November 2015
Intermediate to advanced
256 pages
5h 13m
English
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CHAPTER 19
File Browse Validation
Browsers offer native functionality for selecting files to upload. APEX then provides the smarts to convert the incoming data into a BLOB ready for database storage with the File Browse item component.
A common request is to validate the file before the page is submitted—for instance, limiting uploadable file size. Doing so can prevent excess network traffic if the page is prevented from loading the file until it meets size and type requirements. There is no point validating something in the database when it can be done on the web page.
This chapter not only applies this practical example, but it helps you locate ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.