I have a C#.NET web app that includes a list of service offerings, with a
button on each one for requesting additional information where the person
enters basic details like name, email address, etc.

However, due to privacy laws, any personal information gathered this way
must be over a secure connection, using SSL or TLS.

The way I have it coded right now is that the form, a FormView control and
associated DataSources, is hidden until the request button is clicked, then
it is shown.

Rather than redirecting the user to a new page, is there a way to change
from HTTP to HTTPS when the FormView is shown in the Page_Load event?