Browser's backbutton trouble when using ajax calls

Question

I have a list with search results that is fetched through ajax (to be precise: the microsoft updatepanel). The problem is that I cannot use the backbutton of any webbrowser to navigate back to previous lists that I fetched through ajax. Do you have an idea?

Thanks

Answer 1

在url中添加一些内容，例如page.html#state1 ， page.html#state2等。这是一种常见的做法

Answer 2

You need to make all the ajax calls update the window.location.hash.

function getAjaxResource(id) {
  // some ajax stuff
  window.location.hash = 'resource=' + id;
}

Then you need to add a watcher to the hash with javascript's setInterval function.

var hash = window.location.hash;
window.setInterval(function () {
  if (window.location.hash != hash) {
    hash = window.location.hash;
    getAjaxResource(hash.replace('resource=',''));
  }
},100);

The hash changes every time the user clicks back/forward and the watcher will pick that change up.