Clearly Visual Basic: Programming with Microsoft Visual Basic 2012

674 Pages·2013·62.892 MB·English

by  Diane Zak

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THIRD EDITION
CLEARLY VISUAL BASIC®
PROGRAMMING WITH MICROSOFT® VISUAL BASIC® 2012
DIANE ZAK
AustralialBrazillJapanlKorealMexicolSingaporelSpainlUnitedKingdomlUnitedStates
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ClearlyVisualBasic: ª2014CourseTechnology,CengageLearning
ProgrammingwithMicrosoft
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Brief Contents
iii
Preface . . . . . . . . . . . . . . . . . . . . . . . . . .xii
CHAPTER 1 I Am Not a Control Freak! (Control Structures) . . . . . . . . . 1
CHAPTER 2 First You Need to Plan the Party (Problem-Solving Process) . . 17
CHAPTER 3 I Need a Tour Guide (Introduction to Visual Basic 2012) . . . . 35
CHAPTER 4 Do-It-Yourself Designing (Designing Interfaces) . . . . . . . . 63
CHAPTER 5 The Secret Code (Assignment Statements) . . . . . . . . . . 87
CHAPTER 6 Where Can I Store This? (Variables and Constants) . . . . . . 107
CHAPTER 7 What’s Wrong With It? (Syntax, Logic, and Run Time Errors) . . 131
CHAPTER 8 Decisions, Decisions, Decisions (Selection Structure) . . . . . 151
CHAPTER 9 Time to Leave the Nest (Nested Selection Structures) . . . . . 185
CHAPTER 10 So Many Paths…So Little Time (Multiple-Alternative
Selection Structures) . . . . . . . . . . . . . . . . . . . 211
CHAPTER 11 Testing, Testing…1, 2, 3 (Selecting Test Data) . . . . . . . . 237
CHAPTER 12 How Long Can This Go On? (Pretest Loops) . . . . . . . . . . 261
CHAPTER 13 Do It, Then Ask Permission (Posttest Loops) . . . . . . . . . 293
CHAPTER 14 Let Me Count the Ways (Counter-Controlled Loops) . . . . . . 305
CHAPTER 15 I’m on the Inside; You’re on the Outside (Nested Loops) . . . . 329
CHAPTER 16 I Hear You Are Breaking Up (Sub Procedures) . . . . . . . . . 353
CHAPTER 17 Talk to Me (Function Procedures) . . . . . . . . . . . . . . 383
CHAPTER 18 A Ray of Sunshine (One-Dimensional Arrays) . . . . . . . . . 403
CHAPTER 19 Parallel and Dynamic Universes (More on
One-Dimensional Arrays) . . . . . . . . . . . . . . . . . . 431
CHAPTER 20 Table Tennis, Anyone? (Two-Dimensional Arrays) . . . . . . . 455
CHAPTER 21 Building Your Own Structure (Structures) . . . . . . . . . . . 479
Copyright 2013 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s).
Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.
BRIEF CONTENTS
CHAPTER 22 I’m Saving for the Future (Sequential Access Files) . . . . . . 497
CHAPTER 23 The String Section (String Manipulation) . . . . . . . . . . . 515
CHAPTER 24 I’m Suffering from Information Overload (Access Databases) . . 539
CHAPTER 25 The Missing “LINQ” (Querying a Database) . . . . . . . . . . 569
iv
CHAPTER 26 I Love This Class (Creating a Class) . . . . . . . . . . . . . 587
CHAPTER 27 Getting “Web-ified” (Web Applications) . . . . . . . . . . . . 611
APPENDIX A Data Types . . . . . . . . . . . . . . . . . . . . . . . . 645
APPENDIX B Answers to Mini-Quizzes and TRY THIS Exercises . . . . . .Online
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . 647
Copyright 2013 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s).
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Contents
v
Preface . . . . . . . . . . . . . . . . . . . . . . . . . xii
CHAPTER 1 I Am Not a Control Freak! (Control Structures) . . . . . . . . 1
Control Structures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
The Sequence Structure . . . . . . . . . . . . . . . . . . . . . . . . . . 2
The Selection Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
The Repetition Structure . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
CHAPTER 2 First You Need to Plan the Party (Problem-Solving Process) . . 17
How Do Programmers Solve Problems? . . . . . . . . . . . . . . . . . . . . .18
Step 1—Analyze the Problem . . . . . . . . . . . . . . . . . . . . . . . . 18
Step 2—Plan the Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . 20
Step 3—Desk-Check the Algorithm . . . . . . . . . . . . . . . . . . . . . . 24
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
CHAPTER 3 I Need a Tour Guide (Introduction to Visual Basic 2012) . . . . 35
Ok, the Algorithm Is Correct. What’s Next? . . . . . . . . . . . . . . . . . . . .36
Creating a Visual Basic Windows Application . . . . . . . . . . . . . . . . . . .38
So Many Windows! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Creating the User Interface . . . . . . . . . . . . . . . . . . . . . . . . . .41
Save, Save, Save . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Whose Property Is It? . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Using the FORMAT Menu . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Lock Them Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Ok, Let’s See the Interface in Action! . . . . . . . . . . . . . . . . . . . . . .52
Closing the Current Solution . . . . . . . . . . . . . . . . . . . . . . . . . .53
Opening an Existing Solution . . . . . . . . . . . . . . . . . . . . . . . . . .54
Exiting Visual Studio . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Copyright 2013 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s).
Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.
CONTENTS
CHAPTER 4 Do-It-Yourself Designing (Designing Interfaces) . . . . . . . . 63
Delegating the Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Making the Interface More User-Friendly . . . . . . . . . . . . . . . . . . . . . . 68
Do What I Tell You to Do . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
The Me.Close() Instruction . . . . . . . . . . . . . . . . . . . . . . . . . 74
vi Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
CHAPTER 5 The Secret Code (Assignment Statements) . . . . . . . . . . 87
The Fun Starts Here . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
The Val Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Who’s in Charge of This Operation? . . . . . . . . . . . . . . . . . . . . . . . . . 91
Your Assignment, if You Choose to Accept It . . . . . . . . . . . . . . . . . . . . . 94
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
CHAPTER 6 Where Can I Store This? (Variables and Constants) . . . . . . . 107
Using Shoe Boxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
So, What’s Your Type? . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Let’s Play the Name Game . . . . . . . . . . . . . . . . . . . . . . . . . . 110
You’ll Need a Reservation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
How Many Variables Should I Use? . . . . . . . . . . . . . . . . . . . . . . . . 111
The TryParse Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Check, Please…I’m Ready to Go . . . . . . . . . . . . . . . . . . . . . . . . 115
Using Constants to Keep Things…Well, the Same . . . . . . . . . . . . . . . . . . 116
Dressing Up the Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
CHAPTER 7 What’s Wrong With It? (Syntax, Logic, and Run Time Errors) . . . 131
There’s a Bug in My Soup! . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Finding Syntax Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Locating Logic Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
I’ve Reached My Breaking Point . . . . . . . . . . . . . . . . . . . . . . . . 141
Run Time Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
CHAPTER 8 Decisions, Decisions, Decisions (Selection Structure) . . . . . 151
Someone Might Need to Make a Decision . . . . . . . . . . . . . . . . . . . . . 152
The If…Then…Else Statement . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Stop That Runner! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Copyright 2013 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s).
Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.
Are We in the Black or in the Red? . . . . . . . . . . . . . . . . . . . . . 160
You Deserve a Bonus . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Examining Another Problem Specification . . . . . . . . . . . . . . . . . . . 168
Hey, That’s Not the Way I Would Have Done It . . . . . . . . . . . . . . . . 173
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
vii
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
CHAPTER 9 Time to Leave the Nest (Nested Selection Structures) . . . 185
Nested Selection Structures . . . . . . . . . . . . . . . . . . . . . . . . . 186
10-4, Over and Out . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
How Much Is It? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
That’s Way Too Logical for Me . . . . . . . . . . . . . . . . . . . . . . . . 198
Summary of Operators . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
CHAPTER 10 So Many Paths…So Little Time (Multiple-Alternative
Selection Structures) . . . . . . . . . . . . . . . . . . 211
Which Way Should I Go? . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
The Fitness Spa Health Club Application . . . . . . . . . . . . . . . . . . . 213
Don’t Be So Sensitive . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
What’s the Next Case on the Docket? . . . . . . . . . . . . . . . . . . . . . 220
Using Select Case in the Fitness Spa Health Club Application . . . . . . . . . . 222
Specifying a Range of Values in a Case Clause’s ExpressionList . . . . . . . . . . 223
Coding the ABC Corporation Application . . . . . . . . . . . . . . . . . . . 224
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
CHAPTER 11 Testing, Testing…1, 2, 3 (Selecting Test Data) . . . . . . 237
Will Your Application Pass the Test? . . . . . . . . . . . . . . . . . . . . . . 238
The Coffee Palace–Version 1 Application . . . . . . . . . . . . . . . . . . . . 238
The Coffee Palace–Version 2 Application . . . . . . . . . . . . . . . . . . . . 241
Stop! This Is a Restricted Area! . . . . . . . . . . . . . . . . . . . . . . . 243
The Shady Hollow Hotel Application . . . . . . . . . . . . . . . . . . . . . . 245
The CD Shop Application . . . . . . . . . . . . . . . . . . . . . . . . . . 247
The Tiger Hotel Application . . . . . . . . . . . . . . . . . . . . . . . . . 250
I Need to Tell You Something . . . . . . . . . . . . . . . . . . . . . . . 251
Just When You Thought It Was Safe . . . . . . . . . . . . . . . . . . . . . 253
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
Copyright 2013 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s).
Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.
CONTENTS
CHAPTER 12 How Long Can This Go On? (Pretest Loops) . . . . . . . . . . 261
Over and Over Again . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
Do I Need a Loop? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
The Do…Loop Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
Counter Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268
viii Cheerleader Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270
My Dream Car Application . . . . . . . . . . . . . . . . . . . . . . . . . . . 274
The Sales Express Application . . . . . . . . . . . . . . . . . . . . . . . . . . 276
The InputBox Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Can I Abbreviate That Assignment Statement? . . . . . . . . . . . . . . . . . . . 283
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288
CHAPTER 13 Do It, Then Ask Permission (Posttest Loops) . . . . . . . . . . 293
Testing After the Fact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294
More on the Do…Loop Statement . . . . . . . . . . . . . . . . . . . . . . . . 296
Pseudocode and Flowchart Containing a Posttest Loop . . . . . . . . . . . . . . . 297
The Bouncing Robot Application . . . . . . . . . . . . . . . . . . . . . . . . . 297
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
Key Term . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301
CHAPTER 14 Let Me Count the Ways (Counter-Controlled Loops) . . . . . . . 305
When Will It Stop? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306
Spaceship–Version 1 Application . . . . . . . . . . . . . . . . . . . . . . . . 309
Spaceship–Version 2 Application . . . . . . . . . . . . . . . . . . . . . . . . 310
Hey, Turn That Noise Down! . . . . . . . . . . . . . . . . . . . . . . . . . . . 312
The Monthly Payment Calculator Application . . . . . . . . . . . . . . . . . . . . 312
The Financial.Pmt Method . . . . . . . . . . . . . . . . . . . . . . . . . . . 314
But They Said There Were No Strings Attached . . . . . . . . . . . . . . . . . . 315
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
CHAPTER 15 I’m on the Inside; You’re on the Outside (Nested Loops) . . . . . 329
One Loop Within Another Loop . . . . . . . . . . . . . . . . . . . . . . . . . . 330
What Time Is It? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331
What Do I Owe Each Month? . . . . . . . . . . . . . . . . . . . . . . . . . . . 334
But I Want to Do It a Different Way . . . . . . . . . . . . . . . . . . . . . . . 341
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 343
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 343
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 343
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 346
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