# C1.Xamarin.Forms.Input.C1DropDown.DropDownOpenChanging

## Content

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<h1 id="C1_Xamarin_Forms_Input_C1DropDown_DropDownOpenChanging" data-uid="C1.Xamarin.Forms.Input.C1DropDown.DropDownOpenChanging" class="text-break">DropDownOpenChanging Event
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<div class="markdown level0 summary"><p>Event raised before the IsDropDownOpenChanging property changes.</p>
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<div class="markdown level0 conceptual"></div>
<h6><strong>Namespace</strong>: <a class="xref" href="C1.Xamarin.Forms.Input.html">C1.Xamarin.Forms.Input</a></h6>
<h6><strong>Assembly</strong>: C1.Xamarin.Forms.Input.dll</h6>
<h5 id="C1_Xamarin_Forms_Input_C1DropDown_DropDownOpenChanging_syntax">Syntax</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">public event EventHandler&lt;DropDownOpenChangingEventArgs&gt; DropDownOpenChanging</code></pre>
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<h5 class="returns">Returns</h5>
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      <th>Type</th>
      <th>Description</th>
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      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.eventhandler-1">EventHandler</a>&lt;<a class="xref" href="C1.Xamarin.Forms.Input.DropDownOpenChangingEventArgs.html">DropDownOpenChangingEventArgs</a>&gt;</td>
      <td>Event raised before the IsDropDownOpenChanging property changes.</td>
    </tr>
  </tbody>
</table>
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