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ReturnOnException Aspect (postsharp)

2011-07-05 - c#, postsharp, aop

This comes in handy sometimes.

public static class ExceptionHandler
{

 [Serializable]  
 public class ReturnOnException : OnExceptionAspect  
 {  
   public ReturnOnException(object objectToReturn)  
   {  
     _objectToReturn = objectToReturn;  
   }  

   object _objectToReturn;  

   public override void OnException(MethodExecutionEventArgs eventArgs)  
   {  
     string message = eventArgs.Exception.Message;  
     eventArgs.FlowBehavior = FlowBehavior.Return;  
     eventArgs.ReturnValue = _objectToReturn;  
   }  
 }

}

Usage:

//returns -1 on any error

[ExceptionHandler.ReturnOnException(-1)]

public int DivideBy(int number, int dividedby)  
{  
  return number / dividedby;  
}