# C1.WPF.DataFilter.TextFilter.DefaultFilterOperation

## Content

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<h1 id="C1_WPF_DataFilter_TextFilter_DefaultFilterOperation_" data-uid="C1.WPF.DataFilter.TextFilter.DefaultFilterOperation*">DefaultFilterOperation Property
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<a id="C1_WPF_DataFilter_TextFilter_DefaultFilterOperation_" data-uid="C1.WPF.DataFilter.TextFilter.DefaultFilterOperation*"></a>
<h4 id="C1_WPF_DataFilter_TextFilter_DefaultFilterOperation" data-uid="C1.WPF.DataFilter.TextFilter.DefaultFilterOperation">DefaultFilterOperation</h4>
<div class="markdown level1 summary"><p>Gets or sets the value of <span class="xref">C1.DataCollection.FilterOperation</span>, which is used as the default value for a newly added expression. The default value is <span class="xref">C1.DataCollection.FilterOperation.Contains</span>.</p>
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<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">public override FilterOperation DefaultFilterOperation { get; set; }</code></pre>
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  <pre><code class="lang-vbnet hljs">Public Overrides Property DefaultFilterOperation As FilterOperation</code></pre>
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<h5 class="overrides">Overrides</h5>
<div><a class="xref" href="C1.WPF.DataFilter.ConditionalFilter.DefaultFilterOperation.html#C1_WPF_DataFilter_ConditionalFilter_DefaultFilterOperation">ConditionalFilter.DefaultFilterOperation</a></div>
<h5 class="exceptions">Exceptions</h5>
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      <th>Type</th>
      <th>Condition</th>
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      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.invalidoperationexception">InvalidOperationException</a></td>
      <td><p>The specified <span class="xref">C1.DataCollection.FilterOperation</span> is not supported by the filter.</p>
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