title: Hide zero values with StringFormat
body: <p>I made a similar question <a href="https://stackoverflow.com/questions/17594523/stringformat-with-value-zero">months ago</a></p>
  
  <p>In this case I have a textblock like this</p>
  
  <pre><code>&lt;TextBlock FontSize="28" Text="{Binding DataPoint.Y, StringFormat=\{0:0\\%\}}" Foreground="Black"&gt;
  </code></pre>
  
  <p>As you can see, my StringFormat puts a '%' sign after the number, if my data is 0.0 (I fill the component in code behind, my variable is a double) I get "0%"</p>
  
  <p>But now I want to get "" if my text is 0.0</p>
  
  <p>So far I have this:</p>
  
  <pre><code> Text="{Binding DataPoint.Y, StringFormat=\{0:#.#\\%\}}"
  </code></pre>
  
  <p>But this retrieves "%", how can I get ""?</p>