# C1.Web.Mvc.MultiRow.MultiRow-1.OnClientCollapsedHeadersChanging

## Content

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<h1 id="C1_Web_Mvc_MultiRow_MultiRow_1_OnClientCollapsedHeadersChanging_" data-uid="C1.Web.Mvc.MultiRow.MultiRow`1.OnClientCollapsedHeadersChanging*">OnClientCollapsedHeadersChanging Property
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<a id="C1_Web_Mvc_MultiRow_MultiRow_1_OnClientCollapsedHeadersChanging_" data-uid="C1.Web.Mvc.MultiRow.MultiRow`1.OnClientCollapsedHeadersChanging*"></a>
<h4 id="C1_Web_Mvc_MultiRow_MultiRow_1_OnClientCollapsedHeadersChanging" data-uid="C1.Web.Mvc.MultiRow.MultiRow`1.OnClientCollapsedHeadersChanging">OnClientCollapsedHeadersChanging</h4>
<div class="markdown level1 summary"><p>Occurs after the value of the collapsedHeaders property changes.</p>
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<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">public string OnClientCollapsedHeadersChanging { get; set; }</code></pre>
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  <pre><code class="lang-vbnet hljs">Public Property OnClientCollapsedHeadersChanging As String</code></pre>
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