# C1.Web.Mvc.FlexGridBase-1.ItemValidator

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<h1 id="C1_Web_Mvc_FlexGridBase_1_ItemValidator_" data-uid="C1.Web.Mvc.FlexGridBase`1.ItemValidator*">ItemValidator Property
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<a id="C1_Web_Mvc_FlexGridBase_1_ItemValidator_" data-uid="C1.Web.Mvc.FlexGridBase`1.ItemValidator*"></a>
<h4 id="C1_Web_Mvc_FlexGridBase_1_ItemValidator" data-uid="C1.Web.Mvc.FlexGridBase`1.ItemValidator">ItemValidator</h4>
<div class="markdown level1 summary"><p>Gets or sets a validator function to determine whether cells contain valid data.</p>
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<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">[JsonConverter(typeof(FunctionConverter))]
public virtual string ItemValidator { get; set; }</code></pre>
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  <pre><code class="lang-vbnet hljs">&lt;JsonConverter(GetType(FunctionConverter))&gt;
Public Overridable Property ItemValidator As String</code></pre>
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<h5 id="C1_Web_Mvc_FlexGridBase_1_ItemValidator_remarks">Remarks</h5>
<div class="markdown level1 remarks"><p>If specified, the validator function should take two parameters containing the cell's row and column indices, and should return a string containing the error description.  This property is especially useful when dealing with unbound grids, since bound grids can be validated using the <a class="xref" href="C1.Web.Mvc.BaseCollectionViewService-1.GetError.html#C1_Web_Mvc_BaseCollectionViewService_1_GetError">GetError</a> property instead.</p>
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