Agenda

What is Visualforce?

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Salesforce Visualforce is a Model-View-Controller (MVC) framework or development tool which allows programmers to develop complex customized user interfaces hosted on the Lightning platform. Visualforce development tools divide the development processes across designers (to build designs or interfaces) and developers (create business logics).

Easy Development

All the changes performed by the developers can be viewed by them on the same window. It helps them to verify the output instantly and perform necessary actions (saves or updates). The editor of Visualforce is packed with various features (e.g. auto-completion and syntax highlighting) to make coding effective.

Easy Integration with Web-based UI Technologies

Visualforce markup finally rendered into HTML format, which allow designers to use Visualforce tags directly with codes (HTML, flash, JavaScript) that run within each HTML page on platforms like Lightning and Force.

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Auto Upgradation

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Whenever any other portion of the Lightning or Force platforms is upgraded then the users do not require to update Visualforce pages. In Visualforce case all the pages are saved as metadata which upgrade automatically with the rest of the system.

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Hosted Platform

Visualforce pages are tightly integrated and show the same performance as standard Salesforce pages. Hence, they are rendered and complied completely by the Lightning platform.

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Model-view-controller (MVC)

Architecture in Salesforce

It is a software pattern that separates information representation from user interaction. It divides the application into three manageable parts.

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"Schema", generically, refers to the structure of the database. In Salesforce terms, that means the set of objects you have, the fields on those objects, and the relationships between them. You'll see this usage, for example, in the Schema Builder tool in Setup

Salesforce metadata

It is the configurations, code, automation logic, and page layouts that define how objects (and therefore records) behave – and also the “look and feel” of your Salesforce org.

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Metadata is crucial for Salesforce development as it allows developers and administrators to define the behavior of the Salesforce application without writing code. Examples of Salesforce metadata include custom objects, fields, page layouts, workflows, validation rules, and more.

Visualforce Tags

Input tags

Output tags

Select tags

Form tags

page tags

action tags

Style tags

other

Many

Display account Related List

Show header of Cases

enhancedList tag in Visualforce Page

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SectionHeader tag in Visualforce Page

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What is Trigger ?

Considerations

“”Before Delete”” Event Example

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Create EmailUtils Class for Sending Email

Create EmailUtils Class for Sending Email

Schedule Job

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sObject is not allowed in future as an argument��sObject can change between the time you call the method and the time it executes. It may be possible that the argument will receive the older version and can overwrite them.

Mixed DML error :��This type of error occurs when we try to perform DML operation on setup and nonsetup objects in a single transaction

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Exception Handling

Queries ?!

Thank You!