C＃重写的属性在子类中 [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？我想要做的属性的话，被其他子类继承，只是没有这一个。

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.

编辑：哎呦，看起来像我忘了编译或东西，因为如上面贴code呢，其实，工作

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

推荐答案

这为我工作。

测试code：

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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