# C1.Win.GanttView.ColumnCollection.IndexOf

## Content

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<h1 id="C1_Win_GanttView_ColumnCollection_IndexOf_" data-uid="C1.Win.GanttView.ColumnCollection.IndexOf*">IndexOf Method
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<div class="markdown level0 summary"></div>
<div class="markdown level0 conceptual"></div>



<a id="C1_Win_GanttView_ColumnCollection_IndexOf_" data-uid="C1.Win.GanttView.ColumnCollection.IndexOf*"></a>
<h4 id="C1_Win_GanttView_ColumnCollection_IndexOf_System_Int32_" data-uid="C1.Win.GanttView.ColumnCollection.IndexOf(System.Int32)">IndexOf(int)</h4>
<div class="markdown level1 summary"><p>Searches for the specified ID and returns the zero-based index of the corresponding column.</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 int IndexOf(int id)</code></pre>
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  <pre><code class="lang-vbnet hljs">Public Function IndexOf(id As Integer) As Integer</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>
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  </thead>
  <tbody>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
      <td><span class="parametername">id</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.int32">int</a></td>
      <td></td>
    </tr>
  </tbody>
</table>


<a id="C1_Win_GanttView_ColumnCollection_IndexOf_" data-uid="C1.Win.GanttView.ColumnCollection.IndexOf*"></a>
<h4 id="C1_Win_GanttView_ColumnCollection_IndexOf_C1_Win_GanttView_TaskProperty_" data-uid="C1.Win.GanttView.ColumnCollection.IndexOf(C1.Win.GanttView.TaskProperty)">IndexOf(TaskProperty)</h4>
<div class="markdown level1 summary"><p>Searches for the specified value of <a class="xref" href="C1.Win.GanttView.TaskPropertyColumn.Property.html#C1_Win_GanttView_TaskPropertyColumn_Property">Property</a> and returns the zero-based index of the corresponding column.</p>
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<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">public int IndexOf(TaskProperty property)</code></pre>
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<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Public Function IndexOf([property] As TaskProperty) As Integer</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="C1.Win.GanttView.TaskProperty.html">TaskProperty</a></td>
      <td><span class="parametername">property</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.int32">int</a></td>
      <td></td>
    </tr>
  </tbody>
</table>
</div>