WebProject.Data.Value'不能在LINQ到实体查询中构造
本文关键字:实体 查询 LINQ Value Data 不能 WebProject | 更新日期: 2023-09-27 18:05:39
我有问题使用复杂类型在我的Linq实体查询。我要做的是生成嵌套json对象,但我有问题使用值作为属性在我的值类
public class ItemManagementViewModel
{
public string FormType { get; set; }
public long FormControllerID { get; set; }
public string FormControllerName { get; set; }
public IEnumerable<Value> values { get; set; }
}
public class Value
{
public long RecordId { get; set; }
public string Name { get; set; }
public long? ParentId { get; set; }
public Value Parent { get; set; }
}
var innerResult = (from innerValue1 in db.Values
join innerValue2 in db.Values on innerValue1.ParentId equals innerValue2.RecordId
join innerValue3 in db.Values on innerValue1.RecordId equals innerValue3.ParentId
where
innerValue1.ParentId
== (from va in db.Values where va.Name == formType select va.RecordId)
.FirstOrDefault()
orderby innerValue1.RecordId
select
new Value
{
RecordId = innerValue3.RecordId,
Name = innerValue2.Name,
ParentId = innerValue3.RecordId
}).ToList();
我使用匿名类型的linq查询
var innerResult = (from innerValue1 in db.Values
join innerValue2 in db.Values on innerValue1.ParentId equals innerValue2.RecordId
join innerValue3 in db.Values on innerValue1.RecordId equals innerValue3.ParentId
where
innerValue1.ParentId
== (from va in db.Values where va.Name == formType select va.RecordId)
.FirstOrDefault()
orderby innerValue1.RecordId
select new
{
RecordId = innerValue3.RecordId,
Name = innerValue2.Name,
ParentId = innerValue3.RecordId
}).ToList();