# C1.Win.FlexGrid.C1FlexGridBase.BeforeSelChange

## Content

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




<h1 id="C1_Win_FlexGrid_C1FlexGridBase_BeforeSelChange" data-uid="C1.Win.FlexGrid.C1FlexGridBase.BeforeSelChange" class="text-break">BeforeSelChange Event
</h1>
<div class="markdown level0 summary"><p>Fires before the selection changes (<a class="xref" href="C1.Win.FlexGrid.C1FlexGridBase.Row.html#C1_Win_FlexGrid_C1FlexGridBase_Row">Row</a>, <a class="xref" href="C1.Win.FlexGrid.C1FlexGridBase.Col.html#C1_Win_FlexGrid_C1FlexGridBase_Col">Col</a>, <a class="xref" href="C1.Win.FlexGrid.C1FlexGridBase.RowSel.html#C1_Win_FlexGrid_C1FlexGridBase_RowSel">RowSel</a>, <a class="xref" href="C1.Win.FlexGrid.C1FlexGridBase.ColSel.html#C1_Win_FlexGrid_C1FlexGridBase_ColSel">ColSel</a> properties).</p>
</div>
<div class="markdown level0 conceptual"></div>
<h6><strong>Namespace</strong>: <a class="xref" href="C1.Win.FlexGrid.html">C1.Win.FlexGrid</a></h6>
<h6><strong>Assembly</strong>: C1.Win.FlexGrid.10.dll</h6>
<h5 id="C1_Win_FlexGrid_C1FlexGridBase_BeforeSelChange_syntax">Syntax</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">public event RangeEventHandler BeforeSelChange</code></pre>
</div>
<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Public Event BeforeSelChange As RangeEventHandler</code></pre>
</div>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-condensed">
  <thead>
    <tr>
      <th>Type</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><a class="xref" href="C1.Win.FlexGrid.RangeEventHandler.html">RangeEventHandler</a></td>
      <td>Fires before the selection changes (, , ,  properties).</td>
    </tr>
  </tbody>
</table>
<h5 id="C1_Win_FlexGrid_C1FlexGridBase_BeforeSelChange_remarks"><strong>Remarks</strong></h5>
<div class="markdown level0 remarks"><p>This event fires before the <a class="xref" href="C1.Win.FlexGrid.C1FlexGridBase.RowSel.html#C1_Win_FlexGrid_C1FlexGridBase_RowSel">RowSel</a> and <a class="xref" href="C1.Win.FlexGrid.C1FlexGridBase.ColSel.html#C1_Win_FlexGrid_C1FlexGridBase_ColSel">ColSel</a> properties change, either as a result 
of user actions or through code. It allows you to prevent the selection of certain cells, thus creating 
"protected" ranges on a grid.</p>
<p>To prevent the selection of a range, you also need to handle the <a class="xref" href="C1.Win.FlexGrid.C1FlexGridBase.BeforeRowColChange.html">BeforeRowColChange</a> event, which 
is fired before the Row and Col properties change.</p>
</div>
</div>