遞歸加載EF 4.1中的stackoverflow POCO

Question

我有一個EF 4.1 POCO類與Vehicle和VehicleOwner。

當我加載包括車輛在內的VehicleOwner時，車輛仍然加載VehicleOwner，當您使用Mapper時，它最終會出現在堆棧溢出異常中。

下面是代碼示例

public class VehicleOwner : IVehicleOwner 
    { 

    [Key,DatabaseGenerated(DatabaseGeneratedOption.Identity),ScaffoldColumn(false)] 
    public int VehicleOwnerId { get; set; } 
    [Required,DisplayName("First Name")] 
    public string FirstName{ get; set; } 
    [Required,DisplayName("Last Name")] 
    public string LastName { get; set; } 

    public virtual ICollection<Vehicle> Vehicles { get; set; } 

} 

public class Vehicle 
{ 
    public Vehicle() 
    { 
     this.RecoveredVehicles = new HashSet<RecoveredVehicles>(); 
    } 

    [Key,DatabaseGenerated(DatabaseGeneratedOption.Identity)] 
    public int VehicleId { get; set; } 
    [DisplayName("Identification Number")] 
    public string IdentificationNumber { get; set; } 
    [Required] 
    [DisplayName("Owner ID")] 
    public int VehicleOwnerId { get; set; } 
    [Required] 
    [ScaffoldColumn(false)] 
    public byte[] RowVersion { get; set; } 


    public virtual VehicleOwner VehicleOwner { get; set; } 
    public virtual ICollection<RecoveredVehicle> RecoveredVehicles { get; set; } 
} 

//當我做到這一點的車輛將會被填充，當您展開VehicleOwner再次填充車輛。

public VehicleOwner GetVehicleOwner(int vehicleOwnerID) 
{ 
    objDataContext.Configuration.ProxyCreationEnabled = false; 
    return (from p in objDataContext.VehicleOwners.Include("Vehicles") where p.VehicleOwnerId == vehicleOwnerID select p).FirstOrDefault<VehicleOwner>();   
} 

有沒有辦法可以阻止這個遞歸循環。

謝謝

Answer 1

沒有遞歸循環。 Vehicle指向原始VehicleOwner。它只是返回引用，並且無法避免（僅當您刪除了引用導航屬性時）。