How to version MVC JavaScript includes [duplicate]

Question

Possible Duplicate:
force browsers to get latest js and css files in asp.net application

I'm working with someone else's code, so I don't know the whole picture, and I don't even know MVC that well, but here's the problem...

In Site.Master there's a

<%= Html.IncludeJs("ProductPartial")%>

which produces this line in the final mark-up

<script type="text/javascript" src="/Scripts/release/ProductPartial.js"></script>

I made some changes in the JS file, but the old one is obviously cached by the browser, so the changes won't show up until the user refreshes. The usual workaround is to add a version tag at the end of the script source path, but I'm not sure how to do that in this case.

Any suggestions?

Answer 1

Why not write your own Html helper extension method, and make it output the version number of your application assembly? Something along these lines should do the trick:

public static MvcHtmlString IncludeVersionedJs(this HtmlHelper helper, string filename)
{
    var version = Assembly.GetExecutingAssembly().GetName().Version;
    return MvcHtmlString.Create(filename + "?v=" + version);
}

You can then increment the version number of the assembly whenever you release a new version to your users, and their caches will be invalidated across the application.