CODEWITHSUNDEEP
c#wpfxaml
Amnestic
Amnestic

Reputation: 660

Can't find CollectionViewSource using FindResource

In my XAML code I have defined a CollectionViewSource as a grid resource:

<Grid.Resources>
        <CollectionViewSource x:Key="AgentsViewSource"
                          Source="{StaticResource Agents}">
            <CollectionViewSource.SortDescriptions>
                <componentModel:SortDescription PropertyName="ID" />
            </CollectionViewSource.SortDescriptions>
        </CollectionViewSource>
</Grid.Resources>

Further down as a child of a toolbox which again is a child of the grid I have a ComboBox which should change the SortDescription

<ComboBox Name="SortOrderBox" ItemsSource="{Binding AvailableProperties}" SelectionChanged="newSortOrder_OnSelectionChanged" Width="130" FontSize="15"/>

With the following code behind:

private void newSortOrder_OnSelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        var newSortOrder = (string) SortOrderBox.SelectedItem;
        var sortDescription = new SortDescription(newSortOrder, ListSortDirection.Descending);

        var source = (CollectionViewSource) FindResource("AgentsViewSource");

        source.SortDescriptions.Clear();
        source.SortDescriptions.Add(sortDescription);
    }

However, when I try to use FindResource I always get an exception. I really have no idea what I'm doing wrong, so all input is appreciated.

Upvotes: 0

Views: 645

Answers (1)

Rohit Vats
Rohit Vats

Reputation: 81253

You are trying to find resource under window/userControl resources.

Set x:Name on grid and call FindResource on grid instance because it is declared as a resource under grid and not under window/UserControl.

<Grid x:Name="grid">
   .....
</Grid>

Code behind:

grid.FindResource("AgentViewSource")

Upvotes: 2

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