WPF HandleListBoxClickEvent works only on the empty space of the list

Question

Why HandleListBoxClickEvent works only on the empty space of the list? The problem is when I want to refresh the list. While clicking on some item - nothing is updating. But clicking on the empty space of the list (when some item is selected) - selected item is updating.

I think, that some problem should be in xaml, because I was following a ready (working) example with the c# code.

Resources:

ViewModel:

internal class OrderEntryViewModel : ViewModelBase, IParentViewModel, IViewModelBase
{
...
public void HandleListBoxClickEvent()
    {
        if (this._selectedOrder != null)
        {
            if (this._selectedOrder.IsNew)
            {
                if (this._qty != "")
                {
                    this._selectedOrder.Quantity = int.Parse(this._qty);
                    this.SelectedQuantity = "";
                    this.CalculateTotal();
                }
            }
        }
}
...
}

xaml.cs:

public partial class OrderEntryView : System.Windows.Controls.UserControl
{
    private bool isExpended = true;

    public OrderEntryView()
    {
        this.InitializeComponent();
    }

    private void LstTicket_MouseDown(object sender, MouseButtonEventArgs e)
    {
        ((OrderEntryViewModel)base.DataContext).HandleListBoxClickEvent();
    }

    private void UserControl_Loaded(object sender, RoutedEventArgs e)
    {
    }
}

xaml list:

Peter Duniho · Accepted Answer

Without a good, minimal, complete code example that clearly illustrates the question, it's not practical to try to provide a working code example.

But I can tell you what the basic issue is: when the user clicks in an actual item in your ListBox, the item itself handles the user input.

You can either preview the mouse event (see e.g. Mouse.PreviewMouseDown Attached Event, paying close attention to the documented caveats), or you can handle the MouseDown event in the list item itself. See e.g. How can I get an event or command to fire when the user clicks on a ListViewItem? for some more information regarding that.

WPF HandleListBoxClickEvent works only on the empty space of the list

Answers (1)

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