prevent wpf listview header double click autosizes column

Question

I have a listview where I have templated the column headers and the listview items are templated also. However I have different tempalates for some of the rows in the grid

Answer 1

Yes, set up a double-click handler on the ListView itself. Then in the handler, use code like this:

private void ListView_MouseDoubleClick(object sender, MouseButtonEventArgs e)
{
    if (TryFindParent<GridViewColumnHeader>(e.OriginalSource as DependencyObject) != null)
        e.Handled = true;
}

Where TryFindParent is defined as:

public static T TryFindParent<T>(DependencyObject current) where T : class
{
    DependencyObject parent = VisualTreeHelper.GetParent(current);

    if (parent == null) return null;

    if (parent is T) return parent as T;
    else return TryFindParent<T>(parent);
}

Answer 2

I found working solution after digging in GridViewColumnHeader source code. My XAML for ListView with columns is:

                            <ListView.View>
                                <GridView AllowsColumnReorder="False" x:Name="ListGridView">
                                    <GridView.Columns>

                                        <GridViewColumn x:Name="ExpandHeader"
                                                        Width="40">
                                            <GridViewColumn.Header>
                                                <GridViewColumnHeader IsHitTestVisible="False" />
                                            </GridViewColumn.Header>
                                        </GridViewColumn>

And you need to put code like this in your View's Loaded event (when columns are created):

    private void ViewOnLoaded(object sender, RoutedEventArgs e)
    {
        var fields = typeof(GridViewColumnHeader).GetFields(BindingFlags.NonPublic | BindingFlags.Instance);
        var thumbFieldInfo = fields.FirstOrDefault(fi => fi.FieldType == typeof(Thumb));
        var methods = typeof(GridViewColumnHeader).GetMethods(BindingFlags.NonPublic | BindingFlags.Instance);
        var eventHandlerMethodInfo = methods.FirstOrDefault(mi => mi.Name == "OnGripperDoubleClicked");

        if (thumbFieldInfo != null && eventHandlerMethodInfo != null)
        {
            foreach (var column in ListGridView.Columns)
            {
                var header = column.Header as GridViewColumnHeader;
                if (header != null)
                {
                    var headerGripper = thumbFieldInfo.GetValue(header) as Thumb;
                    if (headerGripper != null)
                    {
                        var handler = Delegate.CreateDelegate(typeof(MouseButtonEventHandler), header, eventHandlerMethodInfo);
                        headerGripper.RemoveHandler(Control.MouseDoubleClickEvent, handler);
                    }
                }
            }
        }
    }