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One of the new features added to PowerBuilder 2017 R2 is support for REST web services.  This feature isn't 100% complete, as additional REST functionality is planned for 2017 R3.  There's still a lot in the R2 release to look at though.

To make things simple for the demo, we're going to use a online REST web service called JSONPlaceHolder..  The service doesn't require creating an account or user authentication.  While the GET (retrieve) methods are fully functional the POST ( insert ), PUT/PATCH ( update ) and DELETE (delete) methods are placeholders.  They return result codes or in the case of POST the id value of the inserted row, but they don't actually modify the data.

Note that while REST web services can return data in any internet mime encodable format, the vast majority of them use JSON  and JSON is the only data format supported by the REST client object in PowerBuilder 2017.

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Support for using Git as a source control system without going through a bridge product was added in 2017 R2 and covered in a previous blog post.  In this blog post we're going to look at the enhancements that were added to that feature in 2017 R3. 

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There were some JSON features introduced in 2017 R2, in particular the JSONGenerator and JSONParser, which were covered in a previous blog post.  2017 R3 introduces additional important JSON features, in particular JSON import/export from a DataWindow, and a JSONPackage object that is used to merge/extract JSON data sets.  Those will be covered in this blog post.

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PowerBuilder v12.1, build 7055
Windows 7 32 bit platform
Windows 7 64 bit platform
Windows 10, 64 bit platform


A Sample Inno Setup ".ISS" File
Olan Knight
28-Mar-2019


Once upon a time, long, long ago, we used a product called InstallShield to create the Windows installer for our various products. Over time, the cost for InstallShield became prohibitive, and we eventually settled on using Inno Setup as the replacement tool to create out installers.

You can get the free tool here:    http://www.jrsoftware.org/isinfo.php
The excellent HELP file is here:     http://www.jrsoftware.org/ishelp/   

It's a simple and intuitive tool, but it has some quirks and there is a learning curve. 
Inno Setup uses an ".iss" file as its source code. It compiles that ISS file into the SETUP.EXE for your application, with the file name being up to you.

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Hola Amigos, Comparto mi curso básico de PowerBuilder en Español. Los temas son los siguientes:

  • Introducción a PowerBuilder
  • Ambiente de desarrollo de PowerBuilder
  • Crear un objeto Aplicación
  • Creación de ventanas
  • Power Scripts
  • Bases de datos relacionales
  • Painter de Bases de datos
  • Objeto DataWindow
  • Conexión a Bases de datos
  • Programación orientada a objetos en PowerBuilder
  • Construyendo Menus
  • Introducción a aplicaciones MDI
  • Usando DataWindow Controls y MDI Sheets
  • Mostrando datos de la base de datos y declarando User Events
  • Conexión de DataWindows a Bases de datos
  • Declaración y uso de funciones en ventanas
  • Declaración y uso de eventos en ventanas
  • Creando instancias de ventanas
  • Declarando y usando Funciones
  • Modificando, Insertando, y borrando filas
  • Salvando cambios en la base de datos
  • Creación de Ejecutables

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POWERBUILDER AND GRAPH DATABASES

Because I could find nothing, anywhere, regarding PowerBuilder (PB) and graph databases (GDB), I thought I’d provide some information following some dabbling with this emerging (well, emerged now) technology.

I developed a keen interest in GDBs after a contracting friend who does some work for me had attended a NEO4J course – he contacted me and said the application I develop would be ideally suited for a GDB.

I looked at NEO4J and quickly realised the code would not fit with the PB my application.  Then another friend advised that MS SQLServer had introduced basic graph DB features in its 2017 version, with enhancements expected to follow.   I gave it a try.

(I should point out that I’m not an experienced programmer - self-taught, I work alone so I can’t learn from peers, too busy on my work to go off and learn new skills, long in the tooth, and need to get a twelve-year-old to change my digital watch at daylight savings.  So the caveat is that experienced programmers may know ways far better than I’ll lay out here.)