The issue appears when the RadGridView control has several columns, some of the have fixed size (equal MinWidth and MaxWidth) and AutoSizeColumnsMode is Fill. The size of the not-fixed columns is calculated differently with each rebinding of the control.

Sorting of RadGridView slows down its performance when the control is used in self-reference hierarchy mode.

The issue appears when you perform the following steps in TableElement's Begin/EndUpdate batch operation:

1. Set RadGridView DataSource.
2. Execute the BestFitColumns() method of the control.
3. Set AutoSizeColumnsMode of RadGridView to GridViewAutoSizeColumnsMode.Fill.

The issue appears when the ViewDefinition of the control is ColumnGroupsViewDefinition, summary rows are added and grouping is performed.

RadGridView crashes when it is in AutoSizeRows rows and a third level hierarchy cell is edited.

The GroupRow Height cannot be changed when ColumnGroupsViewDefinition and HtmlViewDefinition are used.

The AlternatingRowColor value is restarted when the ViewDefinition is changed.

The correct behavior in this case is to load the GroupDescriptors from the file but do not process any grouping operations.

Scrolling with the mouse wheel and the keyboard could be improved in some scenarios.

Selecting multiple rows with the keyboard could be improved in some scenarios.

How to reproduce:

1. RadGridView control with two group levels. One group row in every second level groups. All groups are initially collapsed.
2. Expand the first group. The group row of its child group is created and the ViewCellFormatting event is raised for it. Collapse the group.
3. Expand the second group. The group row of the first child group is reused for the group row of the second child group. The ViewCellFormatting event is not raised for it.

RadGridView does not handle nullable DateTime objects correctly.

RadGridView does not update its UI when a new item is added to/remove from its child BindingList collection or a property of the child object is edited (INotifyPropertyChanged is implemented for the child object).

Comments: We will not support the case when adding/removing items and object relational hierarchy is used.

The issue appears when the form with the RadGridView control is minimized and the DataSource of the control is changed from 'null' to some value.

The vertical scrollbar of RadGridView does not recalculate correctly when the control has expanded hierarchical rows and the MasterTemplate sorting is changed.

Changing ThemeName of the context menu control in the ContextMenuOpening event handler should apply the new theme to the menu.

The current row of the control cannot be set to 'null' if RadGridView contains no data rows. The 'new' row remains current.

Steps to reproduce:

1. Create a RadGridView so that it contains enough rows to have a vertical and/or horizontal scroll bar.
2. Select a cell in the RadGridView.
3. Left mouse click (and hold) whilst scrolling the scrollbar, 'accidentally' hover over a new row/cell.
4. This causes the row to be highlighted (as per screenshot).

Added rows are lost in the following scenario of unbound RadGridView:
1. Setup master template;
2. Add rows to the master template;
3. Setup child template.

The MinHeight property of group rows is not considered when the control is in AutoSizeRows mode.