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POValidate dropdownlist using jquery
 

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  1. POValidate dropdownlist using jquery
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    <p>I have a registration form which uses one of jquery plugin for client side validation. I can validate textboxes and other controls but I have a problem with dropdownlist. I have a field on registration page</p> <pre><code>&lt;asp:DropDownList ID="ddlSector" runat="server" class="validateCallback my_code_callback"&gt;&lt;/asp:DropDownList&gt; </code></pre> <p>Those dropdown list outputs that</p> <pre><code>&lt;select name="ddlSector" class="validateCallback my_code_callback"&gt; &lt;option value="244"&gt;--Choose--&lt;/option&gt; &lt;option value="27"&gt;Hotel&lt;/option&gt; &lt;option value="28"&gt;Motel&lt;/option&gt; &lt;option value="29"&gt;Cottage&lt;/option&gt; &lt;/select&gt; </code></pre> <p>and I have such implementation on master template</p> <pre><code>&lt;script type="text/javascript" src="/scripts/uni-form-validation.jquery.js" charset="utf-8"&gt;&lt;/script&gt; &lt;script type="text/javascript"&gt; $(function () { $('form.uniForm').uniform({ prevent_submit: true }); }); window.my_code_callback = function (field, caption) { if (field.val() === '244') { return false; } } &lt;/script&gt; </code></pre> <p>in jquery file which does validation has such example</p> <pre><code> /** * Callback validator * * Lets you define your own validators. Usage: * * &lt;input name="myinput" class="validateCallback my_callback" /&gt; * * This will result in UniForm searching for window.my_callback funciton and * executing it with field and caption arguments. Sample implementation: * * window.my_callback = function (field, caption) { * if (field.val() === '34') { * return true; * } else { * return caption + ' value should be "34"'; * } * } * * @param jQuery field * @param caption */ validateCallback : function (field, caption) { var classes = field.attr('class').split(' '), callback_function = ''; for (var i = 0; i &lt; classes.length; i += 1) { if (classes[i] === 'validateCallback') { if (classes[i + 1] != 'undefined') { callback_function = classes[i + 1]; break; } } } if (window[callback_function] != 'undefined' &amp;&amp; (typeof window[callback_function] === 'function')) { return window[callback_function](field, caption); } return i18n('callback', caption, callback_function); } }; </code></pre> <p>How could I change the code so if visitor leaves the option --Choose--, it should display the error like other controls?</p>
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