Store global reference to a service/object

Question

In developing with ArcMap, is there any way to register a service that can be used during the life-cycle of a document- for example to do something like:

C# .NET

mxApplication.RegisterService(myWebService); 

then later-

mxApplication.GetService<WebService>().SaySomething("Hi");

So kind of using the Service Locator pattern or similar.

Answer 1

Typically in AO you would use an extension to manage state and listen for the OpenDocument, CloseDocument, etc. events. See the Extension to listen to document open and save events sample for example.

If you need to persist data in the map document itself, see the How to persist data in a document sample.