WPF-TreeView行选中效果

        private void trvw_MouseDown(object sender, MouseButtonEventArgs e)
        {
            if (e.Source is TreeViewItem treeViewItem)
            {
                if (e.RightButton == MouseButtonState.Pressed || e.LeftButton == MouseButtonState.Pressed)
                {
                    treeViewItem.IsSelected = true;
                }
            }
        }