# GrapeCity.ActiveReports.Viewer.Wpf.View.DropDownButton.OnIsOpenChanged

## Content

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<h1 id="GrapeCity_ActiveReports_Viewer_Wpf_View_DropDownButton_OnIsOpenChanged_" data-uid="GrapeCity.ActiveReports.Viewer.Wpf.View.DropDownButton.OnIsOpenChanged*">OnIsOpenChanged Method
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<div class="markdown level0 summary"></div>
<div class="markdown level0 conceptual"></div>



<a id="GrapeCity_ActiveReports_Viewer_Wpf_View_DropDownButton_OnIsOpenChanged_" data-uid="GrapeCity.ActiveReports.Viewer.Wpf.View.DropDownButton.OnIsOpenChanged*"></a>
<h4 id="GrapeCity_ActiveReports_Viewer_Wpf_View_DropDownButton_OnIsOpenChanged_System_Boolean_System_Boolean_" data-uid="GrapeCity.ActiveReports.Viewer.Wpf.View.DropDownButton.OnIsOpenChanged(System.Boolean,System.Boolean)">OnIsOpenChanged(bool, bool)</h4>
<div class="markdown level1 summary"><p>Raises the opened event or closed event for the DropDownButton.</p>
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<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">protected virtual void OnIsOpenChanged(bool oldValue, bool newValue)</code></pre>
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<h5 class="parameters">Parameters</h5>
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  <thead>
    <tr>
      <th>Type</th>
      <th>Name</th>
      <th>Description</th>
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  <tbody>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.boolean">bool</a></td>
      <td><span class="parametername">oldValue</span></td>
      <td></td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.boolean">bool</a></td>
      <td><span class="parametername">newValue</span></td>
      <td></td>
    </tr>
  </tbody>
</table>
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