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POCascadingDropDown in TabContainer and Target in other Tab
 

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  1. POCascadingDropDown in TabContainer and Target in other Tab
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    <p>I have divised a page with a TabContainer.</p> <p>Before, this page worked with a CascadingDropDown that populate a DropDownList. Now this DropDownList is in another tab. So I catch an exception "Object Reference Null" when I try to see this page.</p> <p>How did runs to load a DropDownList in another Tab when I change a value in a different Tab ?</p> <p>Update:</p> <p>Thanks for your answer, but unfortunaly it doesn't work. </p> <p>I have tried with CascadingDropDownExtender outside the TabContainer, but Reference null is catched again. With CascadingDropDownExtender in same Panel as child DropDownList, I have a javascript alert that say Parent Control not found.</p> <p>Here the code with CascadingDropDownExtender in same Panel as child DropDownList</p> <p></p> <pre><code>&lt;cc2:TabPanel runat="server" HeaderText="Carte Identité" ID="TabCI"&gt; &lt;ContentTemplate&gt; &lt;ProspectMgt:MarketSegmentDropDownList ID="MarketSegmentDropDownList1" runat="server" AutoPostBack="false" Width="400px"&gt;&lt;/ProspectMgt:MarketSegmentDropDownList&gt; &lt;asp:CompareValidator ID="CompareValidator2" runat="server" CssClass="error" ToolTip="Required" ControlToValidate="MarketSegmentDropDownList1" ValueToCompare="-1" Operator="NotEqual" ErrorMessage="MktSegment" Display="Dynamic" Font-Bold="True"&gt;&lt;/asp:CompareValidator&gt; &lt;/ContentTemplate&gt; &lt;/cc2:TabPanel&gt; &lt;cc2:TabPanel ID="TabSize" runat="server" HeaderText="Size &amp; Volume"&gt; &lt;ContentTemplate&gt; &lt;asp:DropDownList ID="DropDownListSize" AutoPostBack="false" runat="server"&gt; &lt;/asp:DropDownList&gt; &lt;cc2:CascadingDropDown ID="cddSize" runat="server" TargetControlID="DropDownListSize" Category="Size" LoadingText="[...]" ServicePath="~/Modules/ProspectMgt/WebService/ServiceAjax.asmx" ServiceMethod="GetSizeByMktId" ParentControlID="MarketSegmentDropDownList1" /&gt; &lt;/ContentTemplate&gt; &lt;/cc2:TabPanel&gt; </code></pre> <p></p> <p>So I don't see why it is not working. It was working perfectly without TabContainer. I'm using AjaxToolKit 30512. However, I'm looking to drop CascadingDropDownExtender and manage this issue by javascript only.</p>
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