title: Retrieve Value on Mouse Click for WPF Column Series
body: <p>I have a simple chart with two column series containing all months in the year.  I want to filter a list view that show detailed information for the selected month.  I can capture the event via <code>MouseDown</code> on the <code>ColumnSeries</code> but I'm not sure how to get to the month in the column series.</p>
  
  <pre><code>&lt;DVC:ColumnSeries Title=" Expenditures" IndependentValueBinding="{Binding Path=Month}"
                    DependentValueBinding="{Binding Path=Amt}"
                    ItemsSource="{Binding Path=ActivityExpenditureSeries}"
                    MouseDown="ColumnSeries_MouseDown" /&gt;
  </code></pre>
  
  <p>I'm sure I could do some fancy WPF databinding to the selected <code>ColumnSeries</code> for the listviews <code>ItemsSource</code> but this is where I'm heading:</p>
  
  <pre><code>Private Sub ColumnSeries_MouseDown(ByVal sender As System.Object,
                                     ByVal e As System.Windows.Input.MouseButtonEventArgs)
      ' This is the functionality I'm looking for...
      Dim selectedColumn As String
      FilterListView(selectedColumn)
  End Sub
  </code></pre>