添加属性创建后匿名类型 [英] Add property to anonymous type after creation

问题描述

我使用匿名对象来传递我的HTML属性的一些辅助方法。
如果消费者没有添加ID属性，我想将其添加到我的helper方法。

I use an anonymous object to pass my Html Attributes to some helper methods. If the consumer didn't add an ID attribute, I want to add it in my helper method.

我如何将属性添加到该匿名对象？

How can I add an attribute to this anonymous object?

推荐答案

下面的扩展类会得到你所需要的。

The following extension class would get you what you need.

public static class ObjectExtensions
{
    public static IDictionary<string, object> AddProperty(this object obj, string name, object value)
    {
        var dictionary = obj.ToDictionary();
        dictionary.Add(name, value);
        return dictionary;
    }

    // helper
    public static IDictionary<string, object> ToDictionary(this object obj)
    {
        IDictionary<string, object> result = new Dictionary<string, object>();
        PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(obj);
        foreach (PropertyDescriptor property in properties){
            result.Add(property.Name, property.GetValue(obj));
        }
        return result;
    }
}

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