实体框架 - 在数据库中保存枚举的ICollection [英] Entity Framework - Save ICollection of Enumeration in database

问题描述

我有一个类的属性类型 ICollection< Enum> 。

例如我们有以下枚举：

  public enum CustomerType 
 {
 VIP，
 FrequentCustomer，
 BadCustomer 
} 
  
 
 
 
我们还有以下类：
  public class Customer 
 {
 public int Id {get; set; } 
 public string FirstName {get; set; } 
 public string LastName {get; set; } 
 public ICollection< CustomerType> CustomerAtrributes {get; set; } 
} 
  
如何存储属性 CustomerAtrributes  
 
 
 
例如，我在寻找类似以下的东西：
  CustomerId | FirstName |姓氏CustomerType | 
 1 | Bob |史密斯| VIP | 
 1 | Bob |史密斯|常见客户| 
 2 |迈克|约旦|坏客户| 
  
编辑：我使用EntityFramework 6使用CodeFirst方法将我的对象存储在数据库中。 / p> 
 
 
编辑：朋友发现了一个可能的重复： ef 5 codefirst枚举集合不是在数据库中生成。但是，如果您有任何不同的想法或解决方法，请发布。 
解决方案
枚举仍然是原始类型，特别是整数。正如你的 Costumer 类不能有一个映射到数据库中的东西的 ICollection< int> 没有枚举的集合。
 
 
 
您必须创建一个CostumerType类并重命名枚举：
  public enum TypesOfCostumer // example name 
 {
 VIP，
 FrequentCustomer，
 BadCustomer 
} 
 
 public class CostumerType 
 {
 public int Id {get;组; } 
 public TypesOfCostumer Type {get; set;} 
} 
  
 
I have a class with a property of type ICollection<Enum>. 

Say for example we have the following enumeration:
public enum CustomerType
{
    VIP,
    FrequentCustomer,
    BadCustomer
}
We also have the following class:
public class Customer
{
    public int Id { get;set; } 
    public string FirstName { get;set; } 
    public string LastName { get;set; } 
    public ICollection<CustomerType> CustomerAtrributes { get;set; }
}
How can I store the property CustomerAtrributes in the database to be easily retrieved later?

For example I'm looking for something like the following:
CustomerId | FirstName | LastName | CustomerType    |  
1          | Bob       | Smith    | VIP             |  
1          | Bob       | Smith    | FrequentCustomer|  
2          | Mike      | Jordan   | BadCustomer     |  
EDIT: I'm using EntityFramework 6 to store my objects in the database using the CodeFirst approach.

EDIT: A friend found a possible duplicate : ef 5 codefirst enum collection not generated in database .But please, if you have any different ideas or workarounds, post them. 
解决方案
An enum is still a primitive type, in particular an integer. Just as your Costumer class can't have an ICollection<int> that maps to something in the database, it can't have a collection of the enum.

You have to create a CostumerType class and rename the enum:
public enum TypesOfCostumer //example name
{
    VIP,
    FrequentCustomer,
    BadCustomer
}

public class CostumerType
{
    public int Id { get; set; }
    public TypesOfCostumer Type {get; set;}
}


                        
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