在子類db-table中存儲基本抽象類屬性

Question

我在存儲來自我的抽象類的屬性時存在一些問題，構造函數似乎工作得很好。不過，我無法將基本屬性存儲在我的子類數據庫表中。

public abstract class Vehicle : IComparable<Vehicle>, IComparable { 
    public Int16 VehicleID; 
    public DateTime ProductionDate; 

    public Vehicle(Int16 _ Vehicle ID,DateTime _ProductionDate) 
    { 
     this.AccidentID = _ AccidentID; 
     this.ProductionDate = _ProductionDate; 
    } 

    int IComparable.CompareTo(object other) { 
     return CompareTo((Vehicle)other); 
    } 
    public int CompareTo(Vehicle other){ 
     return this.ProductionDate.CompareTo(other.ProductionDate); 
    } 

    public Vehicle() 
    {} 
} 

public class Car : Vehicle 
{ 
    public Car() 
    { 
    } 

    public Car (Int16 _VehicleID,DateTime _ProductionDate, Int16 _CarAttribute1, Int16 _CarAttribute2):base(_Vehicle ID,_ProductionDate) 
    { 
     this.AccidentID = _ AccidentID; 
     this.ProductionDate = _ProductionDate; 
     this.CarAttribute1 = _CarAttribute1 
     this.CarAttribute2 = _CarAttribute2 

    } 

    [PrimaryKey, AutoIncrement, Column("Attribute1")] 
    public Int16 CarAttribute1{ get; set;} 
    [Column("Attribute2")] 
    public Int16 CarAttribute2{ get; set;} 
} 

我對C＃很新，所以一些指導讚賞:)我錯過了什麼？

Answer 1

在基類，你應該使用屬性而不是字段，因此調整的基礎類是這樣的：

public abstract class Vehicle : IComparable<Vehicle>, IComparable { 

public Int16 AccidentID { get; set; } 
public DateTime ProductionDate { get; set;} 

public Vehicle(Int16 _ Vehicle ID,DateTime _ProductionDate) 
{ 
    this.AccidentID = _ AccidentID; 
    this.ProductionDate = _ProductionDate; 
} 

int IComparable.CompareTo(object other) { 
    return CompareTo((Vehicle)other); 
} 
public int CompareTo(Vehicle other){ 
    return this.ProductionDate.CompareTo(other.ProductionDate); 
} 

public Vehicle() 
{} 

}

，所以我改變：

public Int16 VehicleID; 
public DateTime ProductionDate; 

到：

public Int16 AccidentID { get; set; } 
public DateTime ProductionDate { get; set;} 

BTW：您在基類中有VehicleID字段，但在構造函數中，您將值設置爲AccidentID而不是VehicleID。我認爲這只是描述中的一個錯字，對吧？所以我用AccidentID作爲屬性名稱，所以請檢查它是否正確。