Understanding Programming Concepts and Writing a Simple Visual Basic Application

1
Understanding Programming Concepts and Writing a
Simple Visual Basic Application

• Chapter 1

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Visual Studio .NET

• A developmental tool for creating Windows and Web
  applications.
• A Windows application is designed to run on a
  desktop in the Windows interface.
• A Web application is designed to run from a web
  server using a browser interface.

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Visual Studio .NET

• A development environment is the comprehensive
  set of tools and features that allow you to
  develop, debug, and deploy applications.
• An Integrated Development Environment (IDE) is
  where all the features are made available within
  a common interface.

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Visual Studio .NET

• A profile is a collection of settings that
  defines the appearance of the IDE.
• The profile can be customized based on how you
  choose to work within the environment.
• A view defines how the interface elements appear
  on the screen.

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Customize My Profile

• My Profile on Start Page
• Student Developer
• Solution Explorer
• Dynamic Help
• Start Page
• Task List

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Customize My Profile

• Visual Studio Developer
• Get Started

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Customize My Profile

• ToolsOptions

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Hiding Tool Windows Automatically

• A Pushpin is a small icon appearing in a tool
  window that determines whether the window will
  display and hide automatically, also known as
  Auto Hide.

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Hidden Solution Explorer

• Mouse over will display the window.
• Mouse out will auto hide the window.

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Docking Tool Windows

• WindowDockable

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Visual Basic .NET

• Visual Basic.NET (VB.NET) is one of the language
  options available in the development environment.
• Visual Basic code is contained within a
  procedure.
• A procedure is a block of Visual Basic statements.

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Solutions

• An application is made of a solution.
• A solution is the starting point for creating
  applications in Visual Studio.NET.
• A solution is the container or box that manages
  all the individual pieces that make up your
  application.
• Solutions contain one or more projects.

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Projects

• A project can be created using any Visual
  Studio.NET Language.
• A solution can have multiple projects created in
  different languages.
• A project contains files.
• The IDE organizes solutions, projects, and files,
  and holds all of your work in a hierarchy.

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Creating a new VB .NET project

• FileNewProject
• Windows Application
• Name

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Creating a New Project

• Type in the name of the project.
• IDE uses the project name to create a new folder
  for each project you create.
• Makes file management easier.
• Browse for the location to store this project.

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Projects

• When you create a project, Visual Studio.NET
  automatically generates a solution.
• A solution usually has one or more related
  projects.
• A single solution can consist of multiple
  projects.

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Solution Explorer

• Provides an organized view of your solution,
  projects, and their files.
• Common tree-view interface.
• Collapses and expands.

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Windows Form Designer is the visual workspace for
creating the interface for your application.
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Online Help

• HelpSearch
• Look for
• Filter by
• Search

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Objects

• An object is a combination of code and data you
  can treat as a single unit.
• Menu, button, text box, etc.
• A form is an object.
• The entire application is an object.
• A project requires at least one form.

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Controls

• Controls are objects that make up the user
  interface.
• A form is a container for the controls a user
  interacts with when using the application.
• Text Box
• Label
• Button

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Toolbox

• ViewToolbox
• Toolbox button
• Mouse over

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Properties

• Characteristics
• Attributes
• Data
• Name
• Text

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Events

• An event is an action that triggers a program
  instruction.
• An object's code specifies what the object will
  do in response to an event.

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Object Methods

• A method is a specific action an object can
  perform when the application is running.
• A button has a Hide and a Show method.
• Methods determine which actions an object can
  perform.

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Summary

• Properties characterize an object's appearance.
• Events are the actions to which a control
  responds.
• Methods characterize an object's behavior.

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Design Time vs. Run Time

• Design time is the state of the application while
  you are working with a project using the
  development environment.
• Run time is the state of the application while it
  is running or executing.

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Setting Properties

• Design Time Select the object then change
  values in the Properties Window.

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Setting Properties

• Run time Assign a property value using an
  Assignment statement in VB code that responds to
  an event.
• Object.Property Value
• txtLastName.Text "Smith"

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Naming Objects

• Long enough to be meaningful.
• Short enough to avoid verbosity.
• Must be unique.
• 1st character must be letter or underscore.
• Naming convention is Modified-Hungarian Notation.
• Standards help programmers produce consistent
  code.

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Modified-Hungarian Notation

• Uses a lowercase 3-character prefix to indicate
  the object type.

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Procedural Programming

• The program specifies the sequence of all
  operations in a step-by-step manner, and the
  order of the program statements determine how the
  computer program will carry out a specific task.
• Payroll
• There is no user interaction.

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Event Driven Programming

• Write code that responds to specific events.
• There is no set sequence of events.
• Objects respond to events in different ways.
• Objects and their events are reusable.

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Code Window
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• Class Name List
• Method Name List

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Run the Application

• Start Button.
• Press the Tab key to verify that the tab index
  property is set correctly.
• Test each button.
• Stop Debugging button.
• FileClose Solution
• FileExit

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Saving Files

• If changes have been made that have not been
  saved, an displays on the Form Designer window
  tab.
• Save All button
• The disappears which indicates that all changes
  have been saved.