title: Call Method on event in xaml in Xamarin Forms
body: <p>In WPF I call my Load method like so(using my MainViewModel in the DataContext):</p>
  
  <pre><code>&lt;i:Interaction.Triggers&gt;
      &lt;i:EventTrigger EventName="Loaded" &gt;
          &lt;i:InvokeCommandAction Command="{Binding LoadCommand}"/&gt;
      &lt;/i:EventTrigger&gt;
  &lt;/i:Interaction.Triggers&gt;
  </code></pre>
  
  <p>How can I do something similar in Xamarin Forms? Maybe on the Appearing event? Something like this, except I'm not sure where to go from here.</p>
  
  <pre><code>  &lt;ContentPage.Triggers&gt;
      &lt;EventTrigger Event="Appearing"&gt;
  
      &lt;/EventTrigger&gt;
    &lt;/ContentPage.Triggers&gt; 
  </code></pre>