服务端获取单据类型

单据中不存在 BillTypeID_Id 时，使用 BusinessDataServiceHelper.Load 方法获取数据
List _sector = new List();
_sector.Add(new SelectorItemInfo("FBillTypeID"));
OQLFilter _filter = OQLFilter.CreateHeadEntityFilter(string.Format("FID={0}", e.DataEntitys[0]["Id"]));
DynamicObject[] lotList = BusinessDataServiceHelper.Load(this.Context, this.BusinessInfo, _sector, _filter);