Booa8 Slide 01
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This document provides an overview of an introductory course on building object-oriented applications in PowerBuilder. The course will teach object-oriented programming concepts like inheritance, polymorphism, encapsulation and how to implement them in PowerBuilder. Students will learn how to design reusable components, maximize code reuse and develop more quickly. They will gain hands-on experience through in-class labs and exercises building an example application. The goal is for students to learn techniques for constructing maintainable, extensible object-oriented applications in PowerBuilder.
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This document discusses different types of design patterns including creational, structural, behavioral, and Java EE design patterns. It provides examples of common design patterns like factory, singleton, strategy, observer, MVC, and DAO. Design patterns help provide reusable solutions to common problems in software design, promote code reuse, improve code quality and maintainability, and define standard ways to solve problems.
Booa8 Slide 03
The document describes inheritance and class hierarchies in PowerBuilder. Key points include:
- Inheritance allows classes to inherit structure and behavior from ancestor classes.
- A class hierarchy consists of base, abstract, and concrete classes. Abstract classes provide common behavior while concrete classes are instantiated.
- Extension layers provide a way to promote common code without affecting base classes.
- There are two approaches to window hierarchies - style-based uses pre-defined components while type-based codes abstract functionality.
Booa8 Slide 07
The document discusses encapsulation in PowerBuilder. Encapsulation is the process of incorporating properties and methods together in an object and limiting access to an object's properties and implementation of its behavior through information hiding. PowerBuilder allows assigning access rights to user functions and instance variables to restrict access. Events are always public while operational access rights can fine-tune access to instance variables, such as making variables public but read-only.
Booa8 Slide 02
- Objects are represented by their properties and methods, and are instances of classes. A class defines a set of objects.
- In PowerBuilder, classes are defined using painters like the Application, Menu, User Object, and Window painters. Class definitions are stored in libraries like PBLs, PBDs, DLLs and EXEs.
- Properties and methods can be added to classes. Properties are added as instance variables, while methods include events, functions, and external functions. Common types of methods that can be added are events, object functions, and external functions.
Booa8 Slide 04
The document discusses instantiating objects in PowerBuilder. It explains that an object instance is created from a class definition using instantiation. When a window is opened in PowerBuilder, it creates an instance of that window class. Objects can be instantiated visually using Open() or CREATE, or non-visually using just CREATE. Structures are automatically instantiated when their variables are declared. The class pool stores class definitions while the instance pool stores each object instance.
Booa8 Slide 09
Methods in PowerBuilder include events and functions. Events are executed from the bottom-up while functions are searched for from the bottom-up based on signature. Descendent methods can override or extend ancestor methods. Functions can be overloaded with different argument lists to perform different tasks. Events and functions can be invoked synchronously with Trigger or asynchronously with Post.
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Booa8 Slide 03
The document describes inheritance and class hierarchies in PowerBuilder. Key points include:
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Booa8 Slide 07
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Booa8 Slide 02
- Objects are represented by their properties and methods, and are instances of classes. A class defines a set of objects.
- In PowerBuilder, classes are defined using painters like the Application, Menu, User Object, and Window painters. Class definitions are stored in libraries like PBLs, PBDs, DLLs and EXEs.
- Properties and methods can be added to classes. Properties are added as instance variables, while methods include events, functions, and external functions. Common types of methods that can be added are events, object functions, and external functions.
Booa8 Slide 04
The document discusses instantiating objects in PowerBuilder. It explains that an object instance is created from a class definition using instantiation. When a window is opened in PowerBuilder, it creates an instance of that window class. Objects can be instantiated visually using Open() or CREATE, or non-visually using just CREATE. Structures are automatically instantiated when their variables are declared. The class pool stores class definitions while the instance pool stores each object instance.
Booa8 Slide 09
Methods in PowerBuilder include events and functions. Events are executed from the bottom-up while functions are searched for from the bottom-up based on signature. Descendent methods can override or extend ancestor methods. Functions can be overloaded with different argument lists to perform different tasks. Events and functions can be invoked synchronously with Trigger or asynchronously with Post.
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Object Oriented programming (OOP) is a programming paradigm that relies on the
concept of classes and objects. It is used to structure a software program into simple,
reusable pieces of code blueprints (usually called classes), which are used to create individual
instances of objects.
It is a programming paradigm that structures a software program according to objects.
Simply put, it creates objects that contain functions and data. This paradigm relies
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The main aim of OOP is to bind together the data and the functions that operate on them so
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Object takes space in the memory but
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Abstraction: hide important information in order to reduce complexity. It is when the user
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Implementation strategy patterns addressing concerns related to implementing source code to support
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SVR Technologies providing the course content of C Sharp.net. It was given by our expert Poornima to improve the knowledge of the readers. For more details about other IT courses please visit http://www.svrtechnologies.com
SVR Technologies
Contact: 91- 988 502 2027
info@svrtechnologies.com
http://svrtechnologies.com
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- The role of modeling in engineering by providing information about systems before they are built through mapping, reducing complexity, and being pragmatic.
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Dear students get fully solved assignments
Send your semester & Specialization name to our mail id :
“ help.mbaassignments@gmail.com ”
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Call us at : 08263069601
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Net Windows Developer Part 1
Este documento describe los componentes básicos para crear una interfaz de usuario en Windows Forms en .NET, incluyendo controles como TextBox, Label, Button, menús, cuadros de diálogo y más. También explica cómo crear aplicaciones MDI, agregar manejadores de eventos en tiempo de diseño y ejecución, y cómo usar diferentes controles como ListBox, DataGridView, PictureBox y ToolStrip.
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