ASP.NET WebForms: page data not cleared after redirect when returning with browser back

Here's a few different options to handle this with JavaScript:

You can detect if the page was navigated to from the browser history like in this answer.

Another option would be to show a panel (or if you have nothing to execute on the server side, just a button) with JavaScript telling it to redirect and remove the current page from navigation history: window.location.replace('your-link');

This code below will work for detecting if the page shown is loaded from cache instead of from the server, for instance if it was from forward/backwards navigation since that's what I needed in my application.

document.getElementsByTagName("BODY")[0].onpageshow = function() { if (event.persisted) { alert('Please refresh'); //your code here for what to do if page gets displayed from cache } };

The onpageshow event happens whenever the page is displayed, so it works just fine with navigation. event.persisted is a read-only property indicating if the webpage is loading from a cache. This ended up as the perfect solution for me when I was looking to do something similar.

Why your code isn't clearing the fields

When a method redirects, the only thing it tells the browser to do is redirect. It cannot pass the information required to tell your page to reset.