BrowserWindow OnClose event

[AykutToprak]

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How to hide browser window and put application in Tray mode on close button clicked?

I tried as it shown below;

browserWindow.OnClose += () => OnClose(browserWindow);

and OnClose action;

private static void OnClose(BrowserWindow browserWindow)
{
    browserWindow.Hide();
    var menu = new MenuItem[]
    {
        new MenuItem
        {
            Label = "Show",
            Click = () =>
            {
                Electron.Tray.Destroy();
                browserWindow.Show();
            }
        },
        new MenuItem
        {
            Label = "Quit",
            Click = () => Electron.App.Quit()
        }
    };

    Electron.Tray.Show("favicon.ico", menu);
    Electron.Tray.SetToolTip("Electron Demo in the tray.");
}

[GregorBiswanger]

please see how to do this in native electron and try our API:
https://www.likeanswer.com/question/19825

Please let me know if everything worked out for you.

[AykutToprak]

Using browserWindow in OnClose event give error as it can be seen in above image.
In my opinion the difference between native code is event.preventDefault(); of onClose event.

browserWindow has been already closed in OnClose event so that it give error.

[GregorBiswanger]

I built you a sample. You have to put a script in your window (HTML) when the window is closed. You prevent the app from closing and inform your code via IPC. There you create a system tray and hide the window.

Could that help you?

The script in your MainWindow (html):

<script>
const { ipcRenderer } = require("electron");

window.onbeforeunload = (e) => {
    e.returnValue = true;
    ipcRenderer.send("hideToSystemTray");
};
</script>

The code in startup.cs:

Task.Run(async () =>
{
    var mainWindow = await Electron.WindowManager.CreateWindowAsync();

    Electron.IpcMain.On("hideToSystemTray", (e) =>
    {
        mainWindow.Hide();

        if (Electron.Tray.MenuItems.Count == 0)
        {
            var menu = new MenuItem[]
            {
                new MenuItem
                {
                    Label = "Show Window",
                    Click = () => mainWindow.Show()
                },
                new MenuItem
                {
                    Label = "Exit",
                    Click = () => Electron.App.Exit()
                }
            };

            Electron.Tray.Show(@"..\bin\wwwroot\images\electron.png", menu);
            Electron.Tray.SetToolTip("Electron.NET Demo in the tray.");
        }
    });
});

[AykutToprak]

Thank you @GregorBiswanger .

It solved the problem.

[ruohki]

To piggyback on this problem.

In js you can do something like this in your app.js

    mainWindow.on('close', (event) => {
      if(!shouldQuit){
        event.returnValue = true;
        event.preventDefault()
        mainWindow.hide();
      } else {
        // close app
      }
    });

I noticed the OnClose do not hand over any arguments to do the same in c#. Is this a missing feature?