I have a CollectionView with Groups which does not seem to be refreshing when groups are expanded/collapsed. If I move the control (kind of force a scroll) things seem to refresh
What can I do to force the control to refresh. Can I capture when the user Expand/Collapse and do a Load. I have looked at LoadOnDemand, but I don't see how this would work.
Example
Control before expand
After Expand (You can see Pipeline Device shows expanded, but nothing is visible)
After do a scroll on control
1 Answer, 1 is accepted
Hello Joe,
With .NET MAUI versions 9.0.30 and 9.0.40, we’ve observed several layout issues in RadCollectionView. I can confirm that the issue you’re encountering when groups are collapsed or expanded is one of these known issues. These issues are expected to be resolved with our next official release. In the meantime, I recommend reverting to version 9.0.14, which is the latest stable version of .NET MAUI released with Visual Studio. You can switch back to 9.0.14 by specifying the MauiVersion in your .csproj file.
I hope this information is helpful.
Regards,
Nasko
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To reproduce this issue you may use https://github.com/telerik/maui-samples/tree/main , start the ControlsSamples in iOS and you will see that with 9.0.40 you can't scroll through the list of controls on the main page.
hi Jones,
Use the maui version Nasko suggested. As Nasko explained with MAUI 9.0.30 and 9.0.40 we reproduced several issues in the RadCollectionView related to the layout, this includes scrolling, swiping, etc.
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I just wanted to give a very simple way for Telerik to reproduce the error.
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@NaskoTelerik
I am noticing some CollectionView scrolling issues on devices (everything works OK on iOS emulator). Is this related to this?
On my device scrolling does not work. I even added buttons to scroll as a temporary work-around where I get the first/last item and use ScrollItemIntoView and that does not work on device. Basically no scrolling
Also could you please send the page in which the behavior happens and a video of the issue?
I am going back through my builds, and it looks like the build prior to updating to net 9.0.200 is responding correctly. Although strangely, it seems OK on a device (iOS 18) but not running on a simulator (iOS 18).
Correct Behavior
After upgrading to net 9.0.200 and other references the not-refresh behavior begins. I am still working to see if I can identify an exact change that causes the issue
Edit: After cleaning up my system (uninstalling newer net 9 and removing app from simulator) I am seeing correct behavior on simulator
From testing the change:
Microsoft.Maui.Controls 9.0.30 > 9.0.40
is the breaking change.
.net SDK was kept at 9.0.102
Telerik was updated to 10.0 which works.
Something in the underlying Maui Controls affects this refresh behavior on the RadCollectionView