Treeview.SeletedItem as paramter for ObjectDataProvider

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XAML

WPF

Hi@all,

it's possible to give Parameter to an ObjectDataProvider (ODP).

E.g.:

<TextBox.Text><Binding Source="{StaticResource MyODP}"
                                                 Path="MethodParameters[0]"
                                                 BindsDirectlyToSource="true"
                                                 UpdateSourceTrigger="PropertyChanged" />
                                            </TextBox.Text>

In my app I have two ObjectDataProvider.
I'm using the first one to build a Treeview (using HierarchicalDataTemplate/DataTemplate) It's possible to filter the Treeview (first ODP), using the solution I have posted above.
(It must not be a TextBox. Its also possible with a CheckBox, etc.)

Now I want to filter the second ODP. As Parameter for the second ODP I want to use Treeview's SelectedItem (a property of the object behind)
I have no Idea how to to realize that :((

Treeview's Datatemplate:

<DataTemplate x:Key="myItemTemplate" DataType="{x:Type MyDataObject}">
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="{Binding Name}"/>
.....

Thank you in advance!