asp.net-mvc - EntityType 没有定义键。 [Key] 出示

Question

实体

public class Region
{
    [Key]
    public int ID;
    public string Name; 
    public string Description;
}

模型

public class RegionModel
{   [Key]
    public int ID { get; set; }

    public string Name { get; set; }

    public string Description { get; set; }
}

错误

System.Data.Edm.EdmEntityType: : EntityType 'Region' has no key defined. Define the key for this EntityType.
System.Data.Edm.EdmEntitySet: EntityType: EntitySet �Regions� is based on type �Region� that has no keys defined.

Answer 1

您的类字段需要更改为属性，以便 EF 正确使用该类；

public class Region
{
    [Key]
    public int ID { get; set; }
    public string Name { get; set; }
    public string Description { get; set; }
}