TAILIEUCHUNG - About Java and xBaseJ- P6

Tham khảo tài liệu 'about java and xbasej- p6', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Chapter 2 - Mega-Zillionaire Application 101 Figure 8 Entry form One thing which might not be obvious is the Deleted prompt. You cannot enter a value here but when a record which has been flagged for deletion is displayed will display in this box. Unless you use a lot of VCR-type software the row of buttons containing less-than and greater-than signs might not be intuitive. A single less-than sign moves towards the beginning multiples move to the very beginning. A single greater-than moves towards the end and multiples move to the very end. It probably wasn the best choice of labels but OK performs either an Add or an Update depending upon which mode you are currently in. There is no button to set the mode per se. If you find a record via the Find button or one of the navigation buttons you will be in find mode. By default the screen starts out in add mode. If you need to get back to add mode you must Clear which will both clear all entries on the screen and reset the screen back to add mode. 102 Chapter 2 - Mega-Zillionaire Application Figure 9 Browse form Although it is against my religion to design applications which load every record from a database into a spreadsheet that is what end users have come to expect thanks to the world s lowest quality software vendor Microsoft. Nobody with even the tiniest shred of computer science education would ever consider getting users used to seeing data displayed this way. It works only under the condition which lets it work here a very limited set of data stored locally and access read only. I did it because most of you were going to whine and snivel about wanting to do it. Most of you reading this book will not have had professional software development training. I cover this topic quite a bit in the OpenVMS Application Developer book ISBN-13 978-0-9770866-0-3 and the SOA book ISBN-13 978-0-9770866-6-5 . The spreadsheet design is horribly inefficient. I mnot talking about the code to create the spreadsheet itself I .

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