.NET6 NotifyIcon ContextMenu 不会显示

Question

所以我在 .NET 6 中构建了一个应用程序，我能够让它在托盘区域显示NotifyIcon ，但是 NotifyIcon 上的上下文菜单（右键单击）不会显示。

我在Implement a menu on tray icon for .NET 5/6 win forms之后构建了这段代码（然后更改它，以便它不使用内联创建来查看它是否导致了这个问题）

所以我唯一能想到的是我的应用程序没有表单，所以我从 Program.cs 文件运行这段代码。

internal class Program
{
    private static NotifyIcon notifyIcon;
    private static ContextMenuStrip cms;

    private static async Task Main(string[] args)
    {
        notifyIcon = new NotifyIcon();
        notifyIcon.Icon = new Icon("Assets/icon.ico");
        notifyIcon.Text = "Notify";

        cms = new ContextMenuStrip();

        cms.Items.Add(new ToolStripMenuItem("Reconnect", null, new EventHandler(Reconnect_Click)));
        cms.Items.Add(new ToolStripSeparator());
        cms.Items.Add(new ToolStripMenuItem("Quit", null, new EventHandler(Quit_Click), "Quit"));

        notifyIcon.ContextMenuStrip = cms;
        notifyIcon.Visible = true;

        new Thread(() =>
        {
            while (true)
            {
                Thread.Sleep(10000);
                // do application background task
            }
        }).Start();
    }

    protected static void Reconnect_Click(object? sender, System.EventArgs e)
    {
        // do something
    }

    protected static void Quit_Click(object? sender, System.EventArgs e)
    {
        Environment.Exit(0);
    }
}

更新了 ContextMenuStrip 实例以针对未在主上下文/作用域中构建的 class 进行保存

Answer 1

您需要有一个消息循环来处理 Windows 消息，这些消息在 Windows 应用程序中使用，以便在操作系统和应用程序的用户界面之间进行通信。

如果您想要一个没有可见表单但仍运行消息循环的应用程序，请使用Application.Run方法和ApplicationContext object。然后您还可以使用上下文来表示应用程序结束。

示例代码：

internal static class Program
{
    private static NotifyIcon notifyIcon;
    private static ContextMenuStrip cms;
    private static ApplicationContext context;

    [STAThread]
    static void Main()
    {
        ApplicationConfiguration.Initialize();

        notifyIcon = new NotifyIcon();
        notifyIcon.Icon = new Icon("Assets/icon.ico");
        notifyIcon.Text = "Notify";

        cms = new ContextMenuStrip();

        cms.Items.Add(new ToolStripMenuItem("Reconnect", null, new EventHandler(Reconnect_Click)));
        cms.Items.Add(new ToolStripSeparator());
        cms.Items.Add(new ToolStripMenuItem("Quit", null, new EventHandler(Quit_Click), "Quit"));

        notifyIcon.ContextMenuStrip = cms;
        notifyIcon.Visible = true;

        // Create an ApplicationContext and run a message loop
        // on the context.
        context = new ApplicationContext();
        Application.Run(context);

        // Hide notify icon on quit
        notifyIcon.Visible = false;
    }

    static void Reconnect_Click(object? sender, System.EventArgs e)
    {
        MessageBox.Show("Hello World!");
    }

    static void Quit_Click(object? sender, System.EventArgs e)
    {
        // End application though ApplicationContext
        context.ExitThread();
    }
}