# GrapeCity.ActiveReports.Core.Rendering.Expressions.EvalServiceExtension.Evaluate

## Content

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



<h1 id="GrapeCity_ActiveReports_Core_Rendering_Expressions_EvalServiceExtension_Evaluate_" data-uid="GrapeCity.ActiveReports.Core.Rendering.Expressions.EvalServiceExtension.Evaluate*">Evaluate Method
</h1>
<div class="markdown level0 summary"></div>
<div class="markdown level0 conceptual"></div>



<a id="GrapeCity_ActiveReports_Core_Rendering_Expressions_EvalServiceExtension_Evaluate_" data-uid="GrapeCity.ActiveReports.Core.Rendering.Expressions.EvalServiceExtension.Evaluate*"></a>
<h4 id="GrapeCity_ActiveReports_Core_Rendering_Expressions_EvalServiceExtension_Evaluate__1_GrapeCity_ActiveReports_Core_Rendering_IExpressionEvaluatorService_GrapeCity_Enterprise_Data_Expressions_ExpressionInfo_" data-uid="GrapeCity.ActiveReports.Core.Rendering.Expressions.EvalServiceExtension.Evaluate``1(GrapeCity.ActiveReports.Core.Rendering.IExpressionEvaluatorService,GrapeCity.Enterprise.Data.Expressions.ExpressionInfo)">Evaluate&lt;T&gt;(IExpressionEvaluatorService, ExpressionInfo)</h4>
<div class="markdown level1 summary"><p>Evaluate with simple default.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">public static T Evaluate&lt;T&gt;(this IExpressionEvaluatorService evaluator, ExpressionInfo exp)</code></pre>
</div>
<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="GrapeCity.ActiveReports.Core.Rendering.IExpressionEvaluatorService.html">IExpressionEvaluatorService</a></td>
      <td><span class="parametername">evaluator</span></td>
      <td></td>
    </tr>
    <tr>
      <td><a class="xref" href="../MESCIUS.ActiveReports.Core.Data.ExpressionInfo/GrapeCity.Enterprise.Data.Expressions.ExpressionInfo.html">ExpressionInfo</a></td>
      <td><span class="parametername">exp</span></td>
      <td></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><span class="xref">T</span></td>
      <td></td>
    </tr>
  </tbody>
</table>
<h5 class="typeParameters">Type Parameters</h5>
<table class="table table-bordered table-condensed">
  <thead>
    <tr>
      <th>Name</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><span class="parametername">T</span></td>
      <td></td>
    </tr>
  </tbody>
</table>


<a id="GrapeCity_ActiveReports_Core_Rendering_Expressions_EvalServiceExtension_Evaluate_" data-uid="GrapeCity.ActiveReports.Core.Rendering.Expressions.EvalServiceExtension.Evaluate*"></a>
<h4 id="GrapeCity_ActiveReports_Core_Rendering_Expressions_EvalServiceExtension_Evaluate_GrapeCity_ActiveReports_Core_Rendering_IExpressionEvaluatorService_GrapeCity_Enterprise_Data_Expressions_ExpressionInfo_System_Boolean_" data-uid="GrapeCity.ActiveReports.Core.Rendering.Expressions.EvalServiceExtension.Evaluate(GrapeCity.ActiveReports.Core.Rendering.IExpressionEvaluatorService,GrapeCity.Enterprise.Data.Expressions.ExpressionInfo,System.Boolean)">Evaluate(IExpressionEvaluatorService, ExpressionInfo, bool)</h4>
<div class="markdown level1 summary"><p>Evaluate as bool.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">public static bool Evaluate(this IExpressionEvaluatorService evaluator, ExpressionInfo exp, bool defVal)</code></pre>
</div>
<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="GrapeCity.ActiveReports.Core.Rendering.IExpressionEvaluatorService.html">IExpressionEvaluatorService</a></td>
      <td><span class="parametername">evaluator</span></td>
      <td></td>
    </tr>
    <tr>
      <td><a class="xref" href="../MESCIUS.ActiveReports.Core.Data.ExpressionInfo/GrapeCity.Enterprise.Data.Expressions.ExpressionInfo.html">ExpressionInfo</a></td>
      <td><span class="parametername">exp</span></td>
      <td></td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.boolean">bool</a></td>
      <td><span class="parametername">defVal</span></td>
      <td></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.boolean">bool</a></td>
      <td></td>
    </tr>
  </tbody>
</table>


<a id="GrapeCity_ActiveReports_Core_Rendering_Expressions_EvalServiceExtension_Evaluate_" data-uid="GrapeCity.ActiveReports.Core.Rendering.Expressions.EvalServiceExtension.Evaluate*"></a>
<h4 id="GrapeCity_ActiveReports_Core_Rendering_Expressions_EvalServiceExtension_Evaluate__1_GrapeCity_ActiveReports_Core_Rendering_IExpressionEvaluatorService_GrapeCity_Enterprise_Data_Expressions_ExpressionInfo___0_" data-uid="GrapeCity.ActiveReports.Core.Rendering.Expressions.EvalServiceExtension.Evaluate``1(GrapeCity.ActiveReports.Core.Rendering.IExpressionEvaluatorService,GrapeCity.Enterprise.Data.Expressions.ExpressionInfo,``0)">Evaluate&lt;T&gt;(IExpressionEvaluatorService, ExpressionInfo, T)</h4>
<div class="markdown level1 summary"><p>Evaluate with null value checks.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">public static T Evaluate&lt;T&gt;(this IExpressionEvaluatorService evaluator, ExpressionInfo exp, T defVal)</code></pre>
</div>
<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="GrapeCity.ActiveReports.Core.Rendering.IExpressionEvaluatorService.html">IExpressionEvaluatorService</a></td>
      <td><span class="parametername">evaluator</span></td>
      <td></td>
    </tr>
    <tr>
      <td><a class="xref" href="../MESCIUS.ActiveReports.Core.Data.ExpressionInfo/GrapeCity.Enterprise.Data.Expressions.ExpressionInfo.html">ExpressionInfo</a></td>
      <td><span class="parametername">exp</span></td>
      <td></td>
    </tr>
    <tr>
      <td><span class="xref">T</span></td>
      <td><span class="parametername">defVal</span></td>
      <td></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><span class="xref">T</span></td>
      <td></td>
    </tr>
  </tbody>
</table>
<h5 class="typeParameters">Type Parameters</h5>
<table class="table table-bordered table-condensed">
  <thead>
    <tr>
      <th>Name</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><span class="parametername">T</span></td>
      <td></td>
    </tr>
  </tbody>
</table>


<a id="GrapeCity_ActiveReports_Core_Rendering_Expressions_EvalServiceExtension_Evaluate_" data-uid="GrapeCity.ActiveReports.Core.Rendering.Expressions.EvalServiceExtension.Evaluate*"></a>
<h4 id="GrapeCity_ActiveReports_Core_Rendering_Expressions_EvalServiceExtension_Evaluate_GrapeCity_Enterprise_Data_Expressions_ExpressionInfo_GrapeCity_Enterprise_Data_DataEngine_ExpressionEvaluation_IExpressionContext_" data-uid="GrapeCity.ActiveReports.Core.Rendering.Expressions.EvalServiceExtension.Evaluate(GrapeCity.Enterprise.Data.Expressions.ExpressionInfo,GrapeCity.Enterprise.Data.DataEngine.ExpressionEvaluation.IExpressionContext)">Evaluate(ExpressionInfo, IExpressionContext)</h4>
<div class="markdown level1 summary"><p>Evaluate as object.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">public static object Evaluate(this ExpressionInfo expr, IExpressionContext context)</code></pre>
</div>
<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="../MESCIUS.ActiveReports.Core.Data.ExpressionInfo/GrapeCity.Enterprise.Data.Expressions.ExpressionInfo.html">ExpressionInfo</a></td>
      <td><span class="parametername">expr</span></td>
      <td></td>
    </tr>
    <tr>
      <td><span class="xref">IExpressionContext</span></td>
      <td><span class="parametername">context</span></td>
      <td></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.object">object</a></td>
      <td></td>
    </tr>
  </tbody>
</table>
</div>