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POjquery - creating a generic ajax function
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  1. POjquery - creating a generic ajax function
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    copied!<blockquote> <p><strong>Possible Duplicate:</strong><br> <a href="https://stackoverflow.com/questions/3203283/jquery-ajax-always-returns-undefined">jQuery Ajax always returns &ldquo;undefined&rdquo;?</a> </p> </blockquote> <p>I'm trying to come up with a generic jquery ajax function which takes the url &amp; parameters and returns the result. I'm trying to avoid using <code>async:false</code> as it locks up the browser. If I use <code>success</code> callback in the ajax call, the data returned is null due to the timing issue (success doesn't wait until the data is returned). If I use <code>complete</code>, the <code>persons</code> object is still null in the <code>LoadPersons</code> method as it doesn't wait for the data to be returned from the ajax call. If place an <code>alert(persons)</code> in the <code>complete</code> callback, I get <code>[object][Object]</code> so I'm getting the data back. How do I "fix" this issue? Am I talking sense? I would also ideally like to show a "loading.." image while it's doing this.</p> <p>Here's my code -</p> <pre><code> &lt;script type="text/javascript"&gt; $(function() { var persons; var urlGetPersons = "Default.aspx/GetPersons"; LoadPersons(); function LoadPersons() { persons = CallMethod(urlGetPersons, { }); if (persons != null) { // do something with persons. } } function CallMethod(url, parameters) { var data; $.ajax({ type: 'POST', url: url, data: JSON.stringify(parameters), contentType: 'application/json;', dataType: 'json', success: function(result) { data = result.d; }, // use success? complete: function(result) { data = result.d; } // or use complete? }); return data; } }); &lt;/script&gt; </code></pre>
 

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