asp.net hidden field not retaining value when updated from code behind

Question

I\'m using a hidden field to store a value in an asp.net page. Basically I set the value of the hidden field whenever a value on the form is changed i.e. first name, date et

Answer 1

ViewState is persisting the value, so when the page reloads the ViewState has true in it, so asp.net updates the value of the control with true before the page renders.

Change your HiddenField to this:

This will prevent asp.net from maintaining the value of this field across postbacks, since your intention is to have it set to false each time the page loads.