View.Ask in action causes the message box to display repeatedly - acumatica

Question

I have the following code to override the "Email Purchase Order" action on the PO entry screen.
The code compiles and the message is displayed, but after selecting Yes Or No the message is displayed again and again until I click the X. Any idea what would cause that?
public delegate IEnumerable NotificationDelegate(PXAdapter adapter, String notificationCD);
[PXOverride]
public IEnumerable Notification(PXAdapter adapter, String notificationCD, NotificationDelegate baseMethod)
{
if(Base.Document.Ask("Are you sure you want to Email the PO?", MessageButtons.YesNo)
!= WebDialogResult.Yes) return adapter.Get();
return baseMethod(adapter, notificationCD);
}
UPDATE:
Here's my latest attempt, that's still not working. The code compiles, but I never get the message box. Added a trace message to confirm it's hitting the code:
public PXAction<POOrder> notification;
[PXUIField(DisplayName = "Notifications", Visible = false)]
[PXButton(ImageKey = PX.Web.UI.Sprite.Main.DataEntryF)]
protected virtual IEnumerable Notification(PXAdapter adapter,
[PXString] string notificationCD)
{
PXTrace.WriteInformation("Reached Notification Action - Notification CD = " + notificationCD + '|');
if (notificationCD == "PURCHASE ORDER")
{
PXTrace.WriteInformation("Notification Action - If reached");
if(Base.Document.Ask("Are you sure you want to Email the PO?", MessageButtons.YesNo)
!= WebDialogResult.Yes) return adapter.Get();
}
return Base.notification.Press(adapter);
}

Answer 1

This happens if the message dialog request is in a place where the framework cant handle a message box.
Try overriding the action itself (21R1):
public PXAction<POOrder> emailPurchaseOrder;
[PXButton(CommitChanges = true)]
[PXUIField(DisplayName = "Email Purchase Order", MapEnableRights = PXCacheRights.Select, MapViewRights = PXCacheRights.Select)]
public virtual IEnumerable EmailPurchaseOrder(
PXAdapter adapter,
[PXString]
string notificationCD = null)
{
if(Base.Document.Ask("Are you sure you want to Email the PO?", MessageButtons.YesNo)
!= WebDialogResult.Yes) return adapter.Get();
return Base.emailPurchaseOrder.Press(adapter);
}
Or for 20R2
public PXAction<POOrder> notification;
[PXUIField(DisplayName = "Notifications", Visible = false)]
[PXButton(ImageKey = PX.Web.UI.Sprite.Main.DataEntryF)]
protected virtual IEnumerable Notification(PXAdapter adapter,
[PXString] string notificationCD)
{
if (notificationCD == "EM")
{
if(Base.Document.Ask("Are you sure you want to Email the PO?", MessageButtons.YesNo)
!= WebDialogResult.Yes) return adapter.Get();
}
return Base.emailPurchaseOrder.Press(adapter);
}