Passing value from code-behind to Javascript

Question

I am using a jQueryUI ProgressBar to show users how much allowed file storage they have used. The percentage is calculated in code-behind and should be passed to Javascript.

Answer 1

since your hidden field is a server control it could be that the ID is getting generated to something other than filesPercentage (probably something like ctl00_ctl00_filesPercentage)

• You may need to apply the generated client ID to your javascript document.getElementById("<%=filesPercentage.ClientID%>").value;
• Or use another way of selecting the hidden value, such as $('[hidden's parent element] input[type="hidden"]').val()

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additionally, it looks like progressbar value is expecting a number, so you may need to do value: pct * 1 or value: parseInt(pct)

http://jsfiddle.net/pxfunc/QyZSs/