Question

AJAX popup to update parent window

Asked by: rwallacej

Hi

I have following situation. I'd hope this is possible to fix:

1) user control on a page with a dropdownlist. The dropdownlist is filled with data with a functions called FillData (this is already implemented)

2) button called "Add" on user control. Clicking on button displays AJAX popup. AJAX popup has some textboxes on it and a button "Save"

3) user clicks "Save" and a function "SaveData" is called to save inputs to file. AJAX popup is closed

4) function FillData is called and combobox updated.

Thanks in advance for help. The "missing link" is the call from the popup to update parent window.

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Asked On
2009-11-02 at 08:53:34ID24864251
Topics

Programming for ASP.NET

,

Asynchronous Javascript and XML (AJAX)

Participating Experts
1
Points
500
Comments
4

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Answers

 

by: sybePosted on 2009-11-02 at 09:16:20ID: 25721303

What is an "AJAX Popup"? I know what AJAX is and I know what a popup is. But the combination is weird. AJAX is usually used to update a part of the existing window without reloading the whole page. A popup is a separate (smaller) window, opened by javascript from the main window.

Anyway. To refresh the parent window, you could add some javascript to the popup just before it closes:
<script>
opener.refresh();
//above does not work in all browsers, but this should (as long as it is a GET, not sure about POST)
opener.location.href = opener.location.href;
</script>

 

by: rwallacejPosted on 2009-11-02 at 09:20:59ID: 25721347

I meant by AJAX popup the ModalPopupExtender..sorry should have been more explicit

I only want to update part of the existing window.
There are a lot of inputs on the page and a usercontrol. The usercontrol has a button called "Add" next to a dropdownlist.
When user clicks "Add" I want a popup to display for user to input a new item, and when they click "Save" the  new item added to a file, the popup closesd, and then the FillData method called to rebound to the dropdownlist.
I only want the dropdownlist to update, not a whole page refresh

Hope this makes sense

 

by: sybePosted on 2009-11-02 at 09:42:58ID: 25721580

Server -> prepares page (using ao. FillData)
Server -> sends page to browser
Browser -> opens popup
Browers (popup) -> submits information to server
Server -> processes information

Here is where you are. The server could send back information, but it will send it to the popup (because the popup submitted the information). The server has no other choice then send a response back to the exact same window as where the request came from.

So, if you close the popup, the server has nowhere left to response. You have to keep the popup open to wait for the response from the server. Then you can use the popup to talk to the parent window with javascript.

 

by: rwallacejPosted on 2009-11-02 at 10:09:57ID: 25721866

Thanks for explanation.  

 If I understand correctly it looks like I'm trying to do something that can't be done, i.e. calling code to repopulate the dropdownlist items on the "parent/owner" window using server side code (server side code reads the text file and populates it on Page_Load) after the users has added data to it from the modal popup...so I need to write the code to update dropdownlist from Javascript?

20120131-EE-VQP-002

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