Outlook add in (calendar event): Recurrence is always null

Question

I have an Outlook addin for calendar events, with a task pane. From the pane, I get the event data:

   date start: item.start.getAsync()
   date end: item.end         


        

Answer 1

With my test taskpane.js I did this test:

1. Create a 'New event'

2. Change the recurrence ('daily')

3. Open the taskpane and read the recurrence in the 'Office.onReady()' method g_item.recurrence.getAsync --> Recurrence: valid value ('daily') // OK!

4. Close the taskpane

5. Open the taskpane and read the recurrence in the 'Office.onReady()' method g_item.recurrence.getAsync --> Recurrence: valid value ('daily') // OK!

6. Close the taskpane

7. Change the recurrence (to 'weekly')

8. Open the taskpane and read the recurrence in the 'Office.onReady()' method g_item.recurrence.getAsync --> Recurrence: previous value ('daily') // ERROR!

*** If 'no recurrence' when taskpane 1st open, close taskpane, change recurrence (to any) and open taskpane again --> Recurrence: null

My 'onReady' method:

Office.onReady(info => {
     g_item = Office.context.mailbox.item;
      if (!g_item.itemId) {
         g_item.saveAsync(function (result) {
              g_item.recurrence.getAsync((asyncResult) => {
                  if (asyncResult.status !== Office.AsyncResultStatus.Failed)
                      console.log("Recurrence: " + JSON.stringify(asyncResult.value));
              });
          });
      }
});

---

I add a sync handler and a button. In the 'onReady' method:

Office.context.mailbox.item.addHandlerAsync(Office.EventType.RecurrenceChanged, handler);
document.getElementById("button").onclick = onClick;

with the taskpane open:

1. Change recurrence from 'daily' to 'weekly' and Change event subject --> Recurrence handler is called TWICE: a) OLD recurrence value ('daily') // ERROR? b) NEW value ('weekly') // OK!

   My handler method:

    function handler(eventarg) {
        console.log("handler. recurrence: " + JSON.stringify(eventarg.recurrence));
    }
   

2. Press my button. Recurrence trace has the OLD value ('daily'), but subject trace has the NEW value (like the other values from the item but the recurrence...)

    function onClick() {
       g_item.recurrence.getAsync((result) => {
           // Recurrence: previous value ('daily')   ERROR!
           if (result.status === Office.AsyncResultStatus.Succeeded)
              console.log("onClick. Recurrence: " + JSON.stringify(result.value));     
       });
   
       g_item.subject.getAsync((result) => {
          // Subject: ALWAYS printed properly when changed!!! 
          if (result.status === Office.AsyncResultStatus.Succeeded)
               console.log("onClick. Subject: " + JSON.stringify(result.value));
       });
    }
   

*** If recurrence is selected and then taskpane is open, onClick method read the value properly.