Rank: Member
Groups: Member
Joined: 8/21/2008
Posts: 24
|
Callback issue
I wonder, if there is a solution for this problem. I have a page with drop-down control and a callback panel. In the drop-down control, the user can select a year and with this selection, I change the data in a grid inside the callback panel. So far, everything works fine.
Additional there is a button on the page (outside the callback panel and it is no callback-trigger!) which calls another aspx-page by response.redirect (..). If the user returns to my page with the browsers back button, the last selected value in the drop-down control will be show, but not the related data in the grid on the callback panel.
As far as I can see, there is no event fired to update the callback panel, after returning.
Do you know a solution, to show the changed callback content after returning from another page?
Thank you for your help!
|
Rank: Administration
Groups: Administration
Joined: 5/27/2007
Posts: 24,196
|
Hi,
You should probably disable cache for the first page. When you use the browser's back button, it's almost for certain that you won't get any post back events (most server events such as ListBox or Button event are triggered on post back) because the browser will never do a post back request on "back" button. In fact most of the time the browser doesn't even send any request to the server at all --- it simply load the page from its cache. Because there is no request sent to your server at all, there is no chance for you to run any server side code. So the first step would be disabling cache to force the browser to at least send a get to your server. Once your server side is called, you can then figure out some mechanism to save/restore the page state.
Thanks!
|