首先在更改ForeignKey(CommodityGroupID)時自動獲取CommodityGroup的商品對象,但是在EF Code First(4.3.1)中沒有這樣做。實體框架數據庫優先和EF代碼先在EF數據庫中獲取關係對象編號
public class Commodity
{
public int CommodityID { get; set; }
public string MadeBy { get; set; }
public decimal ServiceTimePrice { get; set; }
public decimal QCPrice { get; set; }
public int ServicePoint { get; set; }
public string Note { get; set; }
public int CommodityGroupID { get; set; }
[ForeignKey("CommodityGroupID")]
public virtual CommodityGroup CommodityGroup { get; set; }
}
public class CommodityGroup
{
public int CommodityGroupID { get; set; }
public string CommodityGroupName { get; set; }
public virtual ICollection<Commodity> Commodities { get; set; }
}
此屬性在Edmx文件(數據庫優先)中定義,我應該首先在ef代碼中定義此代碼?
[BrowsableAttribute(false)]
[DataMemberAttribute()]
public EntityReference<CommodityGroup> CommodityGroupReference
{
get
{
return ((IEntityWithRelationships)this).RelationshipManager.GetRelatedReference<CommodityGroup>("GaamRepairModel.FK_Commodity_CommodityGroup", "CommodityGroup");
}
set
{
if ((value != null))
{
((IEntityWithRelationships)this).RelationshipManager.InitializeRelatedReference<CommodityGroup>("GaamRepairModel.FK_Commodity_CommodityGroup", "CommodityGroup", value);
}
}
}
你是否啓用延遲加載? – 2012-08-08 05:14:04
你可以請你的代碼改變/獲取數據? – 2012-08-08 05:20:03
是的,LazyLoadingEnabled = true – Hono 2012-08-09 19:55:43