隱藏拖動把手：

設置ToolBar屬性 ToolBarTray.IsLocked="True"，可以達到隱藏拖動把手的目的

private void ToolBar_Loaded(object sender, RoutedEventArgs e)
{
    //去掉ToolBar右邊默認的擴展圖標
    ToolBar toolBar = sender as ToolBar;

    var overflowGrid = toolBar.Template.FindName("OverflowGrid", toolBar) as             FrameworkElement;

    if (overflowGrid != null)
    {
    overflowGrid.Visibility = Visibility.Collapsed;
    }
    var mainPanelBorder = toolBar.Template.FindName("MainPanelBorder", toolBar)     as FrameworkElement;

    if (mainPanelBorder != null)
    {
    mainPanelBorder.Margin = new Thickness(0);
    }
}    

　　<ToolBar x:Name="tbStuRelay" Width="120" ToolBarTray.IsLocked="True" Background="#008ede" HorizontalAlignment="Stretch" VerticalAlignment="Center" VerticalContentAlignment="Center" Loaded="ToolBar_Loaded" MouseMove="ToolBar_MouseMove" Visibility="Collapsed">

</ToolBar>

WPF樣式學習：ToolBar的使用