Binding Performance

[Oliver]

I'm creating a RadGridView programatically (see code below) and bind it to an ObservableCollection. I find the binding performance quite troublesome. When the Documents property the grid is bound to changes it takes approx 1.5sec before the grid is done. The documents collection never contains more than 200 items.

var List = new RadGridView
{
Name = "List",
RowIndicatorVisibility = Visibility.Collapsed,
IsReadOnly = true,
AutoGenerateColumns = false,
CanUserFreezeColumns = false,
CanUserResizeColumns = false,
IsFilteringAllowed = false,
ShowGroupPanel = false,
EnableRowVirtualization = true,
EnableColumnVirtualization = true,
SelectionMode = SelectionMode.Single,
Background = (Brush)Application.Current.Resources["DocumentList_Background"],
BorderBrush = (Brush)Application.Current.Resources["DocumentList_Border"],
Margin = new Thickness(9, 4, 8, 4)
};

listControl = List;

// bind items source to viewmodel
List.SetBinding(DataControl.ItemsSourceProperty, new Binding(ReflectionUtil.GetPropertyName(() => VM.Documents)));

List.Columns.Add(new GridViewDataColumn
{
Header = Strings.DocumentList_SummaryColumn_Header,
DataMemberBinding = new Binding("Summary"),
Width = new GridViewLength(1, GridViewLengthUnitType.Star),
ToolTipTemplate = (DataTemplate)Application.Current.Resources["DetailsListSummaryColumnToolTipTemplate"],
});

List.Columns.Add(new GridViewDataColumn
{
Header = Strings.DocumentList_UpdatedColumn_Header,
SortMemberPath = "LastUpdate",
Width = GridViewLength.Auto,
CellTemplate = (DataTemplate)Application.Current.Resources["DateLastUpdateColumnCellTemplate"],
ToolTipTemplate = (DataTemplate)Application.Current.Resources["DetailsListDateUpdatedColumnToolTipTemplate"],
});

// sync selected item with currently selected document
List.DataLoaded += (sender, e) =>
{
var MWVM = ServiceLocator.Get<MainWindowViewModel>();

List.SelectionChanged -= OnGridViewSelectionChanged;

if (MWVM.SelectedDocument != null)
{
List.ScrollIntoView(MWVM.SelectedDocument);
List.SelectedItem = MWVM.SelectedDocument;
}

List.SelectionChanged += OnGridViewSelectionChanged;
};

[Milan]

Hi Oliver,

Currently there are no know issues with performance. Could you please provide a sample application where the performance problem is evident?

Regards,
Milan
the Telerik team