AttributeTargetElements = MulticastTargets.Method不被尊重吗? [英] AttributeTargetElements = MulticastTargets.Method isn't respected?

问题描述

我应用了这一方面:

[Serializable]
[MulticastAttributeUsage(MulticastTargets.Method)] // regular methods, excluding ctors!
public class WmiClassMethodAspect : OnMethodBoundaryAspect
{
    public WmiClassMethodAspect() { ApplyToStateMachine = false; } // PostSharp Express edition...

    public override void OnEntry(MethodExecutionArgs args)
    {
        //base.OnEntry(args);
    }

    public override void OnExit(MethodExecutionArgs args)
    {
        //base.OnExit(args);
    }
}

在某些namespace类别上:

[assembly: WmiClassMethodAspect(AttributeTargetTypes = "OperatingSystemsWmi.*", 
    AttributePriority = 10, ApplyToStateMachine = false, 
    AttributeTargetElements = MulticastTargets.Method)]

但是如果不遵守AttributeTargetElements设置:它也会为属性输入WmiClassMethodAspect.OnEntry和WmiClassMethodAspect.OnExit(例如，set_MyProperty和get_MyProperty)

But if it doesn't respect the AttributeTargetElements setting: it enters WmiClassMethodAspect.OnEntry and WmiClassMethodAspect.OnExit for properties too (set_MyProperty and get_MyProperty, for instance)

推荐答案

之所以会发生这种情况，是因为 MulticastTargets.Method 将属性访问器视为方法(它们是方法).请注意， MulticastTarget.Property 用于指定属性(方法组)，例如用于 LocationLevelAspect .

This happens because MulticastTargets.Method treats property accessors as methods (which they are). Note that MulticastTarget.Property specifies property (method group) for purposes of e.g. LocationLevelAspect.

要产生预期的行为，您需要基于属性的获取器和设置器的名称添加一个排除项:

To produce the intended behavior, you would need to add an exclusion for property getters and setters based their name:

[assembly: WmiClassMethodAspect(AttributeTargetTypes = "OperatingSystemsWmi.*", 
           AttributePriority = 10, AttributeTargetElements = MulticastTargets.Method, 
           AttributeTargetMembers = "get_*", AttributeExclude = true)]

[assembly: WmiClassMethodAspect(AttributeTargetTypes = "OperatingSystemsWmi.*", 
           AttributePriority = 10, ApplyToStateMachine = false, AttributeTargetElements = MulticastTargets.Method, 
           AttributeTargetMembers = "set_*", AttributeExclude = true)]

如果要在一个属性中使用此属性，则可以使用正则表达式:

If you want this in one attribute, you can use regular expressions:

[assembly: WmiClassMethodAspect(AttributeTargetTypes = "OperatingSystemsWmi.*", 
           AttributePriority = 10, ApplyToStateMachine = false, 
           AttributeTargetElements = MulticastTargets.Method,
           AttributeTargetMembers = "regex:^(?!get_|set_).+")]

这可能是最简洁的解决方案.

This is probably the most succinct solution.

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