Clearly Visual Basic: Programming with Microsoft Visual Basic 2010

594 Pages·2012·11.91 MB·English

by  Diane Zak

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CLEARLY VISUAL BASIC ®
PROGRAMMING WITH MICROSOFT® VISUAL BASIC® 2010
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SECOND EDITION
CLEARLY VISUAL BASIC®
PROGRAMMING WITH MICROSOFT® VISUAL BASIC® 2010
DIANE ZAK
AustralialBrazillJapanlKorealMexicolSingaporelSpainlUnitedKingdomlUnitedStates
ClearlyVisualBasic: ª2012CourseTechnology,CengageLearning
ProgrammingwithMicrosoft
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v
Brief Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . xiv
CHAPTER 1 I Am Not a Control Freak! (Control Structures) . . . . . . . . . . 1
CHAPTER 2 First You Need to Plan the Party (Problem-Solving Process) . . . 11
CHAPTER 3 I Need a Tour Guide (Introduction to Visual Basic 2010) . . . . . 27
CHAPTER 4 Do It Yourself Designing (Designing Interfaces) . . . . . . . . . 49
CHAPTER 5 The Secret Code (Assignment Statements) . . . . . . . . . . . 67
CHAPTER 6 Where Can I Store This? (Variables and Constants) . . . . . . . 81
CHAPTER 7 What’s Wrong with It? (Syntax and Logic Errors) . . . . . . . . .101
CHAPTER 8 Decisions, Decisions, Decisions (Selection Structure) . . . . . .115
CHAPTER 9 Time to Leave the Nest (Nested Selection Structures) . . . . . .139
CHAPTER 10 So Many Paths . . . So Little Time (Multiple-Alternative
Selection Structures) . . . . . . . . . . . . . . . . . . . .159
CHAPTER 11 Testing, Testing . . . 1, 2, 3 (Selecting Test Data) . . . . . . . .183
CHAPTER 12 How Long Can This Go On? (Pretest Loops) . . . . . . . . . . .203
CHAPTER 13 Do It, Then Ask Permission (Posttest Loops) . . . . . . . . . .231
CHAPTER 14 Let Me Count the Ways (Counter-Controlled Loops) . . . . . . .241
CHAPTER 15 I’m on the Inside; You’re on the Outside (Nested Loops) . . . . .261
CHAPTER 16 I Hear You Are Breaking Up (Sub Procedures) . . . . . . . . . .279
CHAPTER 17 Talk to Me (Function Procedures) . . . . . . . . . . . . . . .303
CHAPTER 18 A Ray of Sunshine (One-Dimensional Arrays) . . . . . . . . . .319
CHAPTER 19 Parallel and Dynamic Universes (More on One-Dimensional
Arrays) . . . . . . . . . . . . . . . . . . . . . . . . . . .341
CHAPTER 20 Table Tennis, Anyone? (Two-Dimensional Arrays) . . . . . . . .363
CHAPTER 21 Building Your Own Structure (Structures) . . . . . . . . . . . .383
vi
CONTENTS
CHAPTER 22 I’m Saving for the Future (Sequential Access Files) . . . . . . .399
CHAPTER 23 The String Section (String Manipulation) . . . . . . . . . . . .417
CHAPTER 24 I’m Suffering from Information Overload (Access Databases) . . .439
CHAPTER 25 The Missing “LINQ” (Querying a Database) . . . . . . . . . . .461
CHAPTER 26 I Love This Class (Creating a Class) . . . . . . . . . . . . . .475
CHAPTER 27 Getting “Web-ified” (Web Applications) . . . . . . . . . . . . .497
APPENDIX A Data Types . . . . . . . . . . . . . . . . . . . . . . . . .527
APPENDIX B Answers to Mini-Quizzes and TRY THIS Exercises . . . . . . . .529
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . .569
vii
Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . xiv
CHAPTER 1 I Am Not a Control Freak! (Control Structures) . . . . . . . . . . . 1
Control Structures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
The Sequence Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
The Selection Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
The Repetition Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
CHAPTER 2 First You Need to Plan the Party (Problem-Solving Process) . . . . 11
How Do Programmers Solve Problems? . . . . . . . . . . . . . . . . . . . . . . . . 12
Step 1—Analyze the Problem . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Step 2—Plan the Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Step 3—Desk-Check the Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . 18
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
CHAPTER 3 I Need a Tour Guide (Introduction to Visual Basic 2010) . . . . . . 27
Ok, the Algorithm Is Correct. What’s Next? . . . . . . . . . . . . . . . . . . . . . . . 28
Creating a Visual Basic Windows Application . . . . . . . . . . . . . . . . . . . . . . 29
So Many Windows! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Creating the User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Save, Save, Save . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Whose Property Is It? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Using the Format Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Lock Them Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Ok, Let’s See the Interface in Action! . . . . . . . . . . . . . . . . . . . . . . . . . 41
Closing the Current Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Opening an Existing Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Exiting Visual Studio 2010 or Visual Basic 2010 Express . . . . . . . . . . . . . . . . . 43
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
viii
CONTENTS
CHAPTER 4 Do It Yourself Designing (Designing Interfaces) . . . . . . . . . 49
Delegating the Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Making the Interface More User-Friendly . . . . . . . . . . . . . . . . . . . . . . . . 54
Do What I Tell You to Do . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
The Me.Close() Instruction . . . . . . . . . . . . . . . . . . . . . . . . . 58
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
CHAPTER 5 The Secret Code (Assignment Statements) . . . . . . . . . . . 67
The Fun Starts Here . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
The Val Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Who’s in Charge of This Operation? . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Your Assignment, if You Choose to Accept It . . . . . . . . . . . . . . . . . . . . . . 72
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
CHAPTER 6 Where Can I Store This? (Variables and Constants) . . . . . . . . 81
Using Storage Bins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
So, What’s Your Type? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Let’s Play the Name Game . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
You’ll Need a Reservation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
How Many Variables Should I Use? . . . . . . . . . . . . . . . . . . . . . . . . . . 85
The TryParse Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Check, Please…I’m Ready to Go . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Using Constants to Keep Things…Well, the Same . . . . . . . . . . . . . . . . . . . . 89
Dressing Up the Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
CHAPTER 7 What’s Wrong with It? (Syntax and Logic Errors) . . . . . . . . .101
There’s a Bug in My Soup! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Finding Syntax Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Locating Logic Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
I’ve Reached My Breaking Point . . . . . . . . . . . . . . . . . . . . . . . . . 108
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Key Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Review Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
CHAPTER 8 Decisions, Decisions, Decisions (Selection Structure) . . . . . .115
Someone Might Need to Make a Decision . . . . . . . . . . . . . . . . . . . . . . 116
Going Beyond Rob’s Problems . . . . . . . . . . . . . . . . . . . . . . . . . . 120
The If…Then…Else Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . 121