# C1.DataConnector.AdoNet.C1ConnectionBase.GetIndexColumns

## Content

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<h1 id="C1_DataConnector_AdoNet_C1ConnectionBase_GetIndexColumns_" data-uid="C1.DataConnector.AdoNet.C1ConnectionBase.GetIndexColumns*">GetIndexColumns Method
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<div class="markdown level0 summary"></div>
<div class="markdown level0 conceptual"></div>



<a id="C1_DataConnector_AdoNet_C1ConnectionBase_GetIndexColumns_" data-uid="C1.DataConnector.AdoNet.C1ConnectionBase.GetIndexColumns*"></a>
<h4 id="C1_DataConnector_AdoNet_C1ConnectionBase_GetIndexColumns_System_String___" data-uid="C1.DataConnector.AdoNet.C1ConnectionBase.GetIndexColumns(System.String[])">GetIndexColumns(string[])</h4>
<div class="markdown level1 summary"><p>Retrieve the metadata relatively to the index columns.</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">protected virtual DataTable GetIndexColumns(string[] restrictionValues)</code></pre>
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  <pre><code class="lang-vbnet hljs">Protected Overridable Function GetIndexColumns(restrictionValues As String()) As DataTable</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="https://learn.microsoft.com/dotnet/api/system.string">string</a>[]</td>
      <td><span class="parametername">restrictionValues</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.data.datatable">DataTable</a></td>
      <td></td>
    </tr>
  </tbody>
</table>
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