# C1.Web.Mvc.DataMap.OnClientMapChanged

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<h1 id="C1_Web_Mvc_DataMap_OnClientMapChanged_" data-uid="C1.Web.Mvc.DataMap.OnClientMapChanged*">OnClientMapChanged Property
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<a id="C1_Web_Mvc_DataMap_OnClientMapChanged_" data-uid="C1.Web.Mvc.DataMap.OnClientMapChanged*"></a>
<h4 id="C1_Web_Mvc_DataMap_OnClientMapChanged" data-uid="C1.Web.Mvc.DataMap.OnClientMapChanged">OnClientMapChanged</h4>
<div class="markdown level1 summary"><p>Occurs when the map data changes.</p>
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<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">[Json(&quot;mapChanged&quot;)]
public string OnClientMapChanged { get; set; }</code></pre>
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  <pre><code class="lang-vbnet hljs">&lt;Json(&quot;mapChanged&quot;)&gt;
Public Property OnClientMapChanged As String</code></pre>
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