Foundation.MonoTouchException
  Message=Objective-C exception thrown.  Name: NSInternalInconsistencyException Reason: Expected dequeued view to be returned to the collection view in preparation for display. When the collection view's data source is asked to provide a view for a given index path, ensure that a single view is dequeued and returned to the collection view. Avoid dequeuing views without a request from the collection view. For retrieving an existing view in the collection view, use -[UICollectionView cellForItemAtIndexPath:] or -[UICollectionView supplementaryViewForElementKind:atIndexPath:]. Dequeued view: <Telerik_XamarinForms_DataControlsRenderer_iOS_ListView_UIListViewGroupHeaderCell: 0x7f9abcf816d0; baseClass = UICollectionViewCell; frame = (0 0; 402 684.667); alpha = 0; gestureRecognizers = <NSArray: 0x6000013bdbb0>; backgroundColor = <UIDynamicProviderColor: 0x600005bfa0c0; provider = <__NSMallocBlock__: 0x600001f18600>>; layer = <CALayer: 0x6000058a3140>>; Collection view: <TKCollectionView: 0x7f9ab9841000; baseClass = UICollectionView; frame = (0 0; 402 684.667); clipsToBounds = YES; autoresize = W+H; gestureRecognizers = <NSArray: 0x600001ca79c0>; backgroundColor = UIExtendedGrayColorSpace 0 0; layer = <CALayer: 0x600005a0cbc0>; contentOffset: {0, 0}; contentSize: {402, 646.33333333333326}; adjustedContentInset: {0, 0, 0, 0}; layout: <TKListViewLinearLayout: 0x7f9abe069fa0>; dataSource: <Telerik_XamarinForms_DataControlsRenderer_iOS_TKExtendedListView: 0x7f9ab7908580; frame = (0 0; 402 684.667); backgroundColor = UIExtendedSRGBColorSpace 1 1 1 1; layer = <CALayer: 0x60000180dae0>>>
Native stack trace:
0   CoreFoundation                      0x000000010d06d369 __exceptionPreprocess + 242
1   libobjc.A.dylib                     0x0000000117eb4106 objc_exception_throw + 62
2   Foundation                          0x000000011a8c56a8 _userInfoForFileAndLine + 0
3   UIKitCore                           0x00000001479bcb16 __43-[UICollectionView _updateVisibleCellsNow:]_block_invoke.1279 + 164
4   UIKitCore                           0x0000000148603c7f -[_UICollectionViewSubviewManager removeAllDequeuedViewsWithEnumerator:] + 256
5   UIKitCore                           0x00000001479bc46b -[UICollectionView _updateVisibleCellsNow:] + 5618
6   UIKitCore                           0x00000001479bc530 -[UICollectionView _updateVisibleCellsNow:] + 5815
7   UIKitCore                           0x00000001479c351d -[UICollectionView layoutSubviews] + 352
8   ClickOnCommunityApp.iOS             0x0000000102956cc3 -[TKCollectionView layoutSubviews] + 51
9   UIKitCore                           0x0000000148d6364f -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 2742
10  QuartzCore                          0x000000011dc8aec7 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 525
11  QuartzCore                          0x000000011dc971a3 _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 67
12  QuartzCore                          0x000000011dbaf2f1 _ZN2CA7Context18commit_transactionEPNS_11TransactionEdPd + 731
13  QuartzCore                          0x000000011dbe9b1a _ZN2CA11Transaction6commitEv + 728
14  QuartzCore                          0x000000011dbeb06e _ZN2CA11Transaction25flush_as_runloop_observerEb + 60
15  UIKitCore                           0x000000014860b3fe _UIApplicationFlushCATransaction + 57
16  UIKitCore                           0x00000001484f2d42 __setupUpdateSequence_block_invoke_2 + 437
17  UIKitCore                           0x00000001477b738c _UIUpdateSequenceRun + 55
18  UIKitCore                           0x00000001484f267f schedulerStepScheduledMainSection + 165
19  UIKitCore                           0x00000001484f17a4 runloopSourceCallback + 68
20  CoreFoundation                      0x000000010cfcc91e __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
21  CoreFoundation                      0x000000010cfcc860 __CFRunLoopDoSource0 + 157
22  CoreFoundation                      0x000000010cfcc065 __CFRunLoopDoSources0 + 203
23  CoreFoundation                      0x000000010cfc6774 __CFRunLoopRun + 960
24  CoreFoundation                      0x000000010cfc5fb3 CFRunLoopRunSpecific + 536
25  GraphicsServices                    0x00000001335f80cb GSEventRunModal + 137
26  UIKitCore                           0x000000014860cc3b -[UIApplication _run] + 875
27  UIKitCore                           0x0000000148611b7c UIApplicationMain + 123
28  ClickOnCommunityApp.iOS             0x0000000102f42c6a xamarin_UIApplicationMain + 58
29  ???                                 0x000000019d15febe 0x0 + 6930431678
On iOS 18.0 Grouped listview crash

  Source=Xamarin.iOS
  StackTrace:
  at ObjCRuntime.Runtime.ThrowNSException (System.IntPtr ns_exception) [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/16.4.0.23/src/Xamarin.iOS/ObjCRuntime/Runtime.cs:459 
  at ObjCRuntime.Runtime.throw_ns_exception (System.IntPtr exc) [0x00000] in /Users/builder/azdo/_work/1/s/xamarin-macios/runtime/Delegates.generated.cs:277 
  at (wrapper native-to-managed) ObjCRuntime.Runtime.throw_ns_exception(intptr)
  at (wrapper managed-to-native) UIKit.UIApplication.xamarin_UIApplicationMain(int,intptr,intptr,intptr,intptr&)
  at UIKit.UIApplication.UIApplicationMain (System.Int32 argc, System.String[] argv, System.IntPtr principalClassName, System.IntPtr delegateClassName) [0x00008] in /Library/Frameworks/Xamarin.iOS.framework/Versions/16.4.0.23/src/Xamarin.iOS/UIKit/UIApplication.cs:58 
  at UIKit.UIApplication.Main (System.String[] args, System.Type principalClass, System.Type delegateClass) [0x0003b] in /Library/Frameworks/Xamarin.iOS.framework/Versions/16.4.0.23/src/Xamarin.iOS/UIKit/UIApplication.cs:94 
  at ClickOnCommunityApp.iOS.Application.Main (System.String[] args) [0x00007] in C:\Sources\ClickOn\MobileCommunityGIT\ClickOnCommunityApp\ClickOnCommunityApp\ClickOnCommunityApp.iOS\Main.cs:13 

If you place a RadScrollView (or a control that includes it, such as the DataGrid) inside a TabView and scroll horizontally, switching the tabs leads to a NullReferenceException.

When the DataGrid has HeaderContentTemplate defined, and the app window is resized, the columns' header titles get misplaced, in a random way. 

In the RadCalendar, if we set the DisplayDate to future date (For example, current date is 04-03-2024 and the display date as 08-April-2024), application gets crashed in iOS platform. This issue occurs only in iOS 17 and above versions.

Exception

NSInternalInconsistencyException Reason: UIGraphicsBeginImageContext() failed to allocate CGBitampContext: size={0, 0}

It is not possible to reduce the height of the LoadOnDemandItemTemplate if the ItemLength in ListViewLinearLayout was modified on iOS.

Datagrid

 

Built in features for:

- Paging

        eg. https://demos.telerik.com/aspnet-mvc/grid/paging

- Search Panel

        eg. https://demos.devexpress.com/MVCxGridViewDemos/Filtering/SearchPanel

​- Sorting

        eg. https://demos.telerik.com/aspnet-mvc/grid/sorting

 

I am trying to replicate a part of our MVC application using xamarin.forms.
The forms  required will have a datagrid, when a row is clicked I want to open a pdfViewer.

These built in features would help me and others.

 

Regards,

Graham

 

When there are items in the Figures collection of a RadPathGeometry, and the Clear() method of the collection is called - an exception is thrownl.

When the Telerik Xamarin toolbox is in a partial-height tab (i.e. half the height), there isn't a scrollbar to see the off-screen controls.

Workaround: 
Make the toolbox full height of the tab to see all the controls. Here's a video demonstrating https://www.screencast.com/t/cUjIC0sx4 

An ArgumentException is raised when the DataGrid is unloaded in specific scenarios with the latest Q1 2024 release

When ListView is grouped, if you select an item and then try to collapse the group, an NSInternalInconsistencyException is raised on iOS.  The issue occurs on iOS version > 16.

When scrolling the AgendaView very fast the agenda scrolls endlessly. You can reproduce this in the QSF->Calendar and scheduler->agenda configuration example.

An arrow is displayed inside the appointment in cases when:

- when editing the appointment star end date and navigating to another week and then returning back to the week with the modified appointment

- adding new appointments to the week

 

App hangs when ListView uses dynamic size for the cells: 

iOS 16.7.5: Does not hang
iOS 17.3.1: Does not hang
iPadOS 16.3: Does not hang
iPadOS 17.1: Does not hang
iPadOS 17.2: Hangs/eventual app crash
iPadOS 17.3.1: Hangs/eventual app crash

Cells get completely unresponsive when resizing the app in multi day view

If there is MinDate defined, for example 13th July 5:45 PM and if the user tries to select 14th July 5:40 PM, the spinner redirects incorrectly to 5:45 PM.

Image gets a really dark or light when saving in a jpeg format. It works for png.

The issue occurs with SkiaSharp 2.88.6-preview 1.2. It works with versions: 2.88.5, 2.88.4, 2.88.3

Calling CollapseAll() on a RadTreeView after changing its ItemsSource causes an Exception on iOS.

Objective-C exception is thrown.  Name: NSInternalInconsistencyException Reason: attempt to delete item 9 from section 0 which only contains 8 items before the update

On Android, this works as expected.