I am reporting a button-sizing issue in Telerik UI for .NET MAUI RadCollectionView on iOS. A recycled item displays the correct button text but can retain the width allocated for the previous item’s longer text.

Environment

• Telerik UI for .NET MAUI 15.0.0; also reproduced with 14.1.0.
• .NET 10, Microsoft.Maui.Controls 10.0.80.
• Platform: iOS.
• No exception or error code accompanies the layout failure.

Reproduction sample:  CollectionViewButtonSizingRepro.zip 

The sample displays Telerik  RadCollectionView  and the built-in MAUI  CollectionView  side by side. Both use the same item template: Grid → Telerik RadButton, with no button width request. Each collection has independent data.

Telerik uses automatic item length ( ItemLength="-1" ); MAUI uses  MeasureAllItems . There are no custom handlers, manual recycling, or layout workarounds.

Steps to reproduce

1. Launch the sample on iOS. All buttons initially display Download.
2. Tap several buttons in the Telerik pane. Their text changes to Downloaded, requiring a wider button.
3. Scroll those rows completely out of view and continue through untouched Download items. Try both continuous scrolling and scrolling with pauses.
4. Repeat independently in the MAUI pane.

Expected: After recycling, each button is sized for its current text and image.

Actual: In the Telerik pane, a Download button can retain the wider allocation from the previous Downloaded state, leaving incorrect spacing. The same template does not reproduce the issue in the MAUI CollectionView pane. Upgrading to Telerik 15.0.0 does not resolve it.

Earlier diagnostics in our original application showed correct fresh button measurement after rebinding, but a stale arranged width without a corrective child arrangement when the footer’s bounds remained unchanged.

Thanks,

Mingxiao Ye

Null ref exception when getting value from a cell:

Exception.Message= Object reference not set to an instance of an object.

   at Telerik.Maui.Data.PropertyInfoFieldInfo.GetValue(Object item)
   at Telerik.Maui.Controls.DataGrid.CellsController`1.GetCellModel(IItemInfoNode parentRow, ItemInfo columnItemInfo, Int32 rowLine, Int32 columnLine, Boolean& preparedModel)
   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.MeasureChildren(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)

Provide a Telerik MAUI RefreshView control. 

This control should have integration at least with DataGrid and CollectionView. Now the Telerik CollectionView uses the MAUI RefreshView 

When wrapping the page content inside bottom sheet, provide an option for the content to extend under the safe area. (when setting the SafeAreaEdges to none)

When a RadPopup's content contains nested ContentViews and the Label's (Formatted)Text is assigned after the popup has been opened (IsOpen = true), the popup does not resize to fit the new content, so the text is clipped. Assigning the same text before opening renders correctly.

Steps to reproduce
1. Create a RadPopup whose content is a Label nested inside two ContentViews.
2. Open the popup (IsOpen = true).
3. Set the Label's FormattedText after opening.

When the Popup control is attached to the page, the "Top" and "Bottom" options of the Placement property does not respect correctly.

Hi Team,

I would like to be able to have client-side filtering/sorting/grouping capabilities for large backend datasets that cannot be entirely loaded on the client.

As it stands now, the DataGrid (and other data components) can only operate on the data that is has in the local DataView. This means that I need to build a custom filtering solution that prefilters/presorts the backend data before paging and loading it into the DataGrid.

To accomplish the "full view", we need a data layer that understands both the UI as well as the backend. The Telerik UI for WPF product has an excellent solution for this, known as the WPF EntityFrameworkCoreDataSource - Overview - Telerik UI for WPF and the WPF DataServiceDataSource - Overview - Telerik UI for WPF.

If such a feature can be added to Telerik UI for MAUI, it would be an excellent bonus for the component suite in data heavy applications.

Thank you,

Peter

 

When RadDataGrid uses LoadOnDemand with a plain ObservableCollection<T> as its ItemsSource, there is no supported API for the application to indicate that no further items are available.

As a result, the grid can continue raising LoadOnDemand requests after the data source has returned all available items. Applications must currently maintain pagination state and use a custom LoadMoreData command or other workarounds to prevent additional requests.

Provide a supported option that allows applications to stop load-on-demand once no further data is available. The grid should resume requesting items when the relevant data/query state changes.

On Android, the application crashes during login/navigation after the Telerik license warning overlay has been displayed. A subsequent overlay refresh deinitializes MAUI’s `WindowOverlay`, which attempts to remove its graphics view from a previously disposed native `CoordinatorLayout`.

The old Chart object supported LabelFitMode but the new Charts does not have this.  Provide a method to rotate the labels on an Axis.

The DataGrid is blank in when using AOT compilator

the following scenario: 2 property aggregate descriptors that use different properties than the property bound to the column and when editing the column, one of the property in the footer text does not update the value in the UI. 

option to have gradient and color change for the new charts

for example point markers on line, area, scatter line and spline series

provide tooltip/trackball on hover data point and when pressing the point- check the attached image. 

provide tooltip on hover the pie donut data point, also on selection to display the tooltip - image is attached

Provide cross hair feature similar to kendo -> https://www.telerik.com/kendo-jquery-ui/documentation/api/javascript/dataviz/ui/chart/configuration/axisdefaults.crosshair  

the requirement is exactly what you have on the kendo chart crosshair where the horizontal line follows the mouse while the vertical line locks to the nearest datapoint. 

Provide an option to display a chart title and align it to top left, right and center and bottom left, right and center

Provide an option to display a chart legend for pie and cartesian series. Also provide an option to change the legend position to be left, top, bottom, right position to the chart

now when navigating to the control using the tab key, the first segment gets focused, so I want first the entire control to get focused, then each segment. So provide an option to focus the entire control first using the tab key