将DataAnnontations添加到生成的局部类 [英] Adding DataAnnontations to Generated Partial Classes

问题描述

我有一个Subsonic3 Active Record生成的部分User类，该类已经用单独的部分类中的某些方法进行了扩展。

I have a Subsonic3 Active Record generated partial User class which I've extended on with some methods in a separate partial class.

我想知道它是否可以将数据注释添加到在另一个Subsonic上声明的一个子类的成员属性中。我尝试了此生成。

I would like to know if it is possible to add Data Annotations to the member properties on one partial class where it's declared on the other Subsonic Generated one I tried this.

public partial class User
{
    [DataType(DataType.EmailAddress, ErrorMessage = "Please enter an email address")]
    public string Email { get; set; }

    ...
}

该示例给出了成员已定义错误。

That examples gives the "Member is already defined" error.

我想我之前可能已经看过一个示例，该示例说明我要如何处理Dynamic Data和Linq2Sql。

I think I might have seen an example a while ago of what I'm trying to do with Dynamic Data and Linq2Sql.

推荐答案

您需要做的是创建一个'伙伴类'并将数据注释应用于该类：

What you will need to do is create a 'buddy class' and apply the Data Annotations to that class:

[MetadataType(typeof(UserValidation))]
public partial class User 
{
  ...
}

public class UserValidation
{
  [DataType(DataType.EmailAddress, ErrorMessage = "Please enter an email address")]
  public string Email { get; set; }
}

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