How to close the MauiCommunityToolkit Popup from Viewmodel

Question

I want close a CommunityToolkit Popup in my Viewmodel. I tried using a WeakReferenceMessenger to receive a message like this:

        public mypopup()
    {
        InitializeComponent();
        WeakReferenceMessenger.Default.Register<string, string>(this, "popup", (r, d) =>
        {
            Debug.WriteLine(message: "received message");
            if (d == "close")
            {
                WeakReferenceMessenger.Default.Unregister<string>(this);
                MainThread.BeginInvokeOnMainThread(() => { this.Close(); });
            }
        });
    }

And somewhere else I use this to send a message

WeakReferenceMessenger.Default.Send<string, string>("close", "popup");

The 1st call works. And the SECOND time it will raise a System.NullReferenceException in MauiPopup.windows.cs Function void CleanUp() Target.ContextFlyout = null;

I also tried like this in message receive:

MainThread.BeginInvokeOnMainThread(() => { this.Close(); });

the same happens. I wonder if there is a solution or a better way to close popup from somewhere else without transferring the handle of popup.

ou of curiosity why don't you close it from the code behind of the contentpage that opened it in the first place ? — Cfun, Sep 24 '22 at 15:57
@ss1969 you expect to close the popup from the popup viewmodel? if this is not the case, why you want to close a popup from another viewmodel? if you Expect some result to close, first you should get that result and then you open or not the popup — Leandro Toloza, Sep 27 '22 at 11:54

score 3 · Accepted Answer · answered Dec 05 '22 at 00:33

3

I did this in my code

        PopupPage p = new PopupPage();
        Application.Current.MainPage.ShowPopup(p);
        await new TaskFactory().StartNew(() => { Thread.Sleep(5000); });
        p.Close();

answered Dec 05 '22 at 00:33

Orion77

92
9

How to close the MauiCommunityToolkit Popup from Viewmodel

1 Answers1