Executing function on start up/ on started ArcMap in ArcObjects?

Question

I need execute a function that init a timer when ArcMap application start. My extension class:

namespace GMREAddin.Modules.Toolbar
{
    public sealed class eManager : ESRI.ArcGIS.Desktop.AddIns.Extension
    {
       protected override void OnStartup()
       {
            MessageBox.Show("opened from onstartup.");
            initTimer();
       }
    }
}

And have this attribute in the configuration

When I run the application, it doesn't display the message, and does not start the message.

I am using version 10.4.

Answer 1

According to ArcMap add in constructor called not called on start up it looks like you need to add a 'delayLoad' attribute to your extension and set it to false. Then also keep autoLoad = "true".

I created an empty sample project and tested this code. The config extension looks like this and it seems to work:

<ArcMap>
  <Extensions>
    <Extension id="ArcMapAddin1_Extension1" class="Extension1" delayLoad="false" autoLoad="true" />
  </Extensions>
</ArcMap>

And then I have a MessageBox in the OnStartup() method which appears as soon as ArcStarts.

protected override void OnStartup()
{
   MessageBox.Show("Loaded");
}