When must we create site pages through visual studio?

Question

Generally site pages are created through SP designer. But what are business requirement when we MUST create site pages through visual studio rather than designer?

Answer 1

One requirement can be that client wants a Custom Site Template (like Team Site etc.) and the template will include few landing pages etc.

We can use SPWebProvisioningProvider class to activate features, add lists, pages etc.

For provisioning pages on List Creation, you can use ListAdded event receiver as shown in List Event Receiver in SharePoint 2010

For provisioning pages when a subsite is created, you can use WebProvisioned event receiver as shown in WebProvisioned Event receiver - a Practical Example