Some data is missing from the UI when grouping is applied and then filter the data.
If you ungroup, the items are displayed.
Starting with v10, all groups except the last, get a blank, empty row.
If you toggle off the grouping, the empty rows go away, but once you put the grouping on, these empty rows show up again.
Keep the data grouped, make the window a bit smaller so you have a decent amount of rows to scroll through, and using your mouse wheel, scroll up and down quickly. Eventually you'll notice that the grid will start to bounce a bit. For example, you'll scroll down and then without scrolling the mouse wheel up at all, it'll jump back up a few rows on its own.
Begin editing the first cell firs column
Without closing the cell editor, scroll down to the last cell, the first cell should exit the viewport.
Start editing the last cell.
Scroll back up to the first cell
The content inside the first cell is missing.
The content should be there.
When a ComboBox editor is open in the DataGrid, one can use the arrow keys to go up and down the items of the combo in order to make a selection. When pressing Enter it is expected that the ComboBox gets closed and the DataGrid is still in edit mode for the same cell.
However, when the Enter is pressed - the ComboBox closes and the next row goes into edit mode - this behavior is erroneous.
Requested Feature
A better approach that I am requesting a feature for is to have a property available for the DataGrid that sets this value ahead of time.
For example, you could add it as a BindableProperty on the GroupDescriptor class and on the GroupDefinition is to have an IsExapanded property.
A work-around is to remove the columns one by one:
for (int i = this.dataGrid.Columns.Count - 1; i >= 0; i--)
{
this.dataGrid.Columns.RemoveAt(i);
}
when applying Grouping and RowHeight to the DataGrid and expand the row details, the following happens -> The DataGrid in the RowDetails only appears for alternate rows.
In addition the RowHeight does not apply to the Grouping Row.
Workaround:
Remove the RowHeight from the DataGrid and set the CellContentStyle property to the columns and set the TextMargin to the DataGridTextCellStyle, and ButtonMargin to the DataGridToggleRowDetailsCellStyle. Here is an example when setting them to 0:
<telerik:DataGridTextCellStyle x:Key="cellStyle"
TextMargin="0"/>
<telerik:DataGridToggleRowDetailsCellStyle x:Key="toggleStyle"
ButtonMargin="0"/>
<telerik:RadDataGrid.Columns>
<telerik:DataGridToggleRowDetailsColumn CellContentStyle="{StaticResource toggleStyle}"
IsFrozen="True"/>
<telerik:DataGridTextColumn PropertyName="Country"
CellContentStyle="{StaticResource cellStyle}"
IsFrozen="True"
CanUserReorder="False" />
<telerik:DataGridTextColumn PropertyName="Capital"
CellContentStyle="{StaticResource cellStyle}" />
</telerik:RadDataGrid.Columns>
When we have ListenForNestedPropertyChange property set to true and at some point Clear of the ItemsSource is called the newly added items to the collection stop to listen for PropertyChanged.
In order to make ListenForNestedPropertyChange work again toggle the value of the property. First set it to false and after that back to true.
When uprating the row details data, the data does not update in the UI. You have to resize the window, or collapse then expand the row details to see the updated value.
The behavior happens in 7.0.0 version. In 6.8.0 it works as expected.