title: Xamarin Forms devexpress grid - access cell
body: <p>I'm using Xamarin Forms with devexpress grid, which contains multiple rows.
  I'd like to be able to get the value of a selected row / cell. How can I achieve this?</p>
  
  <pre><code>&lt;ScrollView&gt;
      &lt;dxGrid:GridControl 
          x:Name="grid" 
          ItemsSource="{Binding materials}"
          AutoFilterPanelVisibility="true"
          IsReadOnly="true"
          SortMode="Multiple"&gt;
              &lt;dxGrid:GridControl.Columns&gt;
                  &lt;dxGrid:TextColumn 
                      FieldName="id" 
                      Caption = "ID" 
                      AutoFilterCondition="Contains"/&gt;
                  &lt;dxGrid:TextColumn 
                      FieldName="description" 
                      Caption = "Material" 
                      AutoFilterCondition="Contains"/&gt;
              &lt;/dxGrid:GridControl.Columns&gt;
      &lt;/dxGrid:GridControl&gt;
  &lt;/ScrollView&gt;
  </code></pre>
  
  <p>materials is a simple List, where Material is a simple example class, containing two string properties (id, description).</p>