Three Required Lifecycle Methods for PCF Component Development | PL-400 Exam

Implementing Lifecycle Methods in PCF Components

Prev Question Next Question

Question

You create a new PCF component.

Please select the three required lifecycle methods that you should implement in your component.

Answers

Explanations

Click on the arrows to vote for the correct answer

A. B. C. D. E. F.

Correct Answer: D

Power Apps provides the Client API model for model-driven apps for users to implement in their business logic.

The Client API model includes objects and methods that developers can access using Javascript code.

There are four root objects of the Client API model: executionContext - this is an execution object of the model-driven app.

It gives access to the context of the forms and grids.

formContext - provides access to the form object using the executionContext.

gridContext - provides access to the grid (subgrid) on a form.

Xrm - provides access to the global object for operations that do not directly impact UI and data in forms, grids, controls.

The Xrm.WebAPI object uses Web API for the Dataverse data access.

It has two properties: online and offline.A list of methods includes the record operations, a retrieval of the multiple records, and execution of the single or multiple actions, functions, or CRUD operations.

To retrieve multiple records from the Dataverse contact table, you use the retrieveMultipleRecords method, like in the following statement:

parent.Xrm.WebApi. retrieveMultipleRecords("contact",'"?$select=fullname, emailaddressi&$top=3").then( function success(result) { for (var i = 0; i < result.entities. length; i++) { alert(result.entities [i].fullname) ; // perform additional operations on retrieved records

All other options are incorrect.

For more information about model-driven app's Client API scripts using WebAPI, please visit the below URLs:

When creating a new PowerApps Component Framework (PCF) component, there are several lifecycle methods that need to be implemented. These lifecycle methods are called at different stages of the component's lifecycle and allow the component to interact with the PowerApps runtime environment.

The three required lifecycle methods that you should implement in your component are:

  1. Init: This method is called once when the component is first initialized and allows you to perform any initial setup or configuration that the component requires. For example, you might use this method to set up any event listeners or initialize any state variables that the component needs.

  2. updateView: This method is called whenever the component needs to update its display. This can happen as a result of user interaction, changes to the underlying data, or other factors. You should use this method to update the component's DOM elements to reflect the current state of the component.

  3. Destroy: This method is called when the component is about to be destroyed and allows you to perform any cleanup or teardown that the component requires. For example, you might use this method to remove any event listeners or other resources that the component has created.

While the other methods listed in the question are also valid lifecycle methods that you might use in your component, they are not required. Here's a brief overview of the other methods:

  • Load: This method is called when the component is first loaded and can be used to load any external dependencies that the component requires.
  • getView: This method is used to render the component's view and is called once during the component's lifecycle.
  • getOutputs: This method is used to return any outputs that the component generates and is called whenever the component's outputs need to be updated.

Prev Question Next Question