What does IsPostBack actually mean?

Question

I am interested to know what specifically Page.IsPostBack means. I am fully aware of it\'s day to day use in a standard ASP.NET page, that it indicates that the user is sub

Answer 1

Check the Request.Form collection to see if it is non-empty. Only a POST will have data in the Request.Form collection. Of course, if there is no form data then the request is indistinguishable from a GET.

As to the question in your title, IsPostBack is set to true when the request is a POST from a server-side form control. Making your form client-side only, defeats this.