How do I prevent Visual Studio from firing events on the designer?

Question

I've got a user control which is supposed to fire an event when the visibility or the enable status changes.

My problem is the events fire on Visual Studio's designer too, which is irritating since during design they act in an unexpected behaviour.

How can I prevent that?

did u chk https://stackoverflow.com/questions/3901220/winforms-why-do-events-fire-at-design-time — Daniel B, Oct 21 '17 at 15:53
Possible duplicate of [Winforms: Why do events fire at design-time?](https://stackoverflow.com/questions/3901220/winforms-why-do-events-fire-at-design-time) — Daniel B, Oct 21 '17 at 16:04
Does [DesignMode with Controls](https://stackoverflow.com/q/34664) help? E.g. I like [this answer](https://stackoverflow.com/a/35041620). — dbc, Oct 21 '17 at 17:00

score 1 · Answer 1 · answered Oct 21 '17 at 14:40

1

Add this property to your (base) class and check its value in the RaiseEventXYZ or FireEventXYZ methods...

public class MyClass
{
    public bool IsDesignMode { get;private set; }
    public MyClass()
    {
        IsDesignMode = LicenseManager.UsageMode == LicenseUsageMode.Designtime;
    }
}

answered Oct 21 '17 at 14:40

Michael

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Doesn't work in VS 2022, and most likely not in VS2019 and 2017 – Martin Kirk Apr 27 '22 at 11:11

How do I prevent Visual Studio from firing events on the designer?

1 Answers1