C# Toolbar button not working on click

[Anonymous]

I been working on a C# addin for Inventor 2019. This addin creates a toolbar, which works, that has a single button. After registering a handler to the button, nothing happens when I click the button. Interestingly if I manually execute the button, that does what it should.

Note that I have generalized the code to remove certain information (ex. ClassToOpen is not the actual class name).

Any help is greatly appreciated, thanks.

public void Activate(ApplicationAddInSite addInSiteObject, bool firstTime) {
// General addin stuff
Application Inventor = addInSiteObject.Application;
var guid = $"{{{GuidAttribute.Value}}}"; // This is the GUID that is on the addin server attribute

// Button creation
ButtonDefinition command0 = Inventor.CommandManager.ControlDefinitions.AddButtonDefinition("Button 1", nameof(ClassToOpen), CommandTypesEnum.kFilePropertyEditCmdType, guid, "Display dialog", "Display dialog", PictureConverter.GetPicture(Properties.Resources.toolbar_buttons_16x16), PictureConverter.GetPicture(Properties.Resources.toolbar_buttons_24x24));

Command0_EventHandler = new ButtonDefinitionSink_OnExecuteEventHandler(Command0_OnExecute);
command0.OnExecute += Command0_EventHandler;

// This works, but clicking the button does not
command0.Execute();
}

private void Command0_OnExecute(NameValueMap Context) => ClassToOpen.OpenDialog();
        private ButtonDefinitionSink_OnExecuteEventHandler Command0_EventHandler;

[bradeneuropeArthur · Accepted solution]

Where have you declared the CommandButton?

[Anonymous]

Aha! That was it, thank you.

Updated command0 from my sample to be a private class variable and all is well.

[bradeneuropeArthur]

Sometimes things are easy sometimes not.

Good luck further!

@Anonymous