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PostSharp How to know at runtime if a certain aspect was applied to a method?


PostSharp How to know at runtime if a certain aspect was applied to a method?

By : user2949559
Date : November 17 2020, 01:00 AM
seems to work fine When you're adding a method-level aspect (e.g. OnExceptionAspect) as an attribute on the class or the assembly level, PostSharp multicasts this attribute to all the applicable methods in that class/assembly. At the next stage the aspect transforms each method with the attribute and the attribute itself is removed.
You can tell PostSharp to keep all the aspect attributes by setting the MulticastAttributeUsageAttribute.PersistMetaData property to true. The [MulticastAttributeUsage] attribute must be applied to your aspect class.
code :
[MulticastAttributeUsage( PersistMetaData = true )]
public class MyAspect : OnExceptionAspect
{
    // ...
}


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Postsharp: Method signature for Aspect

Postsharp: Method signature for Aspect


By : user1664721
Date : March 29 2020, 07:55 AM
seems to work fine Yes, by overriding the method CompileTimeValidate and returning false if the MethodBase has not the expected signature.
How to exit a method in the OnEntry method of a PostSharp aspect based on condition

How to exit a method in the OnEntry method of a PostSharp aspect based on condition


By : Charles Seiler
Date : March 29 2020, 07:55 AM
I hope this helps . Ok I figured it out myself. Here the solution for the benefit of everyone:
code :
    [AttributeUsage(AttributeTargets.Method)] 
    public class IgnoreIfInactiveAttribute : OnMethodBoundaryAspect 
    { 
        public override void OnEntry(MethodExecutionEventArgs eventArgs) 
        { 
             if (condition) 
            { 
                eventArgs.FlowBehavior = FlowBehavior.Return;
            } 
        } 
    } 
Reflection to find all methods with a PostSharp aspect applied

Reflection to find all methods with a PostSharp aspect applied


By : Markita Henderson
Date : March 29 2020, 07:55 AM
around this issue Multicast attributes are by default removed during the multicasting phase and all instances (there can be quite many if you i.e. multicast to all methods) are passed internally to the Aspect Framework.
You can tell the multicast engine not to remove metadata so that you can access the attribute at runtime. This is done like this:
code :
[MulticastAttributeUsage(PersistMetaData = true)]
How to call injected method from another aspect in PostSharp

How to call injected method from another aspect in PostSharp


By : Makarov
Date : March 29 2020, 07:55 AM
around this issue An aspect can access the methods introduced by another aspect using the [ImportMember] attribute. For this to work correctly the importing aspect must also be an instance scoped aspect and you would want to specify the correct order of execution for all the involved aspects.
So, your modified example may look like this:
Postsharp: Access already applied aspects from an Aspect

Postsharp: Access already applied aspects from an Aspect


By : Sitobion
Date : March 29 2020, 07:55 AM
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