Question

我创建了一个WPF窗口并将其Window Style属性设置为'None'。然而，当我按 Alt + Up Key 组合时，窗口左上角会出现一个上下文菜单。

有没有办法禁用它..

注意：处理PreviewKeyDown事件可以完成工作，但我正在寻找不同的方法。

   <Window

    x:Class="WpfApplication14.MainWindow"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    WindowStyle="None"

    Title="MainWindow" Height="350" Width="525">

      <Grid/>

    </Window>

Answer 1

在代码后面添加以下代码会清除标题样式栏并阻止系统菜单：

    private const int GWL_STYLE = -16; //WPF's Message code for Title Bar's Style 
    private const int WS_SYSMENU = 0x80000; //WPF's Message code for System Menu
    [DllImport("user32.dll", SetLastError = true)]
    private static extern int GetWindowLong(IntPtr hWnd, int nIndex);
    [DllImport("user32.dll")]
    private static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);

    // Handling the Messages in Window's Loaded event

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        var hwnd = new WindowInteropHelper(this).Handle;
        SetWindowLong(hwnd, GWL_STYLE, GetWindowLong(hwnd, GWL_STYLE) & ~WS_SYSMENU);
    }

取自： How to hide close button in WPF window?

Answer 2

我认为您必须使用 Alt + Space 来显示系统菜单，而不是 Alt + Up ：）

参见本文，它介绍了如何删除WPF的系统菜单： http://winsharp93.wordpress.com/2009/07/21/wpf-hide-the-window-buttons-minimize-restore-and-close-and-the-icon-of-a-window/

Answer 3

在我的情况下，我想保留图标，但我也登陆这里，所以如果你只想禁用系统菜单激活（并保持图标），你可以挂钩WMProc并压制它。我的解决方案将使事件处理不受影响。

/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();

        KeyUp += MainWindow_KeyUp;
    }

    protected override void OnKeyUp(KeyEventArgs e)
    {
        Log("KeyUp overridde: {0}", e.Key);
        base.OnKeyUp(e);
    }

    private void MainWindow_KeyUp(object sender, KeyEventArgs e)
    {
        Log("KeyUp event: {0}", e.Key);
    }


    private const int WM_SYSCOMMAND = 0x0112;
    private const int SC_KEYMENU = 0xF100;
    private const int NO_KEYPRESS = 0;
    protected override void OnSourceInitialized(EventArgs e)
    {
        base.OnSourceInitialized(e);

        HwndSource source = PresentationSource.FromVisual(this) as HwndSource;
        source.AddHook(this.WndProc);
    }

    private void Log(string msg, params object[] args)
    {
        Debugger.Log(0, string.Empty, string.Format(msg, args));
    }

    private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
    {
        // Handle messages...

        if (msg == WM_SYSCOMMAND)
        {
            if (wParam.ToInt32() == SC_KEYMENU)
            {
                int iLParam = lParam.ToInt32();

                Log($"Key: {(char)iLParam} ");

                if (lParam.ToInt32() == NO_KEYPRESS)
                {
                    handled = true;
                }
            }
        }

        return IntPtr.Zero;
    }
}

在WPF窗口中完全删除标题栏上下文菜单

3 个答案: