Silverlight：在EventTrigger中访问事件有效内容

Question

有没有办法访问EventTrigger绑定的事件的EventArgs？我创建了一个通用的EventArgs类，让我将通用有效负载传递给事件处理程序。如何在EventTrigger中访问它？是否有任何扩展可以让我这样做？

   <i:EventTrigger EventName="AgentSelected" SourceObject="{Binding ElementName=ctlAgentSearch, Path=DataContext}">
                <ei:CallMethodAction TargetObject="{Binding ElementName=bidAgentEditView}"  MethodName="ToggleSearchPanel"/>
                <ei:ChangePropertyAction TargetObject="{Binding ElementName=text}" PropertyName=Text" 
Value=??? **Here I need to access EventArgs of the event that was raised?** />
            </i:EventTrigger>