xamlでボタンのクリックイベントを実装する場合のいくつかのパターン。

clickButton.xaml

<!-- without Interaction Trigger -->
<Button Content="Hoge"
  Command="{Binding DoCommand}"
  CommandParameter="hoge" 
/>

<!-- Interaction Trigger with InvkeoCommandAction -->
<Button Content="Hoge" >
  <i:Interaction.Triggers>
    <i:EventTrigger EventName="Click">
      <i:InvokeCommandAction Command="{Binding DoCommand}" CommandParameter="hoge" />
    </i:EventTrigger>
  </i:Interaction.Triggers>
</Button>

<!-- Interaction Trigger with LivetCallMethodAction  -->
<Button Content="Hoge" >
  <i:Interaction.Triggers>
    <i:EventTrigger EventName="Click">
      <l:LivetCallMethodAction MethodTarget="{Binding}" MethodName="Do" MethodParameter="hoge"/>
    </i:EventTrigger>
  </i:Interaction.Triggers>
</Button>