Hello NG,

I am despairing, please help me.

With VS2005 i drag 2 Listboxes on my form and a bindingsource.
Listbox1 is bind to a bindingSource1.DataSource = data
Listbox2 is bind to a Listbox2.DataSource = subItemsBindingSource

all work as expected. When i select a item in listBox1, listbox2 display the details.

In the next step i implement
    private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (listBox1.SelectedIndex >= 0)
            listBox2.SelectedValue = _data[listBox1.SelectedIndex].SelectedSubItem.Name;
    }
to select a default value for listbox 2. Fine.

Trouble starts when i try to record the changes of listbox2 with
    private void listBox2_SelectedValueChanged(object sender, EventArgs e)
    {
        if (listBox2.SelectedIndex > 0)
            _data[listBox1.SelectedIndex].SubItemName = (string)listBox2.SelectedValue;
    }

What is the right / advised way to implement such a behaviour ?
Please Help.

----------------------
public class data
{
    private string _name;
    private string _subItemName;
    private subData _selectedSubItem;
    private List<subData> _subItems;

    public string Name { get { return _name; } set { _name = value; } }
    public string SubItemName { get { return _subItemName; } set { _subItemName = value; } }
    public List<subData> SubItems { get { return _subItems; } set { _subItems = value; } }
    public subData SelectedSubItem { get { return _selectedSubItem; } set { _selectedSubItem = value; } }
}

public class subData
{
    private string _name;
    public string Name { get { return _name; } set { _name = value; } }
    public subData(string n) { _name = n; }
}

public partial class Form1 : Form
{
    public data[] _data;
    public Form1()
    {
        InitializeComponent();
        _data = new data[] {new data(), new data(), new data() };
        _data[0].Name = "first";
        _data[0].SubItemName = "first_2";
        _data[0].SubItems = new List<subData>(new subData[] { new subData("first_1"), new subData("first_2"), new
subData("first_3") });
        _data[0].SelectedSubItem = _data[0].SubItems[1];
        _data[1].Name = "second";
        _data[1].SubItemName = "second_3";
        _data[1].SubItems = new List<subData>(new subData[] { new subData("second_1"), new subData("second_2"), new
subData("second_3") });
        _data[1].SelectedSubItem = _data[1].SubItems[2];
        _data[2].Name = "thhird";
        _data[2].SubItemName = "thhird_2";
        _data[2].SubItems = new List<subData>(new subData[] { new subData("thhird_1"), new subData("thhird_2"), new
subData("thhird_3") });
        _data[2].SelectedSubItem = _data[2].SubItems[1];

        bindingSource1.DataSource = _data;
    }
}
----------------------

Kind regards

Uwe