Master-Detail Binding

Question

I am trying to implement simple master detail databinding C# WPF in Xaml. On the left side I have a listbox which is properly generated and on the right side I have a datagrid. When I click on left listbox I want my Datagrid to change accordingly. Currently I belive I have problem wtih SelectedItem path. Could someone give an advice?

public class Pipe
{
    public string ID { get; set; } 

    public ObservableCollection<Node> nodes = new ObservableCollection<Node>(); 
}

public class Node
{
    public int ID { get; set; }
    public double Distance { get; set; }    
}

ObservableCollection<Pipe>  p = new ObservableCollection<Pipe>();

After populating my Pipe Class I bind it via

lstLines.DisplayMemberPath = "ID";
lstLines.ItemsSource = p;

Until now everything work correctly. Next in Xaml I bind my datagrid to the SelectedItem of Listbox via :

ItemsSource="{Binding Path=SelectedItem.nodes, ElementName=lstLines, Converter={StaticResource debugConverter}}

Here is the problem .... I cant find the correct path so my datagrid is populated base on selecteditem of list. I've tried several variations but without lack.

Answer 1

Your Path is fine but you can bind only public properties and your nodes is a field:

public ObservableCollection<Node> nodes {get; set; }

you can initialize nodes in the Pipe constructor, but it must be a property