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POChange function in jQuery is firing twice on postback
 

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  1. POChange function in jQuery is firing twice on postback
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    <p>I am having an issue with the change function in jQuery 1.7.1 and postbacks. Basically I need to toggle the disabled attribute of buttons depending on whether an item is selected in the dropdown. In the code I have:</p> <pre><code>&lt;input type="button" id="btnRed" value="show Red" disabled="disabled" class="spButton" /&gt; &lt;input type="button" id="btnBlue" value="show Blue" disabled="disabled" class="spButton"/&gt; &lt;input type="button" id="btnYellow" value="show Yellow" disabled="disabled" class="spButton" /&gt; </code></pre> <p>I have my asp dropdown with autopostback set to true</p> <pre><code>&lt;asp:DropDownList ID="selAccount" runat="server" onselectedindexchanged="selAccount_SelectedIndexChanged" AutoPostBack="true"&gt; &lt;asp:ListItem Value="-1"&gt;select me&lt;/asp:ListItem&gt; &lt;asp:ListItem Value="234"&gt;234&lt;/asp:ListItem&gt; &lt;/asp:DropDownList&gt; </code></pre> <p>and the jQuery:</p> <pre><code> $(document).ready(function () { $("#selAccount").change(function () { var selValue = $(this).val(); if (selValue == '-1') { $(".spButton").attr("disabled", "disabled"); } else { $(".spButton").removeAttr("disabled"); } }); }); </code></pre> <p>invariably, when postback occurs, the buttons remain disabled. I tested with an enabled button and it is firing twice. i have tried different approaches (bin, unbind) to no avail. I got around this issue with a hidden variable set on the SelectedIndexChanged in code-behind and interrogating the hidden variable value in jQuery. is there an issue with the change method? is there a better way to do this? any insight would be appreciated. thanks,</p>
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    1. USjoseluisrod
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    1. COI tested this issue in Firefox and I get the same results.
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    2. COThe code flickers once with the desired behavior and then it goes back to disabled after postback.
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      1. USjoseluisrod
 

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