Bind to a method in WPF?
- by Cameron MacFarland
How do you bind to an objects method in this scenario in WPF?
public class RootObject
{
public string Name { get; }
public ObservableCollection<ChildObject> GetChildren() {...}
}
public class ChildObject
{
public string Name { get; }
}
XAML:
<TreeView ItemsSource="some list of RootObjects">
<TreeView.Resources>
<HierarchicalDataTemplate DataType="{x:Type data:RootObject}"
ItemsSource="???">
<TextBlock Text="{Binding Path=Name}" />
</HierarchicalDataTemplate>
<HierarchicalDataTemplate DataType="{x:Type data:ChildObject}">
<TextBlock Text="{Binding Path=Name}" />
</HierarchicalDataTemplate>
</TreeView.Resources>
</TreeView>
Here I want to bind to the GetChildren method on each RootObject of the tree.
EDIT Binding to an ObjectDataProvider doesn't seem to work because I'm binding to a list of items, and the ObjectDataProvider needs either a static method, or it creates it's own instance and uses that.
For example, using Matt's answer I get:
System.Windows.Data Error: 33 : ObjectDataProvider cannot create object; Type='RootObject'; Error='Wrong parameters for constructor.'
System.Windows.Data Error: 34 : ObjectDataProvider: Failure trying to invoke method on type; Method='GetChildren'; Type='RootObject'; Error='The specified member cannot be invoked on target.' TargetException:'System.Reflection.TargetException: Non-static method requires a target.
