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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.
Can we call Apex class from screen flow?
Flow Builder comes with a lot of functionality, but sometimes your flow needs to do more than the default elements allow. In that case, call an Apex class from your flow by using an Apex action.
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.
How to call APEX method from on load of visual force page?
Basically Visual Force page has some criteria, so I want to call this after setting criteria. Run the report and export as Excel. How can take approach for calling certain apex method from on load of Visual force page.
How to call the APEX method in JavaScript?
You can use the action attribute of the page tag for this – that will execute an action method on the controller before anything is rendered. E.g. If this causes a problem, the other way is to execute some JavaScript when the page loads that invokes the action method and then renders the rest of the page.
Why do I need public APEX method in Excel?
I want to call public apex method on load of visual force page, for purpose of Excel exporting. But I don’t want to put that method in Constructor of apex class, because of some limitation (example:I need to query all the records and leading to too many soql exception).
Why do I need constructor of apex class?
But I don’t want to put that method in Constructor of apex class, because of some limitation (example:I need to query all the records and leading to too many soql exception). Basically Visual Force page has some criteria, so I want to call this after setting criteria. Run the report and export as Excel.