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Старый 15.11.2020, 15:11   #1  
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vanvugt: How-to: Create Notifications – Steps to Take
Источник: https://dynamicsuser.net/nav/b/vanvu...-steps-to-take
==============

In a recent VSCode/AL update training the topic notifications, as part of SaaSifying your solution, was tackled. After a short introduction of what these notifications (functionally) are about I explained and demoed how to develop them. Inviting the attendees thereafter to pose their questions, one of them, a seasoned C/SIDE developer whom I will call Bogdan, marked that he had been implementing them a couple of times and still had issues with the different parts that have to be developed. He asked: "Could you give me a clear overview on what steps I have to take?"

It was special to experience how this resonated i me as that was exactly what I ran into when preparing this part of the training. Notifications as a functional feature are efficient, simple and powerful. To code them isn't surely rocket science, but to have a clear overview what is needed and how it can be structured can indeed be somewhat muddy. Triggered by Bogdan's question I came up with the following steps:

  1. Create method NotificationId
  2. Create sender method
  3. Create recaller method
  4. Create method with send-or-recall logic
  5. Trigger send-or-recall method in event subscribers to relevant publishers
Let me elaborate on these steps by means of an example taken from Daniel Rimmelzwaan's video Develop SAAS user experiences for Dynamics 365 Business Central.

1.Create method NotificationId

Each notification should a unique id being a Guid. For reusibility ease of use you need to create a function that will allow you to assign and retrieve this id.

localprocedure NotificationId(): Guid;
begin
exit('fab25372-5716-4fad-b6ee-20c6d0f5105c');
end;
Note that you have to fill in your own, unique Guid.

2.Create sender method

The code part that sets up your notification is called the sender. This is how it could look like:

localprocedure SendCompanyInfoMissingNotification()
var
CompanyInfoMissingNotification: Notification;
begin
CompanyInfoMissingNotification.ID := NotificationId();
CompanyInfoMissingNotification.Message := CompanyInfoMissingNotificationMsg;
CompanyInfoMissingNotification.Scope := NotificationScope::LocalScope;
CompanyInfoMissingNotification.AddAction(OpenCompanyInfoTxt, Codeunit::"Notication Company Info", 'ShowCompanyInfomationWizard');
CompanyInfoMissingNotification.Send();
end;
3.Create recaller method

Each sender should in general be accompanied by a recaller:

localprocedure RecallCompanyInfoMissingNotification()
var
CompanyInfoMissingNotification: Notification;
begin
CompanyInfoMissingNotification.ID := NotificationId();
CompanyInfoMissingNotification.Recall();
end;
4.Create method with send-or-recall logic

Given sender and recaller we can now build the send-or-recall logic that will define whether a notification should be sent or recalled.

localprocedure SendOrRecallCompanyInfoMissingNotification()
var
CompanyInfo: Record "Company Information";
begin
CompanyInfo.Get();
if (CompanyInfo.Name = '') or (CompanyInfo."E-Mail" = '') then
SendCompanyInfoMissingNotification()
else
RecallCompanyInfoMissingNotification();
end;
5.Trigger send-or-recall method in event subscribers to relevant publishers

Eventually, now having all logic in place to create a notification and determine to get it shown, the last part we need to setup is when it shouild be triggered.

[EventSubscriber(ObjectType::Page, Page::"Sales Order", 'OnAfterGetCurrRecordEvent', '', false, false)]
localprocedure CompanyInfoMissingNotifOnAfterGetCurrRecordEvent(var Rec: Record "Sales Header")
begin
SendOrRecallCompanyInfoMissingNotification();
end;
Hope this makes sense and can be of help.




Источник: https://dynamicsuser.net/nav/b/vanvu...-steps-to-take
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