Question

I have a ListBox bound to a collection of objects, and everything works except I don’t know how to call some code I need executed when an item in the list is selected.

To be clear, I have already hooked up the Listbox_SelectionChanged event for when the user selects a different item – and that works fine.

When the ListBox is first shown, though, I want to call that same code on the first item in the list, which it defaults to. Something like ListBox_BoundDataFinishLoading, or something..

Any ideas?

Answer 1

You could hook to the ItemList-Changed event and select the first item after it is added:

public MyWindow()  
{  
    InitializeComponent();  

    ((INotifyCollectionChanged)ListBox.Items).CollectionChanged +=  
        ListBox_CollectionChanged;  
}  

private void ListBox_CollectionChanged(object sender,   
    NotifyCollectionChangedEventArgs e)  
{  
    if (e.Action == NotifyCollectionChangedAction.Add && ListBox.SelectedItem == null)
    {
        ListBox.SelectedItem = e.NewItems[0];
    }      
}