# C1.WPF.FlexGrid.GridPanel.Invalidate

## Content

<div class="doc-site-dotnet-api-container">



<h1 id="C1_WPF_FlexGrid_GridPanel_Invalidate_" data-uid="C1.WPF.FlexGrid.GridPanel.Invalidate*">Invalidate Method
</h1>
<div class="markdown level0 summary"></div>
<div class="markdown level0 conceptual"></div>



<a id="C1_WPF_FlexGrid_GridPanel_Invalidate_" data-uid="C1.WPF.FlexGrid.GridPanel.Invalidate*"></a>
<h4 id="C1_WPF_FlexGrid_GridPanel_Invalidate" data-uid="C1.WPF.FlexGrid.GridPanel.Invalidate">Invalidate()</h4>
<div class="markdown level1 summary"><p>Forces the grid panel to re-create all visible elements.</p>
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<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">public void Invalidate()</code></pre>
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<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Public Sub Invalidate()</code></pre>
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<a id="C1_WPF_FlexGrid_GridPanel_Invalidate_" data-uid="C1.WPF.FlexGrid.GridPanel.Invalidate*"></a>
<h4 id="C1_WPF_FlexGrid_GridPanel_Invalidate_C1_WPF_FlexGrid_CellRange_" data-uid="C1.WPF.FlexGrid.GridPanel.Invalidate(C1.WPF.FlexGrid.CellRange)">Invalidate(CellRange)</h4>
<div class="markdown level1 summary"><p>Forces the grid panel to re-create the elements in a given <a class="xref" href="C1.WPF.FlexGrid.CellRange.html">CellRange</a>.</p>
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<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">public void Invalidate(CellRange rng)</code></pre>
</div>
<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Public Sub Invalidate(rng As CellRange)</code></pre>
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<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-condensed">
  <thead>
    <tr>
      <th>Type</th>
      <th>Name</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><a class="xref" href="C1.WPF.FlexGrid.CellRange.html">CellRange</a></td>
      <td><span class="parametername">rng</span></td>
      <td></td>
    </tr>
  </tbody>
</table>
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