asp.net textbox doesn't populate after postback

Question

I am using ASP.NET and C# couple text boxes to calculate results entered. Textbox2 has a value entered and on button click Textbox1 gets populated. This works fine the first tim

Answer 1

Check the postback in the page_load function.

if(!Page.IsPostBack) {

}

I think you are loosing information on post back. The data is changed, but it get reset on post back.