# C1.WPF.RulesManager.RulesEngineExpressionRule.GetApplicableFields

## Content

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<h1 id="C1_WPF_RulesManager_RulesEngineExpressionRule_GetApplicableFields_" data-uid="C1.WPF.RulesManager.RulesEngineExpressionRule.GetApplicableFields*">GetApplicableFields Method
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<div class="markdown level0 summary"></div>
<div class="markdown level0 conceptual"></div>



<a id="C1_WPF_RulesManager_RulesEngineExpressionRule_GetApplicableFields_" data-uid="C1.WPF.RulesManager.RulesEngineExpressionRule.GetApplicableFields*"></a>
<h4 id="C1_WPF_RulesManager_RulesEngineExpressionRule_GetApplicableFields_C1_WPF_RulesManager_RulesEngineSource_" data-uid="C1.WPF.RulesManager.RulesEngineExpressionRule.GetApplicableFields(C1.WPF.RulesManager.RulesEngineSource)">GetApplicableFields(RulesEngineSource)</h4>
<div class="markdown level1 summary"><p>Gets the fields from the source where this rule is applicable</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">public override IEnumerable&lt;(string Name, Type Type)&gt; GetApplicableFields(RulesEngineSource source)</code></pre>
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  <pre><code class="lang-vbnet hljs">Public Overrides Function GetApplicableFields(source As RulesEngineSource) As IEnumerable(Of (Name As String, Type As Type))</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.RulesManager.RulesEngineSource.html">RulesEngineSource</a></td>
      <td><span class="parametername">source</span></td>
      <td><p>The source to query the fields.</p>
</td>
    </tr>
  </tbody>
</table>
<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="https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1">IEnumerable</a>&lt;(<a class="xref" href="https://learn.microsoft.com/dotnet/api/system.string">string</a> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.valuetuple-system.string,system.type-.name">Name</a>, <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.type">Type</a> <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.valuetuple-system.string,system.type-.type">Type</a>)&gt;</td>
      <td></td>
    </tr>
  </tbody>
</table>
<h5 class="overrides">Overrides</h5>
<div><a class="xref" href="C1.WPF.RulesManager.RulesEngineRule.GetApplicableFields.html#C1_WPF_RulesManager_RulesEngineRule_GetApplicableFields_C1_WPF_RulesManager_RulesEngineSource_">RulesEngineRule.GetApplicableFields(RulesEngineSource)</a></div>
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