/// <summary>
        /// 获取流动人口租住信息
        /// </summary>
        /// <param name="queryOption">查询选择信息</param>
        /// <param name="pageindex">当前页的索引编号</param>
        /// <param name="pagesize">页面的数据条数</param>
        /// <returns>IEnumerable类型</returns>
        public IEnumerable<ListUtility.FloatingPopulationDefault> FloatingPopulationInfo(FloatingQueryOption queryOption,int pageindex,int pagesize)
        {

            var q = (from p1 in _floatingLeaseInfo

                    join p2 in _floatinginfo
                    on p1.Idnumber equals p2.Idnumber

                    join p3 in _lessorInfo
                    on p1.Lessor equals p3.Code

                    join p4 in _district
                    on p3.District equals p4.Code

                    join p5 in _subdistrict
                    on p3.SubDistrict equals p5.Code

                    where

                    p1.Idnumber.Contains(queryOption.FloatingIdnumber) &&
                    p2.Name.Contains(queryOption.FloatingName) &&
                    p2.NamePY.Contains(queryOption.FloatingNamePY)

                    select new ListUtility.FloatingPopulationDefault
                    {
                        FloatingName = p2.Name,
                        FloatingNamePY = p2.NamePY,
                        FloatingIdnumber = p2.Idnumber,
                        Age = p2.Age,
                        LessorID = p1.Lessor,
                        LessorName = p3.Name,
                        NativePlace = p2.NativePlace,
                        InDate = p1.InDate,
                        OutDate = p1.LeftDate,
                        Sex = p2.Sex,
                        Address = p4.Name + p5.Name + p3.DoorPlate + "号" + p1.RoomId + "房间"
                    }).Skip(pageindex * pagesize).Take(pagesize);

            return q.ToList<ListUtility.FloatingPopulationDefault>(); 

        }

//注:rlt是查询出来的所有数据的集合
source.Load(rlt.Take(PageSize)); //第一次加载时候的数据,首次加载的时候只要Take每页的数据
//点击下一页时
source.Load(rlt.Take(PageSize)); //这句也要的
if (CurrentPage <(RecordCount-1 )) //这是我点下页的时候
                CurrentPage++; 
          bindingSource.DataSource = rlt.Skip((CurrentPage)* PageSize)).Take(PageSize); //再把这个值赋给数据源,因为我是用bindingSource绑定DataGrideView的