如何處理外鍵關係實體框架MVC

public class UserCommentry 
{ 
    [Key] 
    public int ID { get; set; } 
    [ForeignKey("AccountID")] 
    public int AccountID { get; set; } 
    public virtual Account account { get; set; } 
    public Int64 TransferID { get; set; } 
}

主鍵字段如何處理外鍵關係實體框架MVC

public class Account 
{ 
    [Key] 
    public int ID { get; set; } 
    public int code{ get; set; } 
    public Int64 TransferID { get; set; }

錯誤：

The property 'AccountID' cannot be configured as a navigation property. The property must be a valid entity type and the property should have a non-abstract getter and setter. For collection properties the type must implement ICollection where T is a valid entity type.

來源

2016-12-02 Mark Evans

你已經把'ForeignKey'屬性放在錯誤的地方。只需將其移至「帳戶」屬性的正上方即可。 –

簡短的回答：那是因爲navigarion屬性類型應該爲你想要的它指向。如果我想創建與帳戶的關係，我會做這種方式：

public class UserCommentry 
    { 
     [Key] 
     public int ID { get; set; } 
     public Account Account{ get; set; } 
     public virtual Account account { get; set; } 

     public Int64 TransferID { get; set; } 
    }

然後讓上下文知道它使用OnModelCreating。你可以在這裏閱讀更多http://www.entityframeworktutorial.net/code-first/configure-one-to-many-relationship-in-code-first.aspx

來源

2016-12-02 18:00:38

如何處理外鍵關係實體框架MVC

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