分页导航区域算法代码

CS页面要定义几个 protected 变量，以便在HTML中能访问到

 

<td id="tbPageIndex" runat="server">
                <%
                      //不是第一页时，显示 上一页
                      if (pageIndex > 1)
                      {
                        %>
                        <a href="javascript:SetPageNavigation('<%=pageIndex - 1 %>');" style="color:Maroon;"><asp:Label ID="lblPrev" runat="server" Text="Prev"></asp:Label></a>&nbsp;
                        <%  
                      }
                      
                      int iStart = 0; //显示的起始页号;
                      int iEnd = 0;   //显示的终止页号;
                      

                        if (pageCount <= 10)
                        {
                            iStart = 1;
                            iEnd = pageCount;
                        }
                        else if (pageIndex == 1)
                        {
                            iStart = 1;
                            if (pageCount > 10)
                                iEnd = iStart + 9;
                            else
                                iEnd = pageCount;
                        }
                        else if (pageIndex <= 6)
                        {
                            iStart = pageIndex - 1;
                            if (pageCount - iStart < 9)
                                iEnd = pageCount;
                            else 
                                iEnd = iStart + 9;
                        }
                        else if (pageCount - pageIndex < 4)
                        {
                            if (pageCount - pageIndex > 0)
                                iEnd = pageIndex + 1;
                            else
                                iEnd = pageCount;
                                
                            if (iEnd - 9 <= 0)
                                iStart = 1;
                            else
                                iStart = iEnd - 9;
                        }
                        else
                        {
                            iStart = pageIndex - 5;
                            iEnd = pageIndex + 4;
                        }
                      for(int i=iStart;i<=iEnd;i++)
                      { 
                         if( i == pageIndex) 
                         { Response.Write("<strong>[" + i +"]</strong>&nbsp;");}
                         else
                         {
                        %>
                        <a href="javascript:SetPageNavigation('<%=i%>');" style="color:Maroon;"><%=i%></a>&nbsp;
                        <%
                         }
                      }
                      if (pageIndex < pageCount)
                      {
                        %>
                        <a href="javascript:SetPageNavigation('<%=pageIndex + 1 %>');" style="color:Maroon;"><asp:Label ID="lblNext" Text="Next" runat="server"></asp:Label></a>&nbsp;
                        <%       
                      }
                    %>
                    <span style="padding-left:20px; color:Purple;"><%=pageIndex%>/<%=pageCount%></span>
</td>