EntityType 'UserInfo' has no key defined. Define the key for this EntityType.
One or more validation errors were detected during model generation:
System.Data.Edm.EdmEntityType: : EntityType 'UserInfo' has no key defined. Define the key for this EntityType. System.Data.Edm.EdmEntitySet: EntityType: EntitySet �UserInfo� is based on type �UserInfo� that has no keys defined.
遇见这个问题,我觉得很奇特,因为事实上我已经为'UserInfo'这个类定义了[KEY]的类注释。
然后又提示我找不到Key。见下面的代码
1 public class UserInfo 2 { 3 [Key] 4 public int UserID; 5 public string UserName; 6 public string Password; 7 public int UseState; 8 public string Email; 9 public DateTime AddTime; 10 public int AddUser_ID; 11 public string ImgUrl; 12 public virtual UserType UserTypes { get; set; } 13 }
后面在stackoverflow上找到了答案。EF会自动识别一个实体的主键只要主键的名称符号 'Id'或 '实体名Id'. 另外,它必须声明成属性,访问权限必须是Public的。这个错误是因为我将UserId声明成了一个字段,只要修改成属性就OK了。修改后的代码如下所示。
1 public class UserInfo 2 { 3 [Key] 4 public int UserID { get; set; } 5 public string UserName { get; set; } 6 public string Password { get; set; } 7 public int UseState { get; set; } 8 public string Email { get; set; } 9 public DateTime AddTime { get; set; } 10 public int AddUser_ID { get; set; } 11 public string ImgUrl{ get; set; } 12 public virtual UserType UserTypes { get; set; } 13 }
2013-01-10 16:50:05
作者:kissazi2
出处:http://www.cnblogs.com/kissazi2/
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