Starting Out With Visual Basic 2012

935 Pages·2013·18.412 MB·English

by  Tony Gaddis, Kip Irvine

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STARTING OUT WITH
Visual Basic 2012
®
Sixth Edition
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STARTING OUT WITH
Visual Basic 2012
®
Sixth Edition
Tony Gaddis
Haywood Community College
Kip Irvine
Florida International University
Boston Columbus Indianapolis New York San Francisco Upper Saddle River
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Credits and acknowledgments borrowed from other sources and reproduced, with permission, in this
textbook appear on the Credits page at the end of the text.
Copyright © 2014, 2011, 2010 Pearson Education, Inc.,publishing as Addison-Wesley. All rights
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Library of Congress Cataloging-in-Publication Data available upon request.
10 9 8 7 6 5 4 3 2 1
ISBN 10: 0-13-312808-3
ISBN 13: 978-0-13-312808-6
Contents in Brief
Preface xvii
Chapter 1 Introduction to Programming and Visual Basic 1
Chapter 2 Creating Applications with Visual Basic 43
Chapter 3 Variables and Calculations 111
Chapter 4 Making Decisions 209
Chapter 5 Lists and Loops 285
Chapter 6 Procedures and Functions 355
Chapter 7 Multiple Forms, Modules, and Menus 403
Chapter 8 Arrays and More 469
Chapter 9 Files, Printing, and Structures 541
Chapter 10 Working with Databases 597
Chapter 11 Developing Web Applications 677
Chapter 12 Classes, Collections, and Inheritance 733
Appendix A Advanced User Interface Controls and Techniques 795
Appendix B Windows Presentation Foundation (WPF) 809
Appendix C Converting Mathematical Expressions
to Programming Statements 821
Appendix D Answers to Checkpoints 823
Appendix E Glossary 841
Index 853
Credits 883
v
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Contents
Preface xvii
Chapter 1 Introduction to Programming and Visual Basic 1
1.1 Computer Systems: Hardware and Software . . . . . . . . . . . . . . . . . . . . . . . .2
1.2 Programs and Programming Languages . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
TUTORIAL 1-1: Running the Wage Calculatorapplication . . . . . . . . . . . . . . . . . . . . .8
TUTORIAL 1-2: Running an application that demonstrates event handlers . . . . . . . .11
1.3 More about Controls and Programming . . . . . . . . . . . . . . . . . . . . . . . . . . .11
TUTORIAL 1-3: Running an application that demonstrates various controls . . . . . . .12
1.4 The Programming Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
1.5 Visual Studio and Visual Studio Express (the Visual Basic Environment) . . . .20
TUTORIAL 1-4: Starting Visual Studio and setting up the environment . . . . . . . . . . .21
TUTORIAL 1-5: Starting a new Visual Basic project . . . . . . . . . . . . . . . . . . . . . . . . . .25
TUTORIAL 1-6: Becoming familiar with the Visual Studio environment . . . . . . . . . .34
Summary 36 • Key Terms 37 • Review Questions and Exercises 37 •
Programming Challenges 41
Chapter 2 Creating Applications with Visual Basic 43
2.1 Focus on Problem Solving: Building the DirectionsApplication . . . . . . . . . .43
TUTORIAL 2-1: Beginning the Directionsapplication . . . . . . . . . . . . . . . . . . . . . . . .46
TUTORIAL 2-2: Adding a Label control to the Directionsapplication . . . . . . . . . . . .48
TUTORIAL 2-3: Changing the Label’s font size and style . . . . . . . . . . . . . . . . . . . . . .50
TUTORIAL 2-4: Deleting a control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
TUTORIAL 2-5: Inserting a PictureBox control . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
TUTORIAL 2-6: Running the application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
TUTORIAL 2-7: Opening an existing project and becoming familiar
with the Propertieswindow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
2.2 Focus on Problem Solving: Responding to Events . . . . . . . . . . . . . . . . . . . .63
TUTORIAL 2-8: Adding a Label control for the written directions . . . . . . . . . . . . . . .64
TUTORIAL 2-9: Adding the Display Directionsbutton and its Click
event handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
TUTORIAL 2-10: Adding the Exitbutton and its Click event handler . . . . . . . . . . . .76
TUTORIAL 2-11: Adding comments to the Directionsproject code . . . . . . . . . . . . . .79
TUTORIAL 2-12: Changing the text colors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
TUTORIAL 2-13: Setting the FormBorderStyle property and locking
the controls in the Directionsapplication . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
2.3 Modifying a Control’s Text Property with Code . . . . . . . . . . . . . . . . . . . . .85
TUTORIAL 2-14: Examining an application that displays messages
in a Label control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
2.4 The AutoSize, BorderStyle, and TextAlign Properties . . . . . . . . . . . . . . . . . .88
2.5 Displaying User Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
vii
viii Contents
TUTORIAL 2-15: Displaying message boxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
2.6 Clickable Images . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95
TUTORIAL 2-16: Writing Click event handlers for PictureBox controls . . . . . . . . . . 95
2.7 Using Visual Studio Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97
2.8 Debugging Your Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99
TUTORIAL 2-17: Locating a compile error in design mode . . . . . . . . . . . . . . . . . . . 100
Summary 102 • Key Terms 103 • Review Questions and Exercises 104 •
Programming Challenges 106
Chapter 3 Variables and Calculations 111
3.1 Gathering Text Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111
TUTORIAL 3-1: Using a TextBox control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
TUTORIAL 3-2: Building the Date Stringapplication . . . . . . . . . . . . . . . . . . . . . . . 115
TUTORIAL 3-3: Using the Focusmethod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
TUTORIAL 3-4: Changing the tab order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
TUTORIAL 3-5: Setting access keys, accept, and cancel buttons . . . . . . . . . . . . . . . 123
3.2 Variables and Data Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124
TUTORIAL 3-6: Assigning text to a variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
3.3 Performing Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .136
3.4 Mixing Different Data Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .143
TUTORIAL 3-7: Examining a Simple Calculatorapplication . . . . . . . . . . . . . . . . . . 151
3.5 Formatting Numbers and Dates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .154
TUTORIAL 3-8: Examining the Format Demoapplication . . . . . . . . . . . . . . . . . . . 157
3.6 Class-Level Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .159
3.7 Exception Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .160
TUTORIAL 3-9: Exception Demonstration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
TUTORIAL 3-10: Salary Calculatorproject with exception handling . . . . . . . . . . . 164
3.8 Group Boxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .170
3.9 The Load Event . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .173
3.10 Focus on Program Design and Problem Solving: Building the Room
Charge CalculatorApplication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .173
TUTORIAL 3-11: Beginning the Room Charge Calculatorapplication . . . . . . . . . . 179
TUTORIAL 3-12: Changing a label’s colors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
3.11 More about Debugging: Locating Logic Errors . . . . . . . . . . . . . . . . . . . . .186
TUTORIAL 3-13: Single-stepping through an application’s code at runtime . . . . . . 186
Summary 192 • Key Terms 195 • Review Questions and Exercises 196 •
Programming Challenges 202
Chapter 4 Making Decisions 209
4.1 The Decision Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .209
4.2 The If...ThenStatement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .211
TUTORIAL 4-1: Examining an application that uses the If...Thenstatement . . 214
4.3 The If...Then...ElseStatement . . . . . . . . . . . . . . . . . . . . . . . . . . .217
TUTORIAL 4-2: Completing an application that uses
the If...Then...Elsestatement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
4.4 The If...Then...ElseIfStatement . . . . . . . . . . . . . . . . . . . . . . . . .220