# FarPoint.Win.Spread.FilterItemCollection.Add

## Content

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<h1 id="FarPoint_Win_Spread_FilterItemCollection_Add_" data-uid="FarPoint.Win.Spread.FilterItemCollection.Add*">Add Method
</h1>
<div class="markdown level0 summary"></div>
<div class="markdown level0 conceptual"></div>



<a id="FarPoint_Win_Spread_FilterItemCollection_Add_" data-uid="FarPoint.Win.Spread.FilterItemCollection.Add*"></a>
<h4 id="FarPoint_Win_Spread_FilterItemCollection_Add_FarPoint_Win_Spread_IFilterItem_" data-uid="FarPoint.Win.Spread.FilterItemCollection.Add(FarPoint.Win.Spread.IFilterItem)">Add(IFilterItem)</h4>
<div class="markdown level1 summary"><p>Adds a filter item to the collection.</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 Add(IFilterItem filterItem)</code></pre>
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<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Public Function Add(filterItem As IFilterItem) 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>
    </tr>
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  <tbody>
    <tr>
      <td><a class="xref" href="FarPoint.Win.Spread.IFilterItem.html">IFilterItem</a></td>
      <td><span class="parametername">filterItem</span></td>
      <td><p>Custom filter item to add</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.int32">int</a></td>
      <td><p>The index of filter item to the collection.</p>
</td>
    </tr>
  </tbody>
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<h5 class="exceptions">Exceptions</h5>
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  <thead>
    <tr>
      <th>Type</th>
      <th>Condition</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.argumentexception">ArgumentException</a></td>
      <td><p>No display name or length of the display name of the specified filter is zero</p>
</td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.argumentexception">ArgumentException</a></td>
      <td><p>No specified custom filter or specified custom filter is null</p>
</td>
    </tr>
  </tbody>
</table>
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