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How do you call Apex from Visualforce page?
To call an Apex class from custom button or link on the object detail page, create a VisualForce page and call the Apex class method via the action attribute to make it work. Following is some sample code showing how to do that. The action method invoked when this page is requested by the server.
How do you call a method from Visualforce page?
When we click on the “click” button it will invoke pageReference show() method. pageReference is the return type of array method that we have called from visualforce page. So Whenever you want to redirect from one page to another page or want to change some values by calling methods from the apex controller class.
How can you refresh a particular section of a Visualforce?
ReRender is used to refresh a particular section of the visual force page. We have to just mention the id of the page section (in the ReRender attribute) that needs to be refreshed. In the following example Clicking of the command button “Refresh Lower Page Block” refreshes the lower page block.
Can we call Queueable from Queueable method?
Future methods cannot be monitored, but queueable apex can be monitored using the job id which is returned by System. enqueueJob() In execution cycle, you cannot call from one future method to another future method. Its achieved inqueueable class by using the Chaining Jobs.
Its possible, call apex:actionFunction from your apex:commandButton ‘s oncomplete, which calls your controller method. Possible using actionFunction that needs to be called from commandButton’s oncomplete event. Below is the sample code.
How does a command button work in Salesforce?
The button executes an action defined by a controller, and then either refreshes the current page, or navigates to a different page based on the PageReference variable that is returned by the action. An component must always be a child of an component.
What is the Boolean value for action in apex?
A Boolean value that specifies whether the action associated with this component should happen immediately, without processing any validation rules associated with the fields on the page. If set to true, the action happens immediately and validation rules are skipped. If not specified, this value defaults to false.
Possible values include “RTL” (right to left) or “LTR” (left to right). A Boolean value that specifies whether this button should be displayed in a disabled state. If set to true, the button appears disabled. If not specified, this value defaults to false.