6
我不确定发生了什么变化，但在回到几周前正在处理的应用程序后，我的.Include()调用不再适用于我的相关表之一。奇怪的部分是它适用于不同的表格。下面是一些代码注释显示什么我的结果是：包括不与实体框架查询一起工作
//Get the order and nothing else.
using (OrderEntity orderContext = new OrderEntity(OrdersConnectionString)) {
var query = from order in orderContext.ShippingOrders
where order.ShipperId == shippingId
select order;
//I got a value!
shippingOrder = query.ToList().FirstOrDefault();
}
//Get the line item and nothing else.
using (OrderEntity orderContext = new OrderEntity(OrdersConnectionString)) {
var query = from orderItem in orderContext.ShippingOrderItems
where orderItem.ShipperId == shippingId
select orderItem;
//I got a value!
shippingOrderItems = query.ToList();
}
这里是我很困惑：
//Get the order *AND* the line item
using (OrderEntity orderContext = new OrderEntity(OrdersConnectionString)) {
var query = from order in orderContext.ShippingOrders.Include("ShippingOrderItems")
where order.ShipperId == shippingId
select order;
//I get a ShippingOrder result, but no items are returned. I used the SQL Server Profiler and saw the SQL that got executed; it contains the item, EF just isn't loading the object.
shippingOrder = query.ToList().FirstOrDefault();
}
我能够找回结果不同的相关表。这让我认为EF缺少我的订单和订单项表之间的关系，但是，我不确定我如何解决该问题。
编辑：这里是Order实体
/// <summary>
/// No Metadata Documentation available.
/// </summary>
[EdmEntityTypeAttribute(NamespaceName="OrderModel", Name="ShippingOrder")]
[Serializable()]
[DataContractAttribute(IsReference=true)]
public partial class ShippingOrder : EntityObject
{
#region Factory Method
/// <summary>
/// Create a new ShippingOrder object.
/// </summary>
/// <param name="shipperId">Initial value of the ShipperId property.</param>
public static ShippingOrder CreateShippingOrder(global::System.String shipperId)
{
ShippingOrder shippingOrder = new ShippingOrder();
shippingOrder.ShipperId = shipperId;
return shippingOrder;
}
#endregion
#region Primitive Properties
/// <summary>
/// No Metadata Documentation available.
/// </summary>
[EdmScalarPropertyAttribute(EntityKeyProperty=true, IsNullable=false)]
[DataMemberAttribute()]
public global::System.String ShipperId
{
get
{
return _ShipperId;
}
set
{
if (_ShipperId != value)
{
OnShipperIdChanging(value);
ReportPropertyChanging("ShipperId");
_ShipperId = StructuralObject.SetValidValue(value, false);
ReportPropertyChanged("ShipperId");
OnShipperIdChanged();
}
}
}
private global::System.String _ShipperId;
partial void OnShipperIdChanging(global::System.String value);
partial void OnShipperIdChanged();
/// <summary>
/// No Metadata Documentation available.
/// </summary>
[EdmScalarPropertyAttribute(EntityKeyProperty=false, IsNullable=true)]
[DataMemberAttribute()]
public global::System.String OrderNumber
{
get
{
return _OrderNumber;
}
set
{
OnOrderNumberChanging(value);
ReportPropertyChanging("OrderNumber");
_OrderNumber = StructuralObject.SetValidValue(value, true);
ReportPropertyChanged("OrderNumber");
OnOrderNumberChanged();
}
}
private global::System.String _OrderNumber;
partial void OnOrderNumberChanging(global::System.String value);
partial void OnOrderNumberChanged();
/// <summary>
/// No Metadata Documentation available.
/// </summary>
[EdmScalarPropertyAttribute(EntityKeyProperty=false, IsNullable=true)]
[DataMemberAttribute()]
public Nullable<global::System.DateTime> OrderDate
{
get
{
return _OrderDate;
}
set
{
OnOrderDateChanging(value);
ReportPropertyChanging("OrderDate");
_OrderDate = StructuralObject.SetValidValue(value);
ReportPropertyChanged("OrderDate");
OnOrderDateChanged();
}
}
private Nullable<global::System.DateTime> _OrderDate;
partial void OnOrderDateChanging(Nullable<global::System.DateTime> value);
partial void OnOrderDateChanged();
/// <summary>
/// No Metadata Documentation available.
/// </summary>
[EdmScalarPropertyAttribute(EntityKeyProperty=false, IsNullable=true)]
[DataMemberAttribute()]
public global::System.String CustomsComment
{
get
{
return _CustomsComment;
}
set
{
OnCustomsCommentChanging(value);
ReportPropertyChanging("CustomsComment");
_CustomsComment = StructuralObject.SetValidValue(value, true);
ReportPropertyChanged("CustomsComment");
OnCustomsCommentChanged();
}
}
private global::System.String _CustomsComment;
partial void OnCustomsCommentChanging(global::System.String value);
partial void OnCustomsCommentChanged();
#endregion
#region Navigation Properties
/// <summary>
/// No Metadata Documentation available.
/// </summary>
[XmlIgnoreAttribute()]
[SoapIgnoreAttribute()]
[DataMemberAttribute()]
[EdmRelationshipNavigationPropertyAttribute("OrderModel", "FK_ShippingOrderItem_ShippingOrder", "ShippingOrderItem")]
public EntityCollection<ShippingOrderItem> ShippingOrderItems
{
get
{
return ((IEntityWithRelationships)this).RelationshipManager.GetRelatedCollection<ShippingOrderItem>("OrderModel.FK_ShippingOrderItem_ShippingOrder", "ShippingOrderItem");
}
set
{
if ((value != null))
{
((IEntityWithRelationships)this).RelationshipManager.InitializeRelatedCollection<ShippingOrderItem>("OrderModel.FK_ShippingOrderItem_ShippingOrder", "ShippingOrderItem", value);
}
}
}
/// <summary>
/// No Metadata Documentation available.
/// </summary>
[XmlIgnoreAttribute()]
[SoapIgnoreAttribute()]
[DataMemberAttribute()]
[EdmRelationshipNavigationPropertyAttribute("OrderModel", "FK_ShippingOrderItemTracking_ShippingOrder", "ShippingOrderTracking")]
public EntityCollection<ShippingOrderTracking> ShippingOrderTrackings
{
get
{
return ((IEntityWithRelationships)this).RelationshipManager.GetRelatedCollection<ShippingOrderTracking>("OrderModel.FK_ShippingOrderItemTracking_ShippingOrder", "ShippingOrderTracking");
}
set
{
if ((value != null))
{
((IEntityWithRelationships)this).RelationshipManager.InitializeRelatedCollection<ShippingOrderTracking>("OrderModel.FK_ShippingOrderItemTracking_ShippingOrder", "ShippingOrderTracking", value);
}
}
}
#endregion
}
远射...你的ShippingOrderItem类有空的构造函数吗？ – Phil 2012-07-16 14:23:47
你能发布ShippingOrder实体吗？ ShippingOrderItem的属性（和配置）的名称是什么？ – 2012-07-16 14:24:38
@PhilCartmell - 仅供参考：我正在使用自动生成的代码（数据库优先）。我看了一下这个类，并没有指定构造函数，所以，C＃魔法让我留下了一个空的构造函数。 – 2012-07-16 14:27:57