在ASP.NET MVC 5中添加具有文件依赖项的操作结果缓存

Question

I am using .NET Framework 4.5.1 and ASP.NET MVC 5.

I have the following action:

    [OutputCache(Duration = 86400 /* 24 hours */, VaryByParam = "none")]
    public PartialViewResult WhatsNew()
    {
        var viewModel = new WelcomeWhatsNewViewModel
        {
            WhatsNewHeadlines = _service.GetWhatsNewHeadlines()
        };
        return PartialView("WhatsNew", viewModel);
    }

I am unclear on how I can add an action result cache with a file dependency, so that the cache is cleared when the razor view is updated. Is this possible?

I had a look through the ASP.NET MVC 5 source code but I couldn't see how to achieve this, and I did a bit of searching online yet failed to find anything explaining if this can be achieved or not.

Answer 1

When you modify a cshtml file, the next request will force a recompilation and the app domain will need to be unloaded, so httpruntime cache will be cleared which is what backs the outputcache. If for some reason this isn't happening.

Here is how you add cache dependency in your action

Response.AddCacheDependency(new CacheDependency(filename));