wpf 隐藏菜单栏

要隐藏WPF应用程序的菜单栏，可以使用以下两种方法之一：

1. 在Window的XAML中设置WindowStyle属性为None，这将导致窗口没有边框和标题栏，从而隐藏菜单栏。示例代码如下：

   <Window x:Class="WpfApp1.MainWindow"
           xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
           xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
           Title="MainWindow" Height="450" Width="800"
           WindowStyle="None">
       <!-- Window content here -->
   </Window>

2. 在Window的Loaded事件处理程序中使用Win32 API来隐藏菜单栏。示例代码如下：

   using System.Runtime.InteropServices;
   using System.Windows;
   
   namespace WpfApp1
   {
       public partial class MainWindow : Window
       {
           [DllImport("user32.dll")]
           private static extern int GetWindowLong(IntPtr hWnd, int nIndex);
   
           [DllImport("user32.dll")]
           private static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
   
           private const int GWL_STYLE = -16;
           private const int WS_SYSMENU = 0x80000;
   
           public MainWindow()
           {
               InitializeComponent();
               Loaded += MainWindow_Loaded;
           }
   
           private void MainWindow_Loaded(object sender, RoutedEventArgs e)
           {
               // Hide the system menu (which includes the menu bar) of the window
               IntPtr hwnd = new System.Windows.Interop.WindowInteropHelper(this).Handle;
               int style = GetWindowLong(hwnd, GWL_STYLE);
               SetWindowLong(hwnd, GWL_STYLE, style & ~WS_SYSMENU);
           }
       }
   }

这两种方法都可以隐藏菜单栏，但第二种方法可以保留窗口的边框和标题栏。