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 = ;
             }
         }
         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 / ;
             if (visibleStart < )
             {
                 visibleStart = ;
             }
             int viszbleEnd = visibleStart + MaxPageCount;
             if (viszbleEnd > PageCount)
             {
                 viszbleEnd = PageCount;
             }
             if (CurrentPageIndex > )
             {
                 sb.Append(GetPageLink(, "首页"));
                 sb.Append(GetPageLink(CurrentPageIndex - , "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 + , "下一页"));
                 sb.Append(GetPageLink(PageCount + , "末页"));
             }
             else
             {
                 sb.Append("<span>下一页</span>");
                 sb.Append("<span>末页</span>");
             }
             return sb.ToString();
         }
     }