Will page ports affect rankings?

moving from classic asp to .net

[Cluttermeleon]

I am in the process of porting www.mysite.com/widget/default.asp to www.mysite.com/widget/default.aspx i.e. from classic ASP to .net.

The page is cached in Google as www.mysite.com/widget/ and ranks well.

Will I jeopardise my existing rankings with this change - even though it is just the extension that's changing?

[tedster]

If the page is cached as www.mysite.com/widget/ then changing the resource to .apsx should not affect rankings. It's one of several good reasons to link in that fashion, rather than including the index page name and extension in the anchor.

[caveman]

What tedster said. I'd also add, for the sake of ensuring safety, that you be certain none of your pages are linked to using the filename in the URL string (i.e., including the "default.asp" or "default.aspx").