An implicit style could be added:

<Style TargetType="telerik:FilteringControl" BasedOn="{StaticResource FilteringControlStyle}">
   <Setter Property="Background" Value="{telerik:FluentResource ResourceKey=AlternativeBrush}" />
</Style>

The fix for this issue is available with LIB (version 2018.3.1126) published on Monday, November 26.

The performance of the RadGridView scrolling diminishes significantly when the grid has thousands of rows and alternating row styles are used.  This causes scrolling to be virtually unusable.  I note this is a known limitation of the RadGridView from information from https://docs.telerik.com/devtools/wpf/controls/radgridview/troubleshooting/performance 

We have had to remove the alternating row styles from our current product while porting to the RadGridView.  I am requesting if this issue is going to be fixed in the future anytime soon.

The unconfirmed inputs of filter row editors are being destroyed together with the editor itself in column-visualized GridViews. There's an easy solution for it (store what was in there and restore upon recreation) and we're waiting for an official fix for this "expected behaviour" since three+ years.

As a Followup to this (Bad performance with grouping)Forumpost I managed to reproduce the issue now.
Since i cannot upload zip-files in the Forum I am doing it here.


The problem is, that a single grouping dramatically increases the time for sorting the values.
When the grouping is not present, sorting the same column is much faster.


It appears that it is related to the ammount of columns in total (not grouped).
The ammount of records is not so important, 100 (as in the attached sample) should not be significant.

The RowValidating event arguments give information about the edit operation that triggered the row validation - None, Edit or Insert. However, when the edit is canceled the EditOperationType is set to Edit. Change this and provide a new value (Cancel) or use None when the validation is canceled.

DataContext of rows is sometimes null when UI virtualization is enabled in the Flat group render mode.

The issue appears also without UI virtualization and in the Nested mode. It happens on ItemsSource reset of RadGridView, in case the old ItemsSource value wasn't empty. The DataContext is set to null for a brief moment before the old visuals are removed from the view, which causes issues in some scenarios related to CellTemplate

Available in LIB version 2017.3.1204, it will be also available in the R1 2018 Release.

When using Entity Framework Core 3 an InvalidOperationException is received upon adding an AggregateFunction to a column. 

The GroupRenderMode of the RadGridVIew is set to Flat. The control is populated with items that implement the IList interface. The Count property of the custom objects needs to return value bigger than 1. So when the Delete button is pressed, the rows beneath the deleted one will also be deleted. Their number depends on the Count property of the custom object.

 

Same as the one available in Excel. Please check the attached screenshot.

This happens in the following scenarios:

1. The FilterMemberPath points to the Date property of a DateTime one.
2. The column name contains "[]" square brackets.

The MatchAllTerms search mode doesn't behave as epxected when the GroupRenderMode property of RadGridView is set to Flat.

To work this around, set the GroupRenderMode property of RadGridView to True.

The fix for this issue will be available with the next LIB (version 2018.3.1126) expected on Monday, November 26.

When pasting data to create new rows(which are created in the AddingNewDataItem event), the pasting logic on the existing cells stops working.


Available in LIB version: 2017.2.529

When SpreadStreamExport.RunExportAsync() method is exporting large data it could take a while to export the grid. While exporting the grid, the ItemsSource changes to a new one with a different number of columns, NullReferenceException is thrown.

Provide a way to change the ItemsSource of the control while it is exporting using SpreadStreamExport.RunExportAsync() method