I have a one.aspx page that is running and I need to trigger a postback on two.aspx. Can this be done? If so, how?
ASP.NET Web Forms has such function so called the cross-page post back. If you use the control such as the Button, LinkButton and ImageButton in one.aspx to move to two.aspx set the URL of two.aspx to the PostBackUrl property of the control.
For detail, refer to the following Microsoft document: