Unplanned
Last Updated: 02 Jul 2025 19:16 by Teddy
Created by: Teddy
Comments: 0
Category: UI for .NET MAUI
Type: Feature Request
0

Hi Team,

We have a scenario where our license key file is hosted on a team-only file share. However, the file share only works with HTTP/S links and not a UNC path.

For example, this works perfectly:

TELERIK_LICENSE_PATH="\\internalshare\folder\telerik-license.txt"

However, we cannot use 

TELERIK_LICENSE_PATH="http://internalshare.com/telerik-license.txt"

You can reproduce this for yourself by trying it with Azure Blob Storage:

 

Thank you,

Teddy

In Development
Last Updated: 02 Jul 2025 14:16 by ADMIN
Created by: Gabriel
Comments: 0
Category: DataGrid
Type: Bug Report
2
When working in Windows with multiple monitors that have different display scales - dragging a window that contains a DataGrid with frozen columns would often lead to the frozen columns not getting rendered correctly. The frozen columns seem to not take into account the Dpi of the new monitor, but of the old one.
Completed
Last Updated: 02 Jul 2025 12:33 by ADMIN

the text in the spinner wraps when scrolling the spinner. 

The issue happens in Time, TimeSpan, Date and DateTime pickers with day, month, hour spinners. 

The issue happens in maui 9.0.60 and 9.0.70 versions.

It works with maui 9.0.50 and lower versions 

Unplanned
Last Updated: 02 Jul 2025 07:33 by ADMIN
Created by: Paul
Comments: 2
Category: DataGrid
Type: Feature Request
3
I would like to use a mouse to drag a row to a new spot in row order.

Found this info for WinForms, but not finding anything for MAUI RadDataGrid

https://docs.telerik.com/devtools/winforms/knowledge-base/gridview-drag-drop-bound-mode 

https://docs.telerik.com/devtools/winforms/controls/gridview/end-user-capabilities/reordering-rows 
Unplanned
Last Updated: 01 Jul 2025 15:13 by Christopher

When using a prism navigation:

await _navigationService.NavigateAsync(nameof(MainPageView));

the RadPopup will not show if its placement target is the new page.

Unplanned
Last Updated: 30 Jun 2025 12:13 by Stephen
A scenario with a requirement to display information about the entire group, including recursively all child groups, needs access to the actual items and/or subgroups. Exposing these and parent info would allow for greater flexibility in displaying custom information in group headers.
In Development
Last Updated: 30 Jun 2025 12:10 by ADMIN

I see iOS crashes in Sentry, seems like caused by clearing the RadCollectionView bound DataSource ObservableCollection, when an item was previously selected

Maui 9.0.70
Telerik 11.0

System.NullReferenceException: Arg_NullReferenceException
  ?, in void RadCollectionViewItemView.OnIsSelectedChanged()
  ?, in static RadCollectionViewItemView()+(BindableObject b, object o, object n) => { }
  ?, in void BindableObject.OnBindablePropertySet(BindableProperty property, object original, object value, bool didChange, bool willFirePropertyChanged)
  ?, in void Element.OnBindablePropertySet(BindableProperty property, object original, object value, bool changed, bool willFirePropertyChanged)
  ?, in void BindableObject.SetValueActual(BindableProperty property, BindablePropertyContext context, object value, bool currentlyApplying, SetValueFlags attributes, SetterSpecificity specificity, bool silent)
  ?, in void BindableObject.SetValueCore(BindableProperty property, object value, SetValueFlags attributes, SetValuePrivateFlags privateAttributes, SetterSpecificity specificity)
  ?, in void BindableObject.SetValue(BindableProperty property, object value)
  ?, in void RadCollectionViewItemView.set_IsSelected(bool value)
  ?, in void RadCollectionView.SelectContainers(IEnumerable items, bool select)
  ?, in void RadCollectionView.SelectionHelperSelectionChanged(object sender, RadSelectionChangedEventArgs e)
  ?, in void <>c__DisplayClass36_0.<SelectionChangerSelectionChanged>b__0(?)+() => { }
  ?, in void ActiveSelectionScope.Dispose()
  ?, in void SelectionHelper.ClearSelection()
  ?, in void RadCollectionView.Telerik.Maui.Controls.ICollectionView.ItemsChanged(NotifyCollectionChangedEventArgs e)
  ?, in void CollectionViewModel.OnDataProviderViewChanged(object sender, ViewChangedEventArgs e)
  ?, in void DataProviderBase.RaiseViewChanged(object sender, List<AddRemoveResult> changes, NotifyCollectionChangedEventArgs args, CollectionChange action, bool affectsAggregates)
  ?, in void LocalDataSourceProvider.ProcessCollectionChanged(NotifyCollectionChangedEventArgs e)
  ?, in void LocalDataSourceProvider.DataView_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
  ?, in void EnumerableDataSourceView.RaiseCollectionChanged(object sender, NotifyCollectionChangedEventArgs args)
  ?, in void EnumerableDataSourceView.ProcessCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
  ?, in void EnumerableDataSourceView.ProcessCollectionChangedOverride(object sender, NotifyCollectionChangedEventArgs args)
  ?, in void EnumerableDataSourceView.ProcessPendingCollectionChange()
  ?, in void DataProviderBase.RaiseViewChanging(object sender, IList changedItems, CollectionChange action)
  ?, in void LocalDataSourceProvider.DataView_CollectionChanging(object sender, NotifyCollectionChangedEventArgs e)
  ?, in void EnumerableDataSourceView.HandleCollectionChangedOverride(object sender, NotifyCollectionChangedEventArgs e)
  ?, in void EnumerableDataSourceView.Telerik.Maui.IWeakEventListener.ReceiveEvent(object sender, object args)
  ?, in void WeakEventHandlerList<NotifyCollectionChangedEventArgs>.ProcessEvent(object sender, object args)
  ?, in void WeakEventHandlerList<NotifyCollectionChangedEventArgs>.OnCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
  ?, in void ObservableCollection<ViewBundle>.OnCollectionChanged(NotifyCollectionChangedEventArgs)
  ?, in void ExtObservableCollection<ViewBundle>.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
  ?, in void ObservableCollection<ViewBundle>.OnCollectionReset()
  ?, in void ObservableCollection<ViewBundle>.ClearItems()
  ?, in void ExtObservableCollection<ViewBundle>.ClearItems()
  ?, in void Collection<ViewBundle>.Clear()
  ?, in void SearchViewViewModel.Dispose(bool disposing)
  ?, in void PropertyChangedNotifyingBase.Dispose()
  ?, in async void ViewBundle.Dispose(bool disposing)
  ?, in void <>c.<ThrowAsync>b__128_0(?)+(object state) => { }
  ?, in void NSAsyncSynchronizationContextDispatcher.Apply()
  ?, in void __Registrar_Callbacks__.callback_3311_Foundation_NSAsyncSynchronizationContextDispatcher_Apply(IntPtr pobj, IntPtr sel, IntPtr* exception_gchandle)

Unplanned
Last Updated: 27 Jun 2025 12:25 by Teddy

A NullReferenceException is thrown during the measure phase of a DataGridTextColumn when a CellRenderer is applied:

Object reference not set to an instance of an object.
   at Telerik.Maui.Controls.DataGrid.DataGridColumn.MeasureDrawingPaintable(LambdaPaintable lambdaPaintable, Object measureContext)
   at Telerik.Maui.Controls.SkiaSharp.SkiaLambdaPainter.Measure(MeasureablePaintable paintable, PurePainterContext context, Double widthConstraint, Double heightConstraint)
   at Telerik.Maui.Controls.DataGrid.MasterArranger.MeasureNodeContainer(Object container, Double widthConstraint)
   at Telerik.Maui.Controls.DataGrid.MasterArranger.MeasureNodeContainer(Object container, Double widthConstraint)
   at Telerik.Maui.Controls.DataGrid.MasterArranger.MeasureGridCellModel(GridCellModel model)
   at Telerik.Maui.Controls.DataGrid.CellModelGenerator.GetSize(GridCellModel decorator)
   at Telerik.Maui.Controls.DataGrid.CellsController`1.GenerateCellsForRow(IItemInfoNode rowModel, Int32 rowSlot)
   at Telerik.Maui.Controls.DataGrid.NodePool`2.GenerateModelsForInfos(IList`1 itemInfos, ModelGenerationContext modelGenerationContext, MeasureContext measureContext)
   at Telerik.Maui.Controls.DataGrid.NodePool`2.MeasureForward(MeasureContext& context)
   at Telerik.Maui.Controls.DataGrid.NodePool`2.MeasureVertically(RadSize availableSize, Double offset, Double verticalBuffer)
   at Telerik.Maui.Controls.DataGrid.NodePool`2.OnMeasure(RadSize availableSize, Double offset, Double verticalBuffer)
   at Telerik.Maui.Controls.DataGrid.GridModel.MeasureCells(RadSize availableSize)
   at Telerik.Maui.Controls.DataGrid.DataGridContentLayout.Measure(Double widthConstraint, Double heightConstraint)
   at Microsoft.Maui.Platform.MauiPanel.MeasureOverride(Size availableSize)
   at ABI.Microsoft.UI.Xaml.IFrameworkElementOverrides.Do_Abi_MeasureOverride_0(IntPtr thisPtr, Size availableSize, Size* result)
In Development
Last Updated: 27 Jun 2025 10:31 by ADMIN
when setting a custom font to the column header style, the DataGrid crashes with null ref exception on WinUI.
Unplanned
Last Updated: 27 Jun 2025 09:23 by Teddy
Currently, the PropertyGroupDescriptor in the DataGrid component does not support grouping by nested properties (e.g., Customer.Address.City). Enhance the PropertyGroupDescriptor to support nested property paths, allowing developers to group data based on sub-properties within complex objects. This would align with common data-binding patterns and improve the flexibility of the DataGrid for real-world scenarios involving nested data models.
Unplanned
Last Updated: 27 Jun 2025 08:14 by Stephen
When the CollectionView is grouped and an element is removed from the source collection and inserted again immediately after that, it results in its parent group not expanding/collapsing when tapped. The tap is registered and the visual indicator of the group state is changed but the group is not actually collapsing and expanding. This issue is happening for groups with only one child item. When scrolling so the group gets our of the visible area and then scroll to the group again, the collapse/expand functionality works.
Unplanned
Last Updated: 27 Jun 2025 07:24 by Teddy
When a column in the DataGrid is being resized and is subsequently scrolled out of the viewport, a NullReferenceException is thrown. This happens because the column's model is recycled while the resize operation is still in progress. As a result, the resize logic attempts to access a column from a recycled (and now null) model, leading to the exception.
Unplanned
Last Updated: 26 Jun 2025 14:37 by Teddy
An ArgumentException is thrown in the DataGrid when updating a property that exists only on a derived type of an object used in the grid's data source. This occurs specifically when a DelegateAggregateDescriptor is applied to a column.
Unplanned
Last Updated: 26 Jun 2025 13:09 by Stephen
When the client picks a random item from the ItemSource and changes the value of its property for which a GroupDescriptor is set, the CollectionView crashes.
In Development
Last Updated: 23 Jun 2025 06:26 by ADMIN
Scheduled for 11.0.1
when the developer does not have a license configured on their machine. Early on in the workflow of our app, the application will crash when we attempt to create a new PopupOverlay from an external dependency, such as the CommunityToolkit,
In Development
Last Updated: 23 Jun 2025 06:26 by ADMIN
Scheduled for 11.0.1
There is a memory leak in the TreeView on iOS/MacCatalyst - when the TreeView control is on the page, the page does not dispose when GC runs.
In Development
Last Updated: 23 Jun 2025 06:26 by ADMIN
Scheduled for 11.0.1
Created by: Nico
Comments: 1
Category: UI for .NET MAUI
Type: Bug Report
0

I have a user who reported a crash. In Sentry, I see this:

System.NullReferenceException: Object reference not set to an instance of an object.
  ?, in void TelerikLicense.ShowLicenseMessage(Page page)
  ?, in void TelerikLicense.VerifyLicense(Element element)+() => { }
  ?, in void TelerikLicense.ExecuteActionOnLoaded(Page page, Action action)
  ?, in void TelerikLicense.VerifyLicense(Element element)
  ?, in object <InitializeComponent>_anonXamlCDataTemplate_21.LoadDataTemplate()
  ?, in object ElementTemplate.CreateContent()
  ?, in void BindableLayoutController.CreateChildren()
  ?, in NotifyCollectionChangedAction NotifyCollectionChangedEventArgsExtensions.Apply(NotifyCollectionChangedEventArgs self, Action<object, int, bool> insert, Action<object, int> removeAt, Action reset)
  ?, in void BindableLayoutController.ItemsSourceCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
  ?, in void WeakNotifyCollectionChangedProxy.OnCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
  File "ObservableCollection.cs", line 192, in void ObservableCollection<T>.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
    handler(this, e);
  ?, in void ExtObservableCollection<T>.RaiseCollectionChanged()

the app was built with a successful license-check
Telerik.Licensing 1.6.6

 

In Development
Last Updated: 23 Jun 2025 06:26 by ADMIN
Scheduled for 11.0.1
When calling Focus() programmatically, the keyboard does not appear. 
In Development
Last Updated: 23 Jun 2025 06:26 by ADMIN
Scheduled for 11.0.1

When having a CollectionView and navigating between different views when tapping on an item from the CollectionView, the item(s) look(s) selected. 

It seems the behavior is due to the mouse over and selected visual states.

In Development
Last Updated: 23 Jun 2025 06:26 by ADMIN
Scheduled for 11.0.1
If you use FooterContentTemplate to add elements into the footer that require mouse over/click events (eg a Button or a Label with a tooltip), it works fine as long as the datagrid has enough data to scroll. However, if you resize the grid bigger or remove items until you no longer need to scroll and you have empty space between the last row and the footer, then none of those mouse events work.
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