Null reference exception occurs with maui 10.0.90
Just add the datagrid definition in xaml or code behind and exception occurs.
Stack-trace:
at Microsoft.Maui.Controls.BindableObject.ApplyBindings(Boolean fromBindingContextChanged)
at Microsoft.Maui.Controls.BindableObject.SetInheritedBindingContext(BindableObject bindable, Object value)
at Microsoft.Maui.Controls.Element.SetChildInheritedBindingContext(Element child, Object context)
at Microsoft.Maui.Controls.TemplatedPage.SetChildInheritedBindingContext(Element child, Object context)
at Microsoft.Maui.Controls.Element.SetLogicalChildBindingContext(BindableObject child, Object bc)
at Microsoft.Maui.Controls.BindableObjectExtensions.PropagateBindingContext[T](BindableObject self, IEnumerable`1 children, Action`2 setChildBindingContext)
at Microsoft.Maui.Controls.Element.OnBindingContextChanged()
at Microsoft.Maui.Controls.VisualElement.OnBindingContextChanged()
at Microsoft.Maui.Controls.Page.OnBindingContextChanged()
at Microsoft.Maui.Controls.ContentPage.OnBindingContextChanged()
at Microsoft.Maui.Controls.BindableObject.BindingContextPropertyChanged(BindableObject bindable, Object oldvalue, Object newvalue)
at Microsoft.Maui.Controls.BindableObject.OnBindablePropertySet(BindableProperty property, Object original, Object value, Boolean didChange, Boolean willFirePropertyChanged)
at Microsoft.Maui.Controls.Element.OnBindablePropertySet(BindableProperty property, Object original, Object value, Boolean changed, Boolean willFirePropertyChanged)
at Microsoft.Maui.Controls.BindableObject.SetValueActual(BindableProperty property, BindablePropertyContext context, Object value, Boolean currentlyApplying, SetValueFlags attributes, SetterSpecificity specificity, Boolean silent)
at Microsoft.Maui.Controls.BindableObject.SetValueCore(BindableProperty property, Object value, SetValueFlags attributes, SetValuePrivateFlags privateAttributes, SetterSpecificity specificity)
at Microsoft.Maui.Controls.BindableObject.SetValue(BindableProperty property, Object value)
at Microsoft.Maui.Controls.BindableObject.set_BindingContext(Object value)
When navigating to DataGrid examples, xaml binding errors occur for ActualWidth and Header Text.
Still, the app runs as expected.
Hello,
it would be a very useful information when subscribing to the DataBindingComplete Command of a DataGrid to know whether for example a filter, sort, grouping had changed.
Currently, it is an internal Property
{
public IDataViewCollection DataView { get; internal set; }
internal DataChangeFlags ChangeFlags { get; set; }
internal DataBindingCompleteEventArgs()
{
}
}
Regards
I received the following stack traces when using aggregates and
Exception Message:
Object reference not set to an instance of an object
Exception Stack:
at Telerik.Maui.Data.ParallelDataEngine.Telerik.Maui.Data.IDataEngine.RebuildAggregatesForItem(Object item, String propertyName)
at Telerik.Maui.Data.LocalDataSourceProvider.ProcessPropertyChangedOverride(Object sender, PropertyChangedEventArgs args)
at Telerik.Maui.Data.LocalDataSourceProvider.DataView_ItemPropertyChanged(Object sender, PropertyChangedEventArgs e)
at Telerik.Maui.Data.EnumerableDataSourceView.Telerik.Maui.IWeakEventListener.ReceiveEvent(Object sender, Object args)
at Fmr.Sirius.ComponentModel.ObservableObject.FirePropertyChanged(IEnumerable`1 propertyChanges)
at System.Reactive.AnonymousSafeObserver`1.OnNext(T value)
at System.Reactive.Concurrency.AsyncLock.Wait(Object state, Delegate delegate, Action`2 action)
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location ---
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.TimerQueueTimer.System.Threading.IThreadPoolWorkItem.Execute()
at System.Threading.ThreadPoolWorkQueue.Dispatch()
at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart()
at System.Threading.Thread.StartCallback()
Exception.Stack 2:
at Telerik.Maui.Data.ParallelDataEngine.Telerik.Maui.Data.IDataEngine.RebuildAggregatesForItem(Object item, String propertyName)
at Telerik.Maui.Data.LocalDataSourceProvider.ProcessPropertyChangedOverride(Object sender, PropertyChangedEventArgs args)
at Telerik.Maui.Data.LocalDataSourceProvider.DataView_ItemPropertyChanged(Object sender, PropertyChangedEventArgs e)
at Telerik.Maui.Data.EnumerableDataSourceView.Telerik.Maui.IWeakEventListener.ReceiveEvent(Object sender, Object args)
at Fmr.Sirius.ComponentModel.ObservableObject.FirePropertyChanged(IEnumerable`1 propertyChanges)
at System.Reactive.AnonymousSafeObserver`1.OnNext(T value)
at System.Reactive.Linq.ObservableImpl.Sample`1._.Tick()
at System.Reactive.Concurrency.DefaultScheduler.PeriodicallyScheduledWorkItem`1.<>c.<Tick>b__5_0(PeriodicallyScheduledWorkItem`1 closureWorkItem)
at System.Reactive.Concurrency.AsyncLock.Wait(Object state, Delegate delegate, Action`2 action)
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location ---
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.TimerQueueTimer.System.Threading.IThreadPoolWorkItem.Execute()
at System.Threading.ThreadPoolWorkQueue.Dispatch()
at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart()
at System.Threading.Thread.StartCallback()
A NullReferenceException may occur during the DataGrid cell measure phase. The issue appears to happen when the cells are being generated or prepared for layout:
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.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)
when adding items to the collection bound to the datagrid ItemsSource, the empty template remains visible.
this was working with 11.1.0 version
having a datagrid with columns and setting the celleditor style to text column, then setting SelectionOnFocus to some value, then enter the edit mode, for example select all or cursor at start do not apply., always cursor at end applies.
The behavior also happens when using CellEditTemplate and there is RadEntry in it. The SelectionOnFocus does not apply.
Keyboard navigation to editable cells does not retain text selection. Having the SelectionOnFocus to “SelectAll” and the cell is in edit mode, the text gets selected
pressing enter or tab key, the text in the next cell is not selected.
I have tried implicit style, cell edit templates, same result, text gets deselected.
When the numerical column enters edit mode, in order to display the keyboard you need to tap one more time.
Outside of the datagrid, when the numeric input control gets focused, the keyboard appears.
Null reference exception occurs when measuring the cells container:
at Telerik.Maui.Controls.DataGrid.DataGridTextCellArranger.PrepareContainerForItemOverride(GridCellModel model)
at Telerik.Maui.Controls.DataGrid.DataGridNumericalCellArranger.PrepareContainerForItemOverride(GridCellModel model)
at Telerik.Maui.Controls.DataGrid.DataGridColumn.Telerik.Maui.Controls.DataGrid.IDataGridColumnDefinition.PrepareContainerForItem(GridCellModel model)
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)