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POHow to use Dropdown Extender to trigger OnSelectedIndexChanged event
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2013-02-12T21:02:13.970
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Body
I am trying to construct a Dropdown list using the AjaxToolKit's dropdownlistextender. I have the following markup: <pre><code><asp:Label ID="ddTest" runat="server" Text="Transactions" Width="300px" BorderColor="#C0C0C0" CssClass="selecter"/> <ajaxToolkit:DropDownExtender runat="server" ID="ddeSections" TargetControlID="ddTest" DropDownControlID="panelItems" HighlightBackColor="Silver" DropArrowBackColor="white" HighlightBorderColor="Silver"/> </code></pre> and the following for the "list" items: <pre><code> <table runat="server" id="ctlOptions" class="options" cellspacing="2" cellpadding="2" border="1"> <tr><td class="item" onmouseover="mouseOver(this)" onmouseout="mouseOut(this)" onclick="clickIt(this)">Transactions</td></tr> <tr><td class="item" onmouseover="mouseOver(this)" onmouseout="mouseOut(this)" onclick="clickIt(this)">The second option</td></tr> <tr><td class="item" onmouseover="mouseOver(this)" onmouseout="mouseOut(this)" onclick="clickIt(this)">The third option</td></tr> <tr><td class="item" onmouseover="mouseOver(this)" onmouseout="mouseOut(this)" onclick="clickIt(this)">The fourth option</td></tr> <tr><td class="item" onmouseover="mouseOver(this)" onmouseout="mouseOut(this)" onclick="clickIt(this)">The fifth option</td></tr> </table> </code></pre> my JavaScript looks like this: <pre><code>function mouseOver(obj) { if (obj) obj.className = 'itemOver'; } function mouseOut(obj) { if (obj) obj.className = 'item'; } </code></pre> where item and itemOver are appropriately styled CSS classes. The problem is that I want my onclick event to trigger a SelectedIndexChanged-type event on the server. I have tried with this function: <pre><code>function clickIt(obj) { var ddTest = document.getElementById("ctl00_ContentPlaceHolder1_ddTest"); var selVal = ''; if (ddTest) { selVal = obj.firstChild.nodeValue; ddTest.firstChild.nodeValue = selVal; __doPostBack('<%=ddSections.ClientID %>', ''); } } </code></pre> ddSections is an <code>asp:Dropdown</code> whose OnSelectedIndexChanged event I am attempting to fire. This triggers a page-level postback, but not the ddSections_SelectedIndexChanged server-side method that I want to trigger. The ddSections, incidentally, will be hidden. please can you offer some advice. I have spent three days trying to figure this out and have come up empty handed. Feel free to re-format for readability. Thanks in advance.
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<asp.net><dopostback><dropdownextender>
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How to use Dropdown Extender to trigger OnSelectedIndexChanged event
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