Book Image

Visual Basic Quickstart Guide

By : Aspen Olmsted
Book Image

Visual Basic Quickstart Guide

By: Aspen Olmsted

Overview of this book

Whether you’re an absolute beginner or an experienced developer looking to learn the Visual Basic language, this book takes a hands-on approach to guide you through the process. From the very first chapters, you'll delve into writing programs, exploring core concepts such as data types, decision branching, and iteration. Additionally, you’ll get to grips with working with data structures, file I/O, and essential object-oriented principles like inheritance and polymorphism. This book goes beyond the basics to equip you with the skills to read and write code across the entire VB family, spanning VB Script, VBA, VB Classic, and VB.NET, enabling you to handle legacy code maintenance with ease. With clear explanations, practical examples, and hands-on exercises, this book empowers you to tackle real-world software development tasks, whether you're enhancing existing projects or embarking on new ones. It addresses common challenges like distinguishing between the variations of the VB programming language to help you choose the right one for your projects. Don't let VB's extensive legacy daunt you; embrace it with this comprehensive guide that equips you with practical, up-to-date coding skills to overcome the challenges presented by Visual Basic's rich history of over two decades.
Table of Contents (27 chapters)
Free Chapter
1
Part 1:Visual Basic Programming and Scripting
9
Part 2:Visual Basic Files and Data Structures
14
Part 3:Object-Oriented Visual Basic
20
Part 4:Server-Side Development

Building the project in the VB.NET console

This simple console application is written in the VB.NET programming language. This code snippet demonstrates how to read a .csv file containing student names and grades and store them in a dictionary with a list of grades. Let’s break down the code:

  1. The following lines import the necessary namespaces for file operations (System.IO) and working with collections (System.Collections.Generic):
    Imports System.IO
    Imports System.Collections.Generic
  2. The code is enclosed within a module called MainModule; the entry point is the Main subroutine. The Main subroutine is where the execution of the program starts:
    Module MainModule
           Sub Main()
               ' Main code goes here
           End Sub
    End Module
  3. The filePath variable stores the path to the CSV file:
    Dim filePath As String = "students.csv&quot...