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Workaround for Valums AJAX File Upload IE9 Issues

, 25 Feb 2012 CPOL
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Workaround for Valums AJAX File Upload IE9 issues.

Andrew Valums wrote an excelent JavaScript upload script for uploading multiple files in browsers that support it, unfortunately it doesn’t work completely in IE9 (the upload progress indicator hangs).  I’m sure that in the near future a fix will be available but if you need to get it to work today one workaround is to enable IE 9 compatibility mode.

By adding a header in the head section of your HTML, you can enable IE7 compatibility mode.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
	<meta http-equiv="X-UA-Compatible" content="IE=7" >
</head>
</html>

It’s also possible to add this header in IIS (assuming you are using IIS, in other webservers probably a similar approach is available) to enable it site wide, if you don’t have the freedom to add the header in the HTML of existing websites.

Note: Enabling compatibility mode can have consequences for other parts of your website as well, be sure to properly test everything before applying this change

This gets the plugin to work properly under IE9 it’s probably not the best solution but it’s a workaround that fixed it for me in this scenario.

Sidenote: Make sure that the response of the upload is returned with the content type text/html IE doesn’t know what to do with the content type application/json.

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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wullinkm
Software Developer Dexchange Outsourcing
Netherlands Netherlands
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