How to avoid _SelectionChanged to be fired?

Question

When pressing a button I select a user control and set ItemsSource to null

   CategoriesListBox.ItemsSource = null;

As soon as this code runs, a SelectionChanged event fires

private void CategoriesListBox_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
{}

-

        <Custom:SurfaceListBox
                x:Name="CategoriesListBox"
                ManipulationDelta="CategoriesListBox_ManipulationDelta"
                IsManipulationEnabled="True"
                SelectionChanged="CategoriesListBox_SelectionChanged"
                ItemTemplate="{DynamicResource CategoriesUnselectedDataTemplate}"
                SelectionMode="Single">
        </Custom:SurfaceListBox>

I need to avoid this and have not the _SelectionChanged fired.

Any idea how to solve this?

I need the SelectionChanged when a user click on that Custom:SurfaceListBox — GibboK, Mar 25 '14 at 07:20
http://stackoverflow.com/questions/8608128/how-to-cancel-a-combobox-selectionchanged-event — Sajeetharan, Mar 25 '14 at 07:23
useful http://social.msdn.microsoft.com/Forums/silverlight/en-US/c2b7b3dc-825c-441a-ada1-cc202892211b/how-to-avoid-the-selectionchanged-event-getting-fired-on-pageload-silverlight?forum=silverlightinstall — GibboK, Mar 25 '14 at 07:23

score 1 · Accepted Answer · edited Mar 25 '14 at 08:41

1

try this ...

private void CategoriesListBox_SelectionChanged(object sender ,System.Windows.Controls.SelectionChangedEventArgs e)
{
    If ( CategoriesListBox.ItemsSource == null)
    {
        some process;
    }
    else
    { 
        some Process;
    }
}

edited Mar 25 '14 at 08:41

Shell

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answered Mar 25 '14 at 08:06

Malar

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It would be worth adding some explanation to you answer. – Tom Fenech Mar 25 '14 at 08:34
If ( CategoriesListBox.ItemsSource == null) { // write the statement which you want to execute when button click } else { //write the statement which you want to execute when user clicks Custom:surfaceListBox} – Malar Mar 25 '14 at 09:17

score 1 · Answer 2 · answered Mar 25 '14 at 18:24

I solved using a similar approach to this source: http://www.amazedsaint.com/2008/06/wpf-combo-box-cancelling-selection.html

private bool handleSelection=true;

private void ComboBox_SelectionChanged(object sender,
                                        SelectionChangedEventArgs e)
        {
            if (handleSelection)
            {
                MessageBoxResult result = MessageBox.Show
                        ("Continue change?", MessageBoxButton.YesNo);
                if (result == MessageBoxResult.No)
                {
                    ComboBox combo = (ComboBox)sender;
                    handleSelection = false;
                    combo.SelectedItem = e.RemovedItems[0];
                    return;
                }
            }
            handleSelection = true;
        }

How to avoid _SelectionChanged to be fired?

2 Answers2