ScrollStateChanged Broken: Only Firing Once

[Ethan]

The ScrollStateChanged handler appears to be broken. It only fires the first time the state changes (ussaully from null to scrolling) but not when the user hits the end when it would normally hit the ScrollState.BottomStretch state. I was hoping to use this to detect when the user hits the end of the list in order to load more data, since the datarequested handler does not work as it should either.

Any help with this would be really appreciated.

Thanks,
Ethan Kusters

[Ves]

Hi Ethan,

Indeed, due to some changes made in Windows Phone 8.1 ScrollStateChanged event is not triggered correctly, so it will be removed. I am afraid we will also remove the DataRequested event in favor of another mechanism, similar to what is already available in our RadDataGrid for Windows 8. You can find it described here. For the time being please, do not use load-on-demand, but do let us know if you would like to receive an internal build, once this is implemented -- drop us  a line at universalwindows [at] telerik [dot] com, so that we can include you in our early adopters program.

Best regards,
Ves
Telerik

 

 

[Ethan]

Thanks for you help! Sending an email now.

[Alessandro]

Hi Ves,
I'm very interested in this topic as my Windows Phone App already makes great use of ScrollStateChanged event of the RadDataBoundList and hope you'll implement something else with the same feature.
I should have been already added as early adopter, I'd like to receive internal build too.

Best Regards

Alessandro

[Ves]

Hi Ethan, Alessandro,

I can confirm, you are both in the list. You will receive the internal build, once it is available.

Thanks,
Ves
Telerik

 

 

[Alessandro]

Hi Ves,
in the meantime as a  workaround I get the ScrollViewer inside DataBoundListBox and attach its event ViewChanged.
So I'm able now to know when the list is scrolling and stops scrolling.
Moreover I'm able to save , if I want, the position of the scrollviewer (verticaloffset) so that If the user navigates forward and back I can retain where the list was setting back the value.
It seems that TopVisibleItem property does work! so when the scrolling ends I can get it . Unfortunately I cannot use it in BringIntoView method as pointed out in other thread.

Keep the great work :)

Alessandro

[Christof]

Any new here?
I have the same DataRequested issue.

[Ivaylo Gergov]

Hi Christof,

In our upcoming release of the UI for Windows Universal(by the end of the month) we will introduce another mechanism for data virtualization similar to what is already available in RadDataGrid for Windows 8. You can find it described here : http://www.telerik.com/help/windows-8-xaml/raddatagrid-datavirtualization.html.

Let me know should you have any other questions.

Regards,
Ivaylo Gergov
Telerik