# GrapeCity.ActiveReports.Core.Rendering.IExpressionEvaluatorService

## Content

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



  <h1 id="GrapeCity_ActiveReports_Core_Rendering_IExpressionEvaluatorService" data-uid="GrapeCity.ActiveReports.Core.Rendering.IExpressionEvaluatorService" class="text-break">IExpressionEvaluatorService Interface
</h1>
  <div class="markdown level0 summary"><p>Allows an <a class="xref" href="../MESCIUS.ActiveReports.Core.Data.ExpressionInfo/GrapeCity.Enterprise.Data.Expressions.ExpressionInfo.html">ExpressionInfo</a> object to be evaluated.</p>
</div>
  <div class="markdown level0 conceptual"></div>
  <h6><strong>Namespace</strong>: <a class="xref" href="GrapeCity.ActiveReports.Core.Rendering.html">GrapeCity.ActiveReports.Core.Rendering</a></h6>
  <h6><strong>Assembly</strong>: MESCIUS.ActiveReports.Core.Rendering.dll</h6>
  <h5 id="GrapeCity_ActiveReports_Core_Rendering_IExpressionEvaluatorService_syntax">Syntax</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public interface IExpressionEvaluatorService</code></pre>
  </div>
  <h3 id="methods">Methods
</h3>
  <table class="table table-bordered table-condensed">
    <thead>
      <tr>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td id="GrapeCity_ActiveReports_Core_Rendering_IExpressionEvaluatorService_Evaluate_GrapeCity_Enterprise_Data_Expressions_ExpressionInfo_" data-uid="GrapeCity.ActiveReports.Core.Rendering.IExpressionEvaluatorService.Evaluate(GrapeCity.Enterprise.Data.Expressions.ExpressionInfo)">
          <a class="xref" href="GrapeCity.ActiveReports.Core.Rendering.IExpressionEvaluatorService.Evaluate.html#GrapeCity_ActiveReports_Core_Rendering_IExpressionEvaluatorService_Evaluate_GrapeCity_Enterprise_Data_Expressions_ExpressionInfo_">Evaluate(ExpressionInfo)</a>
        </td>
        <td class="markdown level1 summary"><p>Evaluates the <a class="xref" href="../MESCIUS.ActiveReports.Core.Data.ExpressionInfo/GrapeCity.Enterprise.Data.Expressions.ExpressionInfo.html">ExpressionInfo</a> object and returns the evaluated result or null if it cannot be evaluated.</p>
</td>
      </tr>
      <tr>
        <td id="GrapeCity_ActiveReports_Core_Rendering_IExpressionEvaluatorService_IsValid_GrapeCity_Enterprise_Data_Expressions_ExpressionInfo_" data-uid="GrapeCity.ActiveReports.Core.Rendering.IExpressionEvaluatorService.IsValid(GrapeCity.Enterprise.Data.Expressions.ExpressionInfo)">
          <a class="xref" href="GrapeCity.ActiveReports.Core.Rendering.IExpressionEvaluatorService.IsValid.html#GrapeCity_ActiveReports_Core_Rendering_IExpressionEvaluatorService_IsValid_GrapeCity_Enterprise_Data_Expressions_ExpressionInfo_">IsValid(ExpressionInfo)</a>
        </td>
        <td class="markdown level1 summary"><p>Determines whether the <a class="xref" href="../MESCIUS.ActiveReports.Core.Data.ExpressionInfo/GrapeCity.Enterprise.Data.Expressions.ExpressionInfo.html">ExpressionInfo</a> object is an expression that can potentially be evaluated. Expressions with invalid syntax return false.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h3 id="extensionmethods">Extension Methods</h3>
  <div>
      <a class="xref" href="GrapeCity.ActiveReports.Core.Rendering.Expressions.EvalServiceExtension.Evaluate.html#GrapeCity_ActiveReports_Core_Rendering_Expressions_EvalServiceExtension_Evaluate_GrapeCity_ActiveReports_Core_Rendering_IExpressionEvaluatorService_GrapeCity_Enterprise_Data_Expressions_ExpressionInfo_System_Boolean_">EvalServiceExtension.Evaluate(IExpressionEvaluatorService, ExpressionInfo, bool)</a>
  </div>
  <div>
      <a class="xref" href="GrapeCity.ActiveReports.Core.Rendering.Expressions.EvalServiceExtension.EvaluateBool.html#GrapeCity_ActiveReports_Core_Rendering_Expressions_EvalServiceExtension_EvaluateBool_GrapeCity_ActiveReports_Core_Rendering_IExpressionEvaluatorService_GrapeCity_Enterprise_Data_Expressions_ExpressionInfo_">EvalServiceExtension.EvaluateBool(IExpressionEvaluatorService, ExpressionInfo)</a>
  </div>
  <div>
      <a class="xref" href="GrapeCity.ActiveReports.Core.Rendering.Expressions.EvalServiceExtension.EvaluateLength.html#GrapeCity_ActiveReports_Core_Rendering_Expressions_EvalServiceExtension_EvaluateLength_GrapeCity_ActiveReports_Core_Rendering_IExpressionEvaluatorService_GrapeCity_Enterprise_Data_Expressions_ExpressionInfo_System_String_">EvalServiceExtension.EvaluateLength(IExpressionEvaluatorService, ExpressionInfo, string)</a>
  </div>
  <div>
      <a class="xref" href="GrapeCity.ActiveReports.Core.Rendering.Expressions.EvalServiceExtension.Evaluate.html#GrapeCity_ActiveReports_Core_Rendering_Expressions_EvalServiceExtension_Evaluate__1_GrapeCity_ActiveReports_Core_Rendering_IExpressionEvaluatorService_GrapeCity_Enterprise_Data_Expressions_ExpressionInfo_">EvalServiceExtension.Evaluate&lt;T&gt;(IExpressionEvaluatorService, ExpressionInfo)</a>
  </div>
  <div>
      <a class="xref" href="GrapeCity.ActiveReports.Core.Rendering.Expressions.EvalServiceExtension.Evaluate.html#GrapeCity_ActiveReports_Core_Rendering_Expressions_EvalServiceExtension_Evaluate__1_GrapeCity_ActiveReports_Core_Rendering_IExpressionEvaluatorService_GrapeCity_Enterprise_Data_Expressions_ExpressionInfo___0_">EvalServiceExtension.Evaluate&lt;T&gt;(IExpressionEvaluatorService, ExpressionInfo, T)</a>
  </div>
  <div>
      <a class="xref" href="GrapeCity.ActiveReports.Core.Rendering.Tools.ObjectExtensions.IsNumber.html#GrapeCity_ActiveReports_Core_Rendering_Tools_ObjectExtensions_IsNumber_System_Object_">ObjectExtensions.IsNumber(object)</a>
  </div>

</div>