Delegates in Dynamics 365 for Operations

by | Updated December 29, 2017 | Development, Dynamics 365 for Finance and Operations

Dynamics 365 for Operations is well on its way to making over-layering of code a thing of the past. The application is moving towards and extension model approach. This approach should allow for a faster reaction to provide and push hotfixes and continuous upgrades. One approach Dynamics 365 for Operations is taking to make the application more extensible is the utilization of delegates. By adding these delegates, they are adding the ability for customers and/or partners to add customizations that can be stored in their own package.

A few things to know about x++ Delegates:

• Cannot have modifier. It is always protected.
• Return type must be “Void”
• Defining method cannot contain code
• Subscribing methods must have the same signature as delegate the delegate definition.

Below are a couple delegate examples for Dynamics 365 for Operations.

Create delegate definition

The following code shows an example of a delegate definition:

Create delegate handler

Open the class in the visual studio designer, right click on the delegate definition and click “Copy event handler method” from the menu. This will automatically create the handler method for the delegate.

Copy event handler method

The following code shows example of a handler method.

Full code example

Below I have provided a set of classes that show examples of different ways you can use delegates.

There are three classes:
1. DelegateExamples – Contains delegate definitions
2. DelegateExampleSubscriptions – Contains handler methods
3. DelegateExampleRun – Job that will run and product the output

DelegateExamples

DelegateExampleSubcriptions

Output

Class Runner

To Run:
• Copy all three classes into visual studio.
• Compile
• Right click on the DelegateExampleRun class and set as start up object as shown below.

Right click on the DelegateExampleRun class and set as start up object.

• Then click start in visual studio to run

 

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