Does (or will) a tool exist to convert WebForm view engine markup (aspx) to Razor view engine markup (cshtml)?
We too faced the problem of converting plenty of WebForms views to Razor. And guess what, we've also came up with a tool:
It also relies on regexes (and quite a few of them) to make sense of the WebForms mumbo-jumbo, much like the tool by JohnnyO. Ours might cover a few more cases, but don't take my word for it and try it on a few views instead.