以下代码对我有用:
var query0 = DB.Plan
.Include("UserCreate")
.Include("UserUpdate")
.Include("PlanTemplate")
.Select(p => new
{
plan = p,
planItems = p.PlanItems.Where(pi => pi.IsCommited == true && pi.IsLocked == false)
});
var query2 = query0.AsEnumerable().Where(m => m.planItems.Count() > 0).Select(m => m.plan);
但是与我想要的另一个实体相关的 planItems,以下代码对我不起作用:
var query0 = DB.WorkEffortPlan
.Include("UserCreate")
.Include("UserUpdate")
.Include("PlanTemplate")
.Select(p => new
{
plan=p,
planItems = DB.PlanItem
.Include("UserResponsiblePerson")
.Include("TemplateItem")
.Include("ItemState")
.Where(pi => pi.PlanID == p.PlanID && pi.IsCommited == true && pi.IsLocked == false)
});
var query2 = query0.AsEnumerable().Where(m => m.planItems.Count() > 0).Select(m => m.plan);
vs 编译器运行正常,但是当执行此代码时,我在 query0 中得到 NullReferenceException。
是否有任何 linq 解决方案来过滤子实体及其相关实体?