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SCOPE. Visual Basic Hands-on Training. Objectives. Understand what is a program Understand what programming is Understand the program development life cycle Create a Visual Basic 2005 Windows Application project. What is a Computer Program?. - PowerPoint PPT PresentationTRANSCRIPT
Visual Basic 2005
SCOPE
Visual Basic Hands-on
Training
Chapter 2: Program and Graphical User Interface Design 2
2 Objectives
►Understand what is a program►Understand what programming is►Understand the program development life cycle ►Create a Visual Basic 2005 Windows Application
project
Chapter 2: Program and Graphical User Interface Design 3
2 What is a Computer Program?
A set of instructions that tells the computer hardware how to obtain input, what action to perform, and the output to produce.
Chapter 2: Program and Graphical User Interface Design 4
2 What Programs Do
Input Data (Values)
Process (Calculations)
Output Results (Information)
Chapter 2: Program and Graphical User Interface Design 5
2 What is a Developer?
One who develops a program (application) by writing the instructions (code) to produce a desired results, also referred to as a software engineer or computer programmer.
Chapter 2: Program and Graphical User Interface Design 6
2 Program Development Life Cycle
►Set of phases and steps that are followed by developers to design, create, and maintain a computer program• Gather and Analyze the Program Requirements• Design the User Interface• Design the Program Processing Objects• Code the Program• Test the Program• Document the Program/System• Deploy the Program/System• Maintain the Program/System
Chapter 2: Program and Graphical User Interface Design 7
2 Phase I: Gather and Analyze the Program Requirements
►Gather project requirements by interviewing users, reviewing current procedures, and completing other fact-gathering tasks
►Two types of requirements documentation• Requirements document• Use Case Definition or OIP
Chapter 2: Program and Graphical User Interface Design 8
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Chapter 2: Program and Graphical User Interface Design 9
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Chapter 2: Program and Graphical User Interface Design 10
2 OIP Form
OUTPUT Selected room
Room selected confirmation message
INPUT Select Image
PROCESS Display image
Hide image
Display message
Hide message
Enable button(s)
Disable button(s)
Exit program
Chapter 2: Program and Graphical User Interface Design 11
2 Phase 2: Design the User Interface
►Developers sometimes spend 25% to 40% of the program design time on the user interface• Presentation layer
►Use Visual Studio to create the user interface►Interface designs are often called mock-ups
Chapter 2: Program and Graphical User Interface Design 12
2 Problem Definition
►You are to create a hotel room selection program.
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2 Phase 3 – Design the Program
Chapter 2: Program and Graphical User Interface Design 14
2 OEA Form (1)
OBJECT Exit button
EVENT TASK
Click Exit program
OBJECT Standard Room button
EVENT TASK
Click Display Standard room imageHide Deluxe room imageEnable Select Room button
Chapter 2: Program and Graphical User Interface Design 15
2 OEA Form (2)
OBJECT Deluxe Room button
EVENT TASK
Click Display Deluxe room imageHide Standard room imageEnable Select Room button
OBJECT Select Room button
EVENT TASK
Click Disable buttonsDisplay room confirmation messageEnable Exit button
Chapter 2: Program and Graphical User Interface Design 16
2 Phase 4/5 – Code and Test the Program
►After the events and tasks within the events have been identified, the developer is ready to code the program• Entering Visual Basic statements to accomplish
the tasks specified on the event planning document
►Developer enters the code and implements the logic