title: How to get field that datagrid column is bound to?
body: <p>In my xaml I have modified each column header to include a button. For the command parameter I would like to use the column's data field name, instead of the header content. E.g. Instead of "Job Title" which is what the header content is, I want "JOB_TITLE".</p>
  
  <p>For header content I would use:</p>
  
  <pre><code>&lt;Button Command="{Binding DataContext.OpenFilterCommand, RelativeSource={RelativeSource AncestorType=UserControl}}" CommandParameter="{TemplateBinding Content}"&gt;
  </code></pre>
  
  <p>How do I get the actual field name?</p>