CODEWITHSUNDEEP
c#wpfmultithreading
JWiley
JWiley

Reputation: 3219

Close window from constructor for a given criteria

I have a constructor for my ViewModel given like so:

    [ImportingConstructor]
    public MyViewModel(IMyViewModel view)
        : base(view)
    {
         if (tester.TestConnection(port, ref _errorMessages))
        {
            MethodThatBeginsAsync();
        }
        else
        {
            MessageBox.Show("Could not connect: " + _errorMessages);
            _abortCommand.Execute(null);
        }
    }

I get an error message of CompositionException when trying to close the corresponding window if the check fails; how can I close the window before it opens?

I.e. the equivalent of:

_dialogResult = false;
ViewCore.close();

Upvotes: 0

Views: 1027

Answers (1)

Greg D
Greg D

Reputation: 44096

"how can I close the window before it opens?"

Don't open it.

You don't have enough context here to provide a better answer than that. What window are you trying to close? What's the message box's parent window? What line throws a CompositionException?

(Note that displaying a messagebox directly from a ViewModel is already a pretty questionable practice, akin (imo) to displaying message boxes from a library that displays no other UI.)

Upvotes: 1

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