EntityType没有定义键.提出[关键] [英] EntityType has no key defined. [Key] is presented

问题描述

实体

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

型号

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区域"没有键 定义.定义此EntityType的键.
System.Data.Edm.EdmEntitySet:EntityType:EntitySet``区域''基于 没有定义键的``Region''类型.

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.

推荐答案

您的类字段需要更改为EF的属性才能正确使用该类；

Your class fields need to be changed to properties for EF to use the class correctly;

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

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