; set; }//每一页的显示条数
        public int CurrentPageIndex { get; set; }//当前是页码数，也就是说明当前是第几页
        public int MaxPageCount { get; set; }//用于显示当前页码条的数量
        public string UrlFormat { get; set; }//绘制当前的Url
        public int PageCount { get; set; }
        public MyPagecontroll()
        {
            PageSize = Convert.ToInt32(ConfigurationManager.ConnectionStrings["PageSize"].ConnectionString);
            MaxPageCount = Convert.ToInt32(ConfigurationManager.ConnectionStrings["MaxPageCount"].ConnectionString);
            PageCount = (int)Math.Ceiling((double)TotalCount / PageSize);

        }
        public void SetCurrentPageIndex(string pn)
        {
            int tempPageIndex;
            if (int.TryParse(pn, out tempPageIndex))
            {
                CurrentPageIndex = tempPageIndex;
            }
            else
            {
                CurrentPageIndex = 1;
            }
        }
        public string GetPageLink(int page, string txt)
        {
            StringBuilder sb = new StringBuilder();
            string url = UrlFormat.Replace("{n}", page.ToString());
            sb.Append("<a href='").Append(url).Append(">").Append(txt).Append("</>");
            return sb.ToString();
        }
        public string Render()
        {
            StringBuilder sb = new StringBuilder();
            int visibleStart = CurrentPageIndex - MaxPageCount / 2;
            if (visibleStart < 1)
            {
                visibleStart = 1;
            }
            int viszbleEnd = visibleStart + MaxPageCount;
            if (viszbleEnd > PageCount)
            {
                viszbleEnd = 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>");
                sb.Append("<span>上一页</span>");
            }
            for (int i = visibleStart; i <= viszbleEnd; i++)
            {
                if (i == CurrentPageIndex)
                {
                    sb.Append("<span>").Append(i).Append("</span>");
                }
                else
                {
                    sb.Append(GetPageLink(i, i.ToString()));
                }
            }
            if (CurrentPageIndex < PageCount)
            {
                sb.Append(GetPageLink(CurrentPageIndex + 1, "下一页"));
                sb.Append(GetPageLink(PageCount + 1, "末页"));
            }
            else
            {
                sb.Append("<span>下一页</span>");
                sb.Append("<span>末页</span>");
            }
            return sb.ToString();
        }
    }