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Creating APIs in Business Central - 1

Introduction:
While writing a blog on Automated Testing in Business Central, I was going through sample apps provided by Microsoft and realized that the complexity is nowhere close to what examples Microsoft has provided on docs.microsoft.com. In this blog, I will try to explain how APIs work and how to be creative with the implementation. Also, an API which were in beta are finally out with version V1.0 in the April 2019 release let's see some important key things from development aspects.
This blog is going to be theoretical one kindly bear with me.


Pre-requisites:
Microsoft Dynamics Business Central (SaaS)VS Code(https://code.visualstudio.com/download)AL Language Extension(https://tinyurl.com/yyvzxwkb)API V1 from Business Central On-Premise DVD
Books & References:
API V1 from Business Central On-Premise DVDAPI(V1.0) for Business Central (Click Here)API(Beta) for Business Central (Click Here)
Solution:

Key Requirements:
API source table must have an Id(GUID) field per record for m…

Enum Object in Business Central - How to create and how to extend!

Introduction:
Since the dawn of Business Central Era (2nd April 2018 - Today), there are many new data types introduced by Microsoft.
One such data type is Enum(Enumeration). Essentially, what enumeration is having a single select value with multiple options at a given time!
Well, I know what your thinking what about the 'Option' data type.
Anyways, enough of talking let's just dive in!

Disclaimer:The knowledge in this blog is true and complete to the best of authors and publishers knowledge. The author and publisher disclaim any liability in connection with the use of this information.
Pre-requisites:
Microsoft Dynamics Business Central (SaaS or On-Premise)
VS code with AL Language extension

Code:
1. Enum as an Object:
Just like Tables and Pages, Enum behaves like an Object.
Note that Extensible means that the Enum Object can be extended in another module. By default, this property is set to TRUE.



Enums and Enum Extensions behave differently. They follow a different number se…

Understanding and How to use APIs Business Central - 2

Introduction:
In my last blog post (Business Central API -1 ) on Creating API in Business Central, we discussed all the commonly used properties of the page, query, and controls like field and data-item. In today's blog, we will be diving deeply into the validation of the data passed through the API endpoint, how it enters into the source tables and is manipulated to be inserted/modified into single or multiple tables.
Also, I will be demonstrating how APIs are to be used.

Pre-requisites:
Microsoft Dynamics Business Central (SaaS)VS Code(https://code.visualstudio.com/download)AL Language Extension(https://tinyurl.com/yyvzxwkb)API V1 from Business Central On-Premise DVD
Books & References:
API V1 from Business Central On-Premise DVDAPI(V1.0) for Business Central (Click Here)API(Beta) for Business Central (Click Here)
Theory:
Understanding API in Business Central 1. BINDSUBSCRIPTIONS: Use to trigger IntegrationEvent for the Codeunit stated in parameters whenever the function calling BI…