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Support for the ICollectionView Filter property

7 Answers 707 Views

GridView

This is a migrated thread and some comments may be shown as answers.

BF1468901 asked on 12 Dec 2013, 08:26 AM

Hello

I really appreciate the Rad Grid View filtering and grouping possibilities, but I have such case that I need to filter the source collection before it goes to your control. So I need in fact two filters, first I filter in code the collection and then I filter this filtered collection by your Rad Grid View.

So simply I have my ObservableCollection which is bounded to the Rad Grid View ItemsSource property. Then I am getting the collection view by the CollectionViewSource.GetDefaultView() method and I am applying there my custom filter to the Filter property.

The problem is that the Rad Grid View seems to not react on that change. So my question is do you support such approach? What else can I do to filter my item before I can filter them by the control UI?

Thank you for help.

My Rad Grid View XAML:

<telerikControls:RadGridView

HorizontalAlignment="Stretch"

ItemsSource="{Binding myCollection}"

SelectedItem="{Binding mySelectedItem, Mode=OneWayToSource}"

IsReadOnly="True"

CanUserFreezeColumns="False"

AutoGenerateColumns="False"

RowIndicatorVisibility="Collapsed">

7 Answers, 1 is accepted

Accepted

answered on 12 Dec 2013, 11:13 AM

Hi,

Indeed, you are right.
When using ICollectionView you can set the filter similar to:

var view = CollectionViewSource.GetDefaultView(Mycollection);

this.playersGrid.ItemsSource = view;



view.Filter = (o) => ((MyBusinessObject)o).Country ==

"Spain";

Please make sure that the ItemsSource of RadGridView is already set, so that the filter to take effect.

Do you set the view.Filter differently?

If you would like to wrap it into a QueryableCollecitonView, you can do it like so:

var view = CollectionViewSource.GetDefaultView(Mycollection);

QueryableCollectionView queryableView = new QueryableCollectionView(view);

this.playersGrid.ItemsSource = queryableView;

Then add a FilterDescriptor. For example:

queryableView.FilterDescriptors.Add(new FilterDescriptor("Country", FilterOperator.IsEqualTo, "England"));

Regards,
Didie
Telerik

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