# C1.DataFilter.Expression

## Content

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  <h1 id="C1_DataFilter_Expression" data-uid="C1.DataFilter.Expression" class="text-break">Expression Class
</h1>
  <div class="markdown level0 summary"><p>Base class for filter expression condition.</p>
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  <div class="markdown level0 conceptual"></div>
  <div class="inheritance">
    <h5>Inheritance</h5>
    <div class="level0"><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object">object</a></div>
    <div class="level1"><span class="xref">Expression</span></div>
      <div class="level2"><a class="xref" href="C1.DataFilter.CombinationExpression.html">CombinationExpression</a></div>
      <div class="level2"><a class="xref" href="C1.DataFilter.OperationExpression.html">OperationExpression</a></div>
      <div class="level2"><a class="xref" href="C1.DataFilter.PredicateExpression.html">PredicateExpression</a></div>
  </div>
  <h6><strong>Namespace</strong>: <a class="xref" href="C1.DataFilter.html">C1.DataFilter</a></h6>
  <h6><strong>Assembly</strong>: C1.WPF.DataFilter.4.6.2.dll</h6>
  <h5 id="C1_DataFilter_Expression_syntax">Syntax</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public abstract class Expression</code></pre>
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  <div class="codewrapper">
    <pre><code class="lang-vbnet hljs">Public MustInherit Class Expression</code></pre>
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  <h3 id="constructors">Constructors
</h3>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td id="C1_DataFilter_Expression__ctor" data-uid="C1.DataFilter.Expression.#ctor">
          <a class="xref" href="C1.DataFilter.Expression.-ctor.html#C1_DataFilter_Expression__ctor">Expression()</a>
        </td>
        <td class="markdown level1 summary"></td>
      </tr>
    </tbody>
  </table>
  <h3 id="properties">Properties
</h3>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td id="C1_DataFilter_Expression_Not" data-uid="C1.DataFilter.Expression.Not">
          <a class="xref" href="C1.DataFilter.Expression.Not.html#C1_DataFilter_Expression_Not">Not</a>
        </td>
        <td class="markdown level1 summary"><p>Gets or sets a value indicating the negation of the expression.</p>
</td>
      </tr>
    </tbody>
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  <h3 id="methods">Methods
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  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td id="C1_DataFilter_Expression_GetFilterExpression" data-uid="C1.DataFilter.Expression.GetFilterExpression">
          <a class="xref" href="C1.DataFilter.Expression.GetFilterExpression.html#C1_DataFilter_Expression_GetFilterExpression">GetFilterExpression()</a>
        </td>
        <td class="markdown level1 summary"><p>Converts current the <a class="xref" href="C1.DataFilter.Expression.html">Expression</a> to the <span class="xref">C1.DataCollection.FilterExpression</span>.</p>
</td>
      </tr>
    </tbody>
  </table>

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