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POAdd checkboxlist item onclick of another checkbox
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  1. POAdd checkboxlist item onclick of another checkbox
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    copied!<p>I'm just wondering if there's a way to add a new checkbox item to an existing asp:checkboxlist control, when another checkbox is checked, without having to do a full postback of the page. Whether it's with javascript, jquery, ajax. Just wondering how (if at all) I can do something like this.</p> <p>I've been doing some research and it appears I can do a partial postback using an asp:UpdatePanel. I've never used one of these before. Does anyone have an example of how they can be used? Here's what I have, but it's still doing a full postback</p> <pre><code>&lt;asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional"&gt; &lt;ContentTemplate&gt; &lt;tr&gt; &lt;td width="50%"&gt; &lt;asp:CheckBox runat="server" ID="chkEnglish" Font-Bold="true" TextAlign="Right" Text=" English" /&gt; &lt;/td&gt; &lt;asp:Panel runat="server" ID="pnlTopLanguages"&gt; &lt;td rowspan="3" valign="top"&gt; &lt;asp:CheckBoxList ID="chkTopLanguages" CssClass="cb chkTopLangs" TextAlign="Right" runat="server" /&gt; &lt;asp:TextBox runat="server" ID="txtOtherLanguages" onkeyup="SetButtonStatus(this)" onclick="return clearLanguageSearchText()" Text="Other Languages..."&gt;&lt;/asp:TextBox&gt; &lt;asp:Button runat="server" ID="btnAddLang" Text="Add" OnClientClick="return CopyOtherLangs()" Enabled="false" /&gt;&lt;br /&gt;&lt;br /&gt; &lt;asp:CheckBox runat="server" ID="chkManyOtherLanguages" CssClass="cb" Font-Bold="true" Text="Many other languages" /&gt; &lt;cc3:AutoCompleteExtender ID="aceSearch" runat="server" MinimumPrefixLength="1" TargetControlID="txtOtherLanguages" ServicePath="~/controls/wsCommunity.asmx" ServiceMethod="GetLanguageCompletionList"&gt;&lt;/cc3:AutoCompleteExtender&gt; &lt;/td&gt; &lt;/asp:Panel&gt; &lt;/tr&gt; &lt;/ContentTemplate&gt; &lt;/asp:UpdatePanel&gt; </code></pre>
 

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