topic Re: Add-in OnLoad fails to execute when opening MXD from command line in ArcObjects SDK Questions

Add-in OnLoad fails to execute when opening MXD from command line

jgers — Sun, 02 Feb 2014 23:16:30 GMT

OnLoad is supposed to be called when opening a document with a persisted stream. But, when I try loading the MXD from the command line (ie. arcmap.exe somemapdoc.mxd), OnLoad never executes in my Add-in. Is there a work around for this issue?

Re: Add-in OnLoad fails to execute when opening MXD from command line

DuncanHornby — Mon, 03 Feb 2014 18:17:32 GMT

OK obvious first question to ask: does the addin extension onLoad run when you open ArcMap and then your MXD?

Re: Add-in OnLoad fails to execute when opening MXD from command line

RichardWatson — Mon, 03 Feb 2014 18:26:36 GMT

Did your add-in previously save information in this map document?

In other words was OnSave called and you added data and then saved the mxd?

I have not used this before for add-ins but have some experience with classic IExtension objects.

Re: Add-in OnLoad fails to execute when opening MXD from command line

jgers — Mon, 03 Feb 2014 21:42:07 GMT

OK obvious first question to ask: does the addin extension onLoad run when you open ArcMap and then your MXD?

Yes, OnLoad does run if you open the mxd that way.

Re: Add-in OnLoad fails to execute when opening MXD from command line

jgers — Mon, 03 Feb 2014 21:47:11 GMT

Did your add-in previously save information in this map document?

In other words was OnSave called and you added data and then saved the mxd?

I have not used this before for add-ins but have some experience with classic IExtension objects.

Yes, the data is saved into the mxd with OnSave. I am able to read it back(OnLoad executes) if I load the mxd from an already open session of ArcMap. This issue only occurs if the mxd is loaded through the command line.

Re: Add-in OnLoad fails to execute when opening MXD from command line

RichardWatson — Tue, 04 Feb 2014 14:23:24 GMT

Did you do this?

http://resources.arcgis.com/en/help/arcobjects-net/conceptualhelp/index.html#/Advanced_add_in_concepts/0001000004n7000000/

Delay loading

By default, the assemblies associated with add-in buttons and tools are not loaded until the corresponding item on a toolbar or menu is clicked by the user. This behavior helps conserve application memory and other resources. Since the enabled state of an add-in button or tool is controlled by the OnUpdate method within code, the button or tool will initially appear enabled. If you need tighter control over the initial enabled state of a button or tool, you need to override the default behavior and force the item to load at startup by setting the onDemand Extensible Markup Language (XML) attribute to false.

Re: Add-in OnLoad fails to execute when opening MXD from command line

jgers — Tue, 04 Feb 2014 18:59:23 GMT

That doesn't help because it's for Add-in buttons and tools.

Re: Add-in OnLoad fails to execute when opening MXD from command line

LeoDonahue — Tue, 04 Feb 2014 20:28:50 GMT

Ok, what kind of Add-in do you have?

Re: Add-in OnLoad fails to execute when opening MXD from command line

jgers — Wed, 05 Feb 2014 01:36:55 GMT

I am beginning to think this is a bug.

Re: Add-in OnLoad fails to execute when opening MXD from command line

ErinBrimhall — Wed, 05 Feb 2014 17:56:44 GMT

This may or may not be related... but I've seen issues with Add-ins loading and events firing when ArcMap is launched through some indirect means (e.g. by another application, by command prompt, etc.). It boiled down to security constraints defined in local and domain group policies.

It's not clear if yours is the same kind problem, but just thought I'd throw this info out there in case it can get you looking in the right area.

Re: Add-in OnLoad fails to execute when opening MXD from command line

jgers — Wed, 05 Feb 2014 19:10:03 GMT

I forgot to mention that this also occurs through shell execute. ie. double click the mxd to launch ArcMap.

Re: Add-in OnLoad fails to execute when opening MXD from command line

DaveFullerton — Mon, 21 Jul 2014 19:00:49 GMT

I had problems with OnLoad not executing when double clicking the mxd. Then I went to the config file and set the autoLoad attribute to true on the Extension element (default is false). I also found this was the case in ESRI's sample solution, but it is not mentioned anywhere when you view the sample code in the browser. There are a couple of bugs in the sample code as well (null references - really?).