The vertical scrollbar measure incorrectly when the control's ItemsSource is populated in its Loaded event. To reproduce this, set the ItemsSource when the control is initialized. And then populate it on Loaded. Also, to reproduce this you will need to define the columns manually.

To resolve this, populate the data on initialization of the gridview. Or delay the population to happen after the Loaded event. You can use a dispatcher for this.

As a workaround you can clear the SelectedCells collection in the Pasted event of the RadGridView.

This behavior is reproducible when the SelectionUnit property of the RadGridView is set to "FullRow".
SelectedCells collection is not of the selected row updated when new columns are added runtime. For example, you have selected the first row which has 3 cells. Then you add 2 new columns. Now the row has 5 cells but the selected cells collection still have 3.

A possible workaround which can be used is to reset the SelectedItem property of the RadGridView.

var selectedItem = testGrid.SelectedItem;
testGrid.SelectedItem = null;
this.testGrid.Columns.Add(new GridViewDataColumn() { Header = "Value3", DataMemberBinding = new Binding("Value3"), Width = 100 });
this.testGrid.Columns.Add(CreateColumn("Value4", "Value4"));
testGrid.SelectedItem = selectedItem;

The fix for this issue will be available with the next LIB (version 2018.3.1224) expected on Monday, December 24.

• Open the GridView examples
• In the available examples, select "Selection and Usability | Row Details"
• Select a row in the grid view
• In the external Details Presenter, select : nothing is displayed in the bottom.
• You have to select another row and then come back to show the detail.

 

The fix for this issue will be available with the next LIB (version 2018.3.1217) expected on Monday, December 17.

Change the Default Selected Filter Operator:
https://docs.telerik.com/devtools/wpf/controls/radgridview/filtering/how-to/howto-change-the-default-selected-filter-operator

This doesn't work for boolean columns, if the property "ShouldGenerateFieldFilterEditors" of the column is set to "True". 

Please see the attached example.

*** The fix for this issue will be available with the next LIB (version 2018.3.1217) expected on Monday, December 17.

To reproduce this:

1. Set the ShowToolTipOnTrimmedText property of RadGridView to True.
2. Hover a cell with trimmed text.
3. Before the tooltip shows, move the mouse quickly, outside of the RadGridView control.
4. Regardless of the fact that the mouse cursor is outside of the RadGridView control, the tooltip showing is not canceled and it shows after a second.

To resolve this, set the ShowToolTipOnTrimmedText of the gridview columns instead of the RadGridView control.

for radgridview,if CanUserFreezeColumns="True" ,
when adjust the FreezeColumnsResizer to the right,and then resize the left colum'width,
if exceed the visual area,these exceed area's column will disappear!
for example,the data virtualization sample for the radgridview,if set the FreezeColumnsResizer
to the 'Unit_Price' column behind,then adjust the 'Product_ID' column width to exceed the visual area,
at last by scroll,you can't find the exceed visual area columns

 Group rows which are not present in the view are not visualized when the window is maximized.

A possible solution here is to set the GroupRenderMode property to Flat.

This behavior is observed when Office2013 theme is applied. 

If your data contains uint, long or any numeric type different than Int32 or Decimal, the searching doesn't work.

Nested property definitions are visible in situations when they don't match the filtering criteria.

The following exception is observed in certain cases:

at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.FlatLayoutStrategy.RealizeMergedCells(Double frozenOffset, IEnumerable`1 mergedCells)

at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.FlatLayoutStrategy.CalculateMergedCells(Boolean shouldInvalidateMeasure)

at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.CalculateMergedCells(Boolean shouldInvalidateMeasure)

at Telerik.Windows.Controls.GridView.GridViewCellsPanel.ArrangeOverride(Size finalSize)

In multiple selection mode, the GridViewMutiColumnComboBox column does not respect its DisplayMemberPath property.

 

When the new value is selected from the GridViewMultiColumnComboBoxColumn, the event arguments in the CellEditEnded event does not contain the new value.