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POjQuery AJAX loop to refresh jQueryUI ProgressBar
 

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  1. POjQuery AJAX loop to refresh jQueryUI ProgressBar
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    <p>I've got a jQueryUI progressbar that should show the percentage of a query done. Oracle has a nice system table that lets you see operations that will take more than 10 seconds. I'm trying to make staggered $.ajax calls to this query in order to refresh the progress bar.</p> <p>Problem is, I can either get the loops to make rapid-fire requests without any wait time, or just delay the entire JavaScript from executing.</p> <p>I start the first request by clicking my "Execute" button in a jQueryUI dialog.</p> <pre><code>$("#dlgQuery").dialog({ buttons: { Execute: function () { $(this).dialog("close"); StartLoop(); } } }); </code></pre> <p>I'm trying to build either the <code>StartLoop()</code> function or make a recursive <code>GetProgress()</code> function. Ideally, I will have a public variable <code>var isDone = false</code> to act as my indicator for when to terminate the loop or stop recursively calling the function.</p> <p>For simplicity I have just made a static loop that executes 100 times:</p> <pre><code>function StartLoop(){ for (var i = 0; i &lt; 100; i++) { GetProgress(); } } </code></pre> <p>And here's my sample ajax request:</p> <pre><code>function GetProgress() { $.ajax({ url: "query.aspx/GetProgress", success: function (msg) { var data = $.parseJSON(msg.d); $("#pbrQuery").progressbar("value", data.value); //recursive? //GetProgress(); //if (data.value == 100) isDone = true; } }); } </code></pre> <p>So what I've found is, so far:</p> <p><code>setTimeout(GetProgress(), 3000)</code> in <code>StartLoop()</code> freezes Javascript, and the dialog does not close (I assume, because it will wait until the query is done).</p> <p><a href="http://www.sean.co.uk/a/webdesign/javascriptdelay.shtm">This</a> one, <code>pausecomp(3000)</code> does much the same thing.</p> <p>If I call either of these in the "success" function of my AJAX request, it gets ignored (probably because it's starting another call asynchronously).</p> <p>I'm kinda stuck here, any help would be appreciated, thanks.</p>
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    1. COinteresting question. :) I can't think of a good answer. Have you tried using setInterval at all? What happened when you tried the recursive method?
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    2. COI get rapid-fire requests/responses.
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