C# 覆盖子类中的属性 [英] C# Override an attribute in a subclass

问题描述

public class MyWebControl {

    [ExternallyVisible]
    public string StyleString {get;set;}

}

public class SmarterWebControl : MyWebControl {

    [ExternallyVisible]
    public string CssName{get;set;}

    new public string StyleString {get;set;} //Doesn't work

}

是否可以删除子类中的属性?我确实希望该属性被其他子类继承，而不是这个.

Is it possible to remove the attribute in the subclass? I do want the attribute to get inherited by other subclasses, just not this one.

哎呀，好像我忘了编译什么的，因为上面发布的代码确实有效！

Whoops, looks like I forgot to compile or something because the code as posted above does, in fact, work!

推荐答案

它对我有用.

测试代码:

public static void Main()
{
    var attribute = GetAttribute(typeof (MyWebControl), "StyleString", false);
    Debug.Assert(attribute != null);

    attribute = GetAttribute(typeof(SmarterWebControl), "StyleString", false);
    Debug.Assert(attribute == null);

    attribute = GetAttribute(typeof(SmarterWebControl), "StyleString", true);
    Debug.Assert(attribute == null);
}

private static ExternallyVisibleAttribute GetAttribute(Type type, string propertyName, bool inherit)
{
    PropertyInfo property = type.GetProperties().Where(p=>p.Name.Equals(propertyName, StringComparison.OrdinalIgnoreCase)).FirstOrDefault();

    var list = property.GetCustomAttributes(typeof(ExternallyVisibleAttribute), inherit).Select(o => (ExternallyVisibleAttribute)o);

    return list.FirstOrDefault();
}

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