How to force BundleCollection to flush cached script bundles in MVC4

Question

... or how I learned to stop worrying and just write code against completely undocumented APIs from Microsoft. Is there any actual documentation of the official

Answer 1

Bearing in mind Hao Kung's recommendations to not do this because of web farm scenarios, I think there are a lot of scenarios where you might want to do this. Here is a solution:

BundleTable.Bundles.ResetAll(); //or something more specific if neccesary
var bundle = new Bundle("~/bundles/your-bundle-virtual-path");
//add your includes here or load them in from a config file

//this is where the magic happens
var context = new BundleContext(new HttpContextWrapper(HttpContext.Current), BundleTable.Bundles, bundle.Path);
bundle.UpdateCache(context, bundle.GenerateBundleResponse(context));

BundleTable.Bundles.Add(bundle);

You can call the above code at any time and your bundles will get updated. This works both when EnableOptimizations is true or false - in other words, this will throw out the correct markup in debug or live scenarios, with:

@Scripts.Render("~/bundles/your-bundle-virtual-path")