IE webbrowsercontrol losing .. in file path of URL

When a IE browser control is embedded in a winform a开发者_运维百科nd the link on a page contains a relative file path the URL coming into the callback for the navigate event seems to lose "file:///../../dir/file.htm" and becomes "file:///dir/file.htm"

private void OnNavigating(object sender, WebBrowserNavigatingEventArgs e)
{
 // looking at e.Url to see what happens
}

Has anyone seen similar problems? Any suggestions?

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I think your URL is incorrect. If you want a relative path, just specify a relative path, such as ../../dir/file.htm. If your URL starts with a protocol specifier, then it's an absolute URL, where a .. at the start is superfluous, since you're already starting at the root of the file system.

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file:///../../dir/file.htm is not a valid url. By definition the URI cannot be relative.

(Hence the 'U' in URI/URL)

I agree with other suggestions here: don't use file:///, just specify the relative path directly.