ASP.NET MVC3 System.ComponentModel.DataAnnotations和Association

Question

这部分代码工作正常

[Association(Storage = "profile", ThisKey = "UserId", OtherKey = "UserId")]
public Profile User {
   get { return this.profile.Entity; }
   set { this.profile.Entity = value; }
}

但如果我在这个课程中添加

System.ComponentModel.DataAnnotations 

然后，找不到协会。

问题出在哪里？

Answer 1

看起来你有两个冲突的命名空间。尝试将Association更改为System.Data.Linq.Mapping.Association，因此它看起来像：

[System.Data.Linq.Mapping.Association(Storage = "profile", ThisKey = "UserId", OtherKey = "UserId")]
public Profile User {
   get { return this.profile.Entity; }
   set { this.profile.Entity = value; }
}

Answer 2

对奥斯汀答案的改进是使用using声明：

using L2SAssociation = System.Data.Linq.Mapping.Association;

[L2SAssociation(Storage = "profile", ThisKey = "UserId", OtherKey = "UserId")]
public Profile User
{
   get { return this.profile.Entity; }
   set { this.profile.Entity = value; }
}