我可以添加MVC 2 DataAnnotation属性，以现有的属性？ [英] Can I add MVC 2 DataAnnotation attributes to existing properties?

问题描述

我使用的是生成的类作为一个模型，我想补充DataAnnotation属性它的一些属性。因为它是一个生成的code，我不想直接添加注释。有另一种方式将其连接到一个属性？

I'm using a generated class as a model, and I wish to add DataAnnotation attributes to some of its properties. As it's a generated code, I don't want to add the annotations directly. Is there another way to attach them to a property?

我会考虑做模型的接口，并使用部分类来获取生成的类来订阅它。有一个不太复杂的解决方案，假设即使将工作？

I'd considered making the model an interface, and using a partial class to get the generated class to subscribe to it. Is there a less elaborate solution, assuming that would even work?

推荐答案

是的，有。你必须创建元数据类，将有相同的属性，你的原始模型，并将其与MetadataType属性连接到你的模型：

Yes there is. You have to create metadata class that will have the same properties that your original model, and connect it to your model with MetadataType attribute:

[MetadataType(typeof(MyModelMetadata))]
public partial class OriginalMyModel
{
}

public class MyModelMetadata
{
    [Required]
    public string MyProperty;  

    // ...
}

在这个例子ebove OriginalModel是您正确的模型类，MyModelMetadata只对注释的属性使用的类。 MyModelMetadata应该有你的模型具有相同的属性。

In the example ebove OriginalModel is your proper model class, and MyModelMetadata is a class used only for annotating properties. MyModelMetadata should have the same properties that your model has.

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