if (((frmUser)this.Form).pageIndex+1 < ((frmUser)this.Form).pageCount )
{
((frmUser)this.Form).pageIndex += 1;//列表当前显示页数
string Sql = "select top 8 * from [user] where U_ID not in (select top " + (((frmUser)this.Form).pageIndex * 8).ToString() + " U_ID from[user] order by U_ID) order by U_ID";