To reproduce this:

1. Set the GroupRenderMode of RadGridView to Flat.
   
2. Page RadGridView using RadDataPager.
   
3. Scroll to the last row in the view. Or scroll to any row so that few of the rows above are not longer visible.
   
4. Expand the row details and scroll down more until only the parent row is visible.
   
5. Collapse the row details. At this point, the vertical scrollbar disappears and the upper rows are not brought into the view as expected when the row details gets collapsed.

To work this around call the Rebind() method of RadGridView on RowDetailsVisibilityChanged event.

private void RadGridView_RowDetailsVisibilityChanged(object sender, Telerik.Windows.Controls.GridView.GridViewRowDetailsEventArgs e)
{
	if (e.Visibility == Visibility.Collapsed)
	{
		this.gridView.Rebind();
	}        
}

This behavior is reproducible when the HorizontalAligment property of the control or its parent element is set to Left.

The issue reproduces in the following situation.

• The selection mode is Extended and the selection unit is Mixed.
  
• Multiple rows are selected.
  
• Cells of the selected rows are updated.
  
• The column of the updated cells is previously sorted (before the update of the cell values).
  
• DataTable is used to populate the RadGridView control.

To work this around set the SelectionUnit property of RadGridView to FullRow or use a collection type like ObservableCollection<T> instead of a DataTable.

If the DisplayIndex of the columns is set when they are initialized, ColumnGroups are not displayed.

As a workaround, you can set the DisplayIndex after the columns are initialized. 

Hello, 

I believe that I have found a bug with the delete keyboard functionality using the delete key. Below are the steps to reproduce:

1. Click on any row of the grid view.
2. Observe the row is selected.
3. Click any cell in the selected row to enter into edit mode.
4. Exit edit mode using escape.
5. Observe the row is still selected.
6. Now click the delete button.
7. Observe the delete operation doesn't work.

Note that if the user selects a new row and then selects the previous row the delete works. 

Demo to illustrate is in SDK sample browser.

Grid View Examples - Custom Keyboard Command Provider

Please let me know if you need any additional information.

Thank you.

The class Telerik.Windows.Data.QueryableExtensions has a static dictionary "providerIsEntityFrameworkCore"

That dictionary will hold a reference (forever) to a collection that is set as Source for the GridView.

Reason is that non IQueryable-types will be wrapped in a EnumerableQuery<T> that will return itself as the provider (https://referencesource.microsoft.com/#System.Core/System/Linq/SequenceQuery.cs,44), encapsulating the reference.

This must be something introduced recently.

In this particular case, the DisplayIndex properties of the parent and child grid are bound to property from our ViewModel. When the parent grid columns are reordered runtime, the columns of the child grid are also reordered. But when sorting is performed by clicking on a column header, an exception is thrown.

Changing the TextAlignment property of the GridViewExpressionColumn doesn't refresh the cells, thus the change is not visible in the UI.

To work this around, remove and add again the corresponding column in the Columns collection of RadGridView. Or define a CellTemplate and use a TextBlock control with its TextAlignment bound to the column's property.

<telerik:GridViewExpressionColumn.CellTemplate>
	<DataTemplate>
		<TextBlock Text="{Binding}" 
				   TextAlignment="{Binding RelativeSource={RelativeSource AncestorType=telerik:GridViewCell}, Path=Column.TextAlignment}"  />
	</DataTemplate>
</telerik:GridViewExpressionColumn.CellTemplate>

Memory leak appears when exporting to Xlsx and Pdf formats.

To work this around, you can call one of the export methods GridViewDataControlExportExtensions with empty arguments.

Workbook workbook = this.gridView.ExportToWorkbook();
try
{
	GridViewDataControlExportExtensions.ExportToWorkbook(new RadGridView(), new GridViewDocumentExportOptions());
	GridViewDataControlExportExtensions.ExportToWorkbook(null);
}
catch (ArgumentException)
{
}        

I am using a RadGridView to display appointments. I am adding paging to the control with RadDataPager. I am setting the ItemSource property for the RadGridView to {Binding Path=PagedSource, ElementName=unscheduledWorkOrdersRadDataPager }. I am then overriding the ConvertDraggedData(object data) method and using the DataObjectHelper class in order to obtain data from the object data parameter and then setting the returned IEnumerable<IOccurence> accordingly.

The problem is that whenever I added paging to the RadGridView. The DataObjectHelper is not able to properly retrieve the dragged data from the object data parameter.