Thank you for your useful post.
I've tried to implement custom route myself.
However, it does not work.

My custom route is OggHandler and it is not called.

I have posted the question at stackoverflow

http://stackoverflow.com/questions/8550911/custom-route-is-not-called-for-asp-net-mvc-3-application-net-4

and can download link at

http://codesanook.com/shared/MvcOgg.zip

[...] I use Routing to re-route URL's to actual physical files. My code is pretty identical to this one. [...]

<img src="" alt="">

My class looks like this:

public static class ImageHelper
{
public static string ImgUrl(string applicationPath, string filename)
{
if (applicationPath == "/")
{
return "/Images/" + filename;
}
else
{
return applicationPath + "/Images/" + filename;
}
}
}

Thanks for this great guide! It's been most helpful. I've got everything to work fine in my local test environment where my application runs in the root of the development webserver.

I'm having a problem however when uploading my application to my production server, where the application resides within a subdir of the root. How am I supposed to acces my images in this way?

Kind regards,
Erwin

I dont think the implementation in GetHttpHandler should be writing to the Response. It is a Get method and should not have a state change. Ideally a seperate class which implements IHttpHandler interface should take care of writing to the Reponse. and the main Route Handler should just create an instance of it and return in GetHttpHandler. I implemented something similar when i had to serve static content (css,js,images)

Hey Brian,

Absolutely – you can use the catch-all parameter in ASP.Net MVC for this. Define your route like:

"graphics/{filepath*}"

and it will capture the rest of the URL string without splitting it.

(Apologies for the late reply… I didn't seem to get a notification about this comment…)

I wonder what you would do if you had a folder in your /graphics directory, like:
/graphics/icons/add.gif

I believe it will not match the route (because it will split {filename} once it encounters the "/" between "icons" and "add".

Is there a way to get the URL to ignore the slashes, so that it is essentially
"graphics/{filepath}"?