Starting out with Visual C#

795 Pages·14.52 MB·English

by  Gaddis, Tony

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Starting Out With Visual C#
FOURTH EDITION
Tony Gaddis
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Starting Out With
Visual C#
®
Fourth Edition
Global Edition
tony gaddis
haywood Community College
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© Pearson Education Limited 2017
The right of Tony Gaddis to be identified as the author of this work has been asserted by him in accordance with the Copyright,
Designs and Patents Act 1988.
Authorized adaptation from the United States edition, entitled Starting Out With Visual C#, 4th Edition, ISBN 978-0-13-438260-9,
by Tony Gaddis published by Pearson Education © 2017.
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British Library Cataloguing-in-Publication Data
A catalogue record for this book is available from the British Library
10 9 8 7 6 5 4 3 2 1
ISBN 10: 1-292-16321-6
ISBN 13: 978-1-292-16321-5
Typeset by iEnergizer Aptara®, Ltd.
Printed and bound by Vivar in Malaysia
Locations of VideoNotes
www.pearsonglobaleditions.com/Gaddis
Chapter 1 tutorial 1-1: Starting Visual Studio and Setting
up the Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
VideoNote
tutorial 1-2: Starting a new Visual C# Project . . . . . . . . . . . . . . 48
tutorial 1-3: Saving and Closing a Project . . . . . . . . . . . . . . . . . 50
tutorial 1-4: Opening an Existing Project . . . . . . . . . . . . . . . . . . 58
tutorial 1-5: getting Familiar with the Visual
Studio Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Chapter 2 tutorial 2-1: Creating the gui for the Hello World application . . . 79
tutorial 2-2: Writing Code for the Hello World application . . . . 93
tutorial 2-3: Creating the Language Translator application . . . 104
tutorial 2-4: Creating the Flags application . . . . . . . . . . . . . . . 112
tutorial 2-5: Creating the Card Flip application . . . . . . . . . . . . 116
Solving the Clickable number images Problem . . . . . . . . . . . . 131
Chapter 3 tutorial 3-1: the Birth Date String application . . . . . . . . . . . . . 144
tutorial 3-2: Calculating Fuel Economy . . . . . . . . . . . . . . . . . . 164
tutorial 3-3: Creating the Sale Price Calculator application
with Currency Formatting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
tutorial 3-4: Creating the Test Average application with
Exception handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
tutorial 3-5: Creating the Change Counter application . . . . . . 187
tutorial 3-6: Single-stepping through an application’s Code
at runtime . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Solving the tip, tax, and total Problem . . . . . . . . . . . . . . . . . . 213
Chapter 4 tutorial 4-1: Completing the Test Score Average application . . 222
tutorial 4-2: Completing the Payroll with Overtime application . 228
tutorial 4-3: Completing the Loan Qualifier application . . . . . 234
tutorial 4-4: Calculating Fuel Economy . . . . . . . . . . . . . . . . . . 257
tutorial 4-5: Creating the Color Theme application . . . . . . . . . 266
tutorial 4-6: Creating the Time Zone application . . . . . . . . . . . 273
Solving the Mass and Weight Problem . . . . . . . . . . . . . . . . . . . 282
Chapter 5 tutorial 5-1: using a Loop to Calculate an account Balance . . . 293
tutorial 5-2: Enhancing the Ending Balance application . . . . . 296
tutorial 5-3: using the for Loop . . . . . . . . . . . . . . . . . . . . . . . . 306
tutorial 5-4: Writing Data to a text File . . . . . . . . . . . . . . . . . . 317
tutorial 5-5: appending Data to the Friend .txt File . . . . . . . . . 322
tutorial 5-6: using a Loop to read to the End of a File . . . . . . . 330
tutorial 5-7: Calculating a running total . . . . . . . . . . . . . . . . . 334
tutorial 5-8: Simulating Coin tosses . . . . . . . . . . . . . . . . . . . . 344
tutorial 5-9: Creating a Load Event handler . . . . . . . . . . . . . . . 349
Solving the Celsius to Fahrenheit table Problem . . . . . . . . . . . 356
3
4 Locations of Videonotes
Chapter 6 tutorial 6-1: Creating and Calling Methods . . . . . . . . . . . . . . . 365
tutorial 6-2: Passing an argument to a Method . . . . . . . . . . . . 372
tutorial 6-3: using an Output Parameter . . . . . . . . . . . . . . . . . 383
tutorial 6-4: Writing a Value-returning Method . . . . . . . . . . . 392
tutorial 6-5: Modularizing input Validation with a
Boolean Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 395
tutorial 6-6: Practicing the Step Into Command . . . . . . . . . . . . 401
tutorial 6-7: Practicing the Step Over Command . . . . . . . . . . . 402
tutorial 6-8: Practicing the Step Out Command . . . . . . . . . . . . 403
Solving the Kinetic Energy Problem . . . . . . . . . . . . . . . . . . . . . 408
Chapter 7 tutorial 7-1: using an array to hold a List of random
Lottery numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423
tutorial 7-2: Processing an array . . . . . . . . . . . . . . . . . . . . . . . 448
tutorial 7-3: Completing the Seating Chart application . . . . . . 463
tutorial 7-4: Completing the Test Score List application . . . . . . 476
Solving the total Sales Problem . . . . . . . . . . . . . . . . . . . . . . . . 486
Chapter 8 tutorial 8-1: Completing the Password Validation application . 495
tutorial 8-2: Completing the Telephone Format application . . 508
tutorial 8-3: Completing the Telephone Unformat application . 512
tutorial 8-4: Completing the CSV Reader application . . . . . . . 518
tutorial 8-5: Completing the Phonebook application . . . . . . . . 533
tutorial 8-6: Completing the Color Spectrum application . . . . 541
tutorial 8-7: Completing the Random Card application . . . . . 548
Solving the Sum of numbers in a String Problem . . . . . . . . . . 555
Chapter 9 tutorial 9-1: Creating and using the Coin Class . . . . . . . . . . . . 566
tutorial 9-2: Creating and using the CellPhone Class . . . . . . . 574
tutorial 9-3: Creating and using the BankAccount Class . . . . . 581
tutorial 9-4: Completing the Cell Phone Inventory application . 589
tutorial 9-5: Creating an application with two Forms . . . . . . 606
tutorial 9-6: accessing a Control on a Different Form . . . . . . . 611
Solving the Pet Class Problem . . . . . . . . . . . . . . . . . . . . . . . . . . 620
Chapter 10 tutorial 10-1: Creating and testing the SavingsAccount and
CDAccount Classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 633
tutorial 10-2: Completing the Polymorphism application . . . . 646
tutorial 10-3: Completing the Computer Science Student
application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 653
Solving the Employee and ProductionWorker
Classes Problem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 661
Chapter 11 tutorial 11-1: Starting the Phone Book application and
Creating the Phonelist .mdf Database . . . . . . . . . . . . . . . . . . . . 669
tutorial 11-2: Completing the Phone Book application . . . . . . 677
tutorial 11-3: Creating the Products application and
using a Details View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 686
tutorial 11-4: Creating the Product Lookup application . . . . . . 697
tutorial 11-5: Creating the Multiform Products application . . . 700
tutorial 11-6: Creating the Product Queries application . . . . . . 712
tutorial 11-7: Creating the Product Queries application . . . . . . 721
tutorial 11-8: Creating the Product Search application . . . . . . 725
Solving the Personnel Database Problem . . . . . . . . . . . . . . . . . 735
Brief Contents
Chapter 1 Introduction to Computers and Programming 19
Chapter 2 Introduction to Visual C# 69
Chapter 3 Processing Data 135
Chapter 4 Making Decisions 217
Chapter 5 Loops, Files, and Random Numbers 287
Chapter 6 Modularizing Your Code with Methods 359
Chapter 7 Arrays and Lists 413
Chapter 8 More About Processing Data 489
Chapter 9 Classes and Multiform Projects 559
Chapter 10 Inheritance and Polymorphism 623
Chapter 11 Databases 663
appendix a C# Primitive Data Types 737
appendix B Additional User Interface Controls 739
appendix C ASCII/Unicode Characters 759
appendix D Answers to Checkpoint Questions 761
Index 781
5
Contents
Preface 11
Attention Students 17
Chapter 1 Introduction to Computers and Programming 19
1 .1 introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
1 .2 hardware and Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
1 .3 how Computers Store Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
1 .4 how a Program Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
1 .5 graphical user interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
1 .6 Objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
1 .7 the Program Development Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
1 .8 getting Started with the Visual Studio Environment . . . . . . . . . . . . . . . . . . 45
TUToRIAL 1-1: Starting Visual Studio and Setting Up the Environment.......... 46
TUToRIAL 1-2: Starting a New Visual C# Project .......................... 48
TUToRIAL 1-3: Saving and Closing a Project.............................. 50
TUToRIAL 1-4: Opening an Existing Project .............................. 58
TUToRIAL 1-5: Getting Familiar with the Visual Studio Environment........... 59
Key Terms 61 • Review Questions 62 • Programming Problems 67
Chapter 2 Introduction to Visual C# 69
2 .1 getting Started with Forms and Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
2 .2 Creating the gui for Your First Visual C# application:
the Hello World application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
TUToRIAL 2-1: Creating the GUI for the Hello World Application ............. 79
2 .3 introduction to C# Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
2 .4 Writing Code for the Hello World application . . . . . . . . . . . . . . . . . . . . . . . . 93
TUToRIAL 2-2: Writing Code for the Hello World Application................ 93
2 .5 Label Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
TUToRIAL 2-3: Creating the Language Translator Application ............... 104
2 .6 Making Sense of intelliSense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
2 .7 PictureBox Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
TUToRIAL 2-4: Creating the Flags Application ........................... 112
TUToRIAL 2-5: Creating the Card Flip Application........................ 116
2 .8 Comments, Blank Lines, and indentation . . . . . . . . . . . . . . . . . . . . . . . . . . 120
2 .9 Writing the Code to Close an application’s Form . . . . . . . . . . . . . . . . . . . . 122
2 .10 Dealing with Syntax Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Key Terms 125 • Review Questions 125 • Programming Problems 130
6
Contents 7
Chapter 3 Processing Data 135
3 .1 reading input with textBox Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
3 .2 a First Look at Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
TUToRIAL 3-1: The Birth Date String Application......................... 144
3 .3 numeric Data types and Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
3 .4 Performing Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
3 .5 inputting and Outputting numeric Values . . . . . . . . . . . . . . . . . . . . . . . . . 159
TUToRIAL 3-2: Calculating Fuel Economy............................... 164
3 .6 Formatting numbers with the ToString Method . . . . . . . . . . . . . . . . . . . . 167
TUToRIAL 3-3: Creating the Sale Price Calculator Application with
Currency Formatting.......................................... 170
3 .7 Simple Exception handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
TUToRIAL 3-4: Creating the Test Average Application with
Exception Handling........................................... 178
3 .8 using named Constants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
3 .9 Declaring Variables as Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
TUToRIAL 3-5: Creating the Change Counter Application................... 187
3 .10 using the Math Class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
3 .11 More gui Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
3 .12 using the Debugger to Locate Logic Errors . . . . . . . . . . . . . . . . . . . . . . . . . 202
TUToRIAL 3-6 Single-stepping through an Application’s Code
at Runtime.................................................. 203
Key Terms 208 • Review Questions 208 • Programming Problems 213
Chapter 4 Making Decisions 217
4 .1 Decision Structures and the if Statement . . . . . . . . . . . . . . . . . . . . . . . . . 217
TUToRIAL 4-1: Completing the Test Score Average Application .............. 222
4 .2 the if-else Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
TUToRIAL 4-2: Completing the Payroll with Overtime Application ........... 228
4 .3 nested Decision Structures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
TUToRIAL 4-3: Completing the Loan Qualifier Application ................. 234
4 .4 Logical Operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
4 .5 bool Variables and Flags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
4 .6 Comparing Strings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
4 .7 Preventing Data Conversion Exceptions with the TryParse
Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252
TUToRIAL 4-4: Calculating Fuel Economy............................... 257
4 .8 input Validation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260
4 .9 radio Buttons and Check Boxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
TUToRIAL 4-5: Creating the Color Theme Application ..................... 266
4 .10 the switch Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268
4 .11 introduction to List Boxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271
TUToRIAL 4-6: Creating the Time Zone Application....................... 273
Key Terms 277 • Review Questions 277 • Programming Problems 281