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| [WB21] - Hide/Show Controls |
| Iniciado por guest, 07,jun. 2016 20:44 - 4 respuestas |
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| Publicado el 07,junio 2016 - 20:44 |
Hi All
WebDev 21
Classic Site
Ajax off/not set
I have a page with 2 zones. On the one zone is a control with visible set to false at design time. On the other zone is a button. When the user clicks the button I want to test something on the server and, if OK, I want to make visible the control in the first zone.
I try this in the Server Code of the button:
PAGE_Start.ZONE_Navigation.MyControl..Visible = True && does not work
PAGE_Start.MyControl..Visible = True && does not work
No errors are generated but neither option works.
Is it possible to do this?
TIA |
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| Publicado el 07,junio 2016 - 21:00 |
Hi JP
yes it is...
1. make sure that the control is set as "dynamic"
2. set the button server code as ajax
That should do it
Best regards |
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| Publicado el 08,junio 2016 - 08:53 |
Fabrice,
Thanks I got that working. I made an error in my initial description of the problem; the button was in an iFrame which was in the second zone. When I moved the button off the iFrame and just placed it on the second zone itself everything worked. In addition, I did not need to make the control to hide "dynamic" and I did not need to make the code of the button as ajax !
So I have 2 questions which I hope you can give some comment on:
1) Why would this not work if the button is on an iFrame? How or why does the button-on-the-iFrame prevent this from working?
2) I notice that if the button code is set to "ajax" it hides the control faster i.e. it seems to be more responsive/quicker. Why is that? When should one use ajax and when not? |
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| Publicado el 08,junio 2016 - 16:09 |
Hi again
1. an iframe is a container for a separate web page. Therefore, if you want to do code from one page to the other, you'll need to use a syntax reflecting that (IF that works at all)
2. AJAX is made to allow refreshing PART of a page without having to send back and redisplay the whole page. So you want to use it when you need to do exactly that.
Best regards |
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| Publicado el 08,junio 2016 - 20:37 |
| Fabrice, thank you. I am making headway and really enjoying this ! Re-watched your WebDev tutorial again as a background refresher. |
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