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POFiring SelectedIndexChanged event , but the listbox's autopostback property is false - ASP.NET
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  1. POFiring SelectedIndexChanged event , but the listbox's autopostback property is false - ASP.NET
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    copied!<p>I am using an update panel . In this update panel, there is a listbox control. I actually set autopostback property to false in code behind. But still it executing SelectedIndexChanged event if the selected index is changed. </p> <p>Why this happens?</p> <pre><code> &lt;asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional"&gt; &lt;ContentTemplate&gt; &lt;asp:MultiView ID="mvForms" runat="server" ActiveViewIndex="1"&gt; &lt;asp:View ID="View1" runat="server"&gt; &lt;asp:Panel ID="Panel5" runat="server" GroupingText="Available Evaluation Forms" meta:resourcekey="rsKey_panel5" Width="100%"&gt; &lt;asp:ListBox ID="lbAvailableForms" runat="server" AutoPostBack="true" style="height: 125px; width: 95%;" onselectedindexchanged="lbAvailableForms_SelectedIndexChanged"&gt;&lt;/asp:ListBox&gt; &lt;/asp:Panel&gt; &lt;/asp:View&gt; &lt;asp:View ID="View2" runat="server"&gt; &lt;asp:Panel ID="Panel11" runat="server" GroupingText="Available Evaluation Forms" meta:resourcekey="rsKey_panel11" Width="100%"&gt; &lt;div style="height: 125px; width: 95%; text-align:center;"&gt; &lt;br /&gt; &lt;br /&gt; &lt;asp:Label ID="lblAllSelected" runat="server" Text="All Selected" meta:resourcekey="rsKey_lblAllSelected"&gt;&lt;/asp:Label&gt;&lt;/div&gt; &lt;/asp:Panel&gt; &lt;/asp:View&gt; &lt;/asp:MultiView&gt; &lt;/ContentTemplate&gt; &lt;Triggers&gt; &lt;asp:AsyncPostBackTrigger ControlID="RLCompareParameter" EventName="SelectedIndexChanged"&gt;&lt;/asp:AsyncPostBackTrigger&gt; &lt;asp:AsyncPostBackTrigger ControlID="cbAllForms" EventName="CheckedChanged"&gt;&lt;/asp:AsyncPostBackTrigger&gt; &lt;/Triggers&gt; &lt;/asp:UpdatePanel&gt; </code></pre> <p>The listbox name is lbAvailableForms. While debugging i checked the autopostback property of this list box control, then i found that the property is false. Its looking so strange then how the selectedindexchanged event firing</p> <p>Here cbAllForm is a check box control and RLCompareParameteris a radilo list.</p> <p>Sometimes i need to get auto postback property is true. So initially i set this property to true. under RLCompareParameter_SelectedIndexChanged event , i set lbAvailableForms.Autopostback=false. But still after setting the property to false ,the listbox firing selected indexchanged event</p>
 

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