Visual Basic 2010精通：构建.NET Framework应用

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"Mastering Microsoft Visual Basic 2010英文版"是一本深入浅出的中级教程，专为学习和掌握Visual Basic .NET 2010编程语言而设计。本书针对的是一个重要的软件开发里程碑，尤其是在Windows和Web应用开发领域，Visual Basic因其广泛的应用而备受青睐。在现代软件开发中，Visual Basic的核心并非仅仅是语言本身，而是.NET Framework，它扮演着至关重要的角色。.NET Framework 4.0是一个强大的开发平台，提供了丰富的函数库和工具集，几乎涵盖了所有编程任务的需求。例如，对于图形处理，所有的绘图方法都位于System.Drawing类中，开发者可以通过调用DrawRectangle方法来绘制矩形。创建新文件夹则通过Directory类的CreateDirectory方法，获取文件则使用GetFiles方法。本书将引导读者学习如何使用Visual Basic 2010构建功能丰富的客户端和Web应用程序，强调了与.NET Framework的紧密集成。读者将不仅掌握基础语法和编程技巧，还将学会如何利用框架提供的各种类库和组件来优化代码，提高效率。此外，书中还会涉及设计模式、错误处理、数据库操作以及网络通信等相关主题，确保读者能够全面理解并应用该技术。作者Evangelos Petroutsos以其丰富的经验和深入浅出的讲解，为读者呈现了一个完整的Visual Basic 2010学习路径。无论是初学者还是进阶开发者，都能从中受益匪浅。版权信息表明，这本书由Wiley Publishing, Inc.出版，并遵循严格的版权规定，确保知识的合法传播和保护。通过阅读这本书，读者将提升对Visual Basic 2010的熟练程度，具备开发高质量、高性能应用的能力，同时了解如何利用.NET Framework这个强大的开发工具箱，从而在软件开发行业中取得竞争优势。

xiv CONTENTS

Arrays ..............................................................75

Declaring Arrays .................................................... 75

Initializing Arrays ...................................................76

Multidimensional Arrays .............................................78

Collections ........................................................81

The Bottom Line ......................................................82

Chapter 3

•

Visual Basic Programming Essentials ...................85

Flow-Control Statements ................................................85

Decision Statements ................................................86

Loop Statements ....................................................93

Nested Control Structures ............................................99

The Exit and Continue Statements .................................... 102

Writing and Using Procedures .......................................... 102

Subroutines ....................................................... 103

Functions ........................................................ 104

Arguments .......................................................... 106

Argument-Passing Mechanisms ....................................... 108

Built-in Functions .................................................. 111

Custom Functions .................................................. 113

Passing Arguments and Returning Values ............................... 115

Overloading Functions .............................................. 118

The Bottom Line ..................................................... 125

Part 2

•

Developing Windows Applications ............................. 127

Chapter 4

•

GUI Design and Event-Driven Programming .............. 129

On Designing Windows Applications ..................................... 129

Building a Loan Calculator ............................................. 130

Understanding How the Loan Calculator Application Works ................ 131

Designing the User Interface ......................................... 133

Programming the Loan Application .................................... 136

Validating the Data ................................................. 140

Building a Calculator .................................................. 144

Designing the User Interface ......................................... 145

Programming the MathCalculator ..................................... 147

Using the Basic Debugging Tools ...................................... 152

Exception Handling ................................................ 155

The Bottom Line ..................................................... 158

Chapter 5

•

Basic W indows Controls ...................... ...... 161

The TextBox Control .................................................. 161

Basic Properties .................................................... 162

Text-Manipulation Properties ......................................... 165

Text-Selection Properties ............................................ 167

Undoing Edits ..................................................... 168

VB 2010 at Work: The TextPad Project .................................. 168

CONTENTS xv

Capturing Keystrokes ............................................... 176

Autocomplete Properties ............................................ 179

The ListBox, CheckedListBox, and ComboBox Controls ....................... 182

Basic Properties .................................................... 183

Manipulating the Items Collection ..................................... 184

Selecting Items .................................................... 187

VB 2010 at Work: The ListBox Demo Project ............................. 188

Searching the ListBox ............................................... 191

The ComboBox Control ............................................. 193

The ScrollBar and TrackBar Controls ..................................... 197

The ScrollBar Control ............................................... 197

The TrackBar Control ............................................... 200

The Bottom Line ..................................................... 201

Chapter 6

•

Working with Forms ............ .................. 203

The Appearance of Forms .............................................. 203

Properties of the Form Object ......................................... 204

Placing Controls on Forms ........................................... 209

Setting the TabIndex Property ........................................ 211

VB 2010 at Work: The Contacts Project .................................. 212

Anchoring and Docking ............................................. 216

Splitting Forms into Multiple Panes .................................... 219

Form Events ...................................................... 221

Loading and Showing Forms ........................................... 223

The Startup Form .................................................. 224

Controlling One Form from within Another ............................. 225

Forms versus Dialog Boxes ........................................... 226

Building Dynamic Forms at Runtime ..................................... 233

The Form’s Controls Collection ...................................... 234

Creating Event Handlers at Runtime ................................... 241

Designing Menus ..................................................... 243

The Menu Editor ................................................... 243

The ToolStripMenuItem Properties .................................... 246

Manipulating Menus at Runtime ...................................... 248

The Bottom Line ..................................................... 251

Chapter 7

•

More Windows Controls ............................ 253

The Common Dialog Controls ........................................... 254

Using the Common Dialog Controls ................................... 255

The ColorDialog Control ............................................ 256

The FontDialog Control ............................................. 258

The OpenDialog and SaveDialog Controls ............................... 261

The FolderBrowserDialog Control ..................................... 266

The RichTextBox Control ............................................... 269

The RTF Language ................................................. 270

Text Manipulation and Formatting Properties ............................ 271

Methods ......................................................... 274

xvi CONTENTS

Advanced Editing Features .......................................... 275

Cutting, Copying, and Pasting ........................................ 276

VB 2010 at Work: The RTFPad Project .................................. 277

The T reeView and ListView Controls ..................................... 286

Tree and List Structures ............................................. 287

The TreeView Control .............................................. 289

The ListView Control ............................................... 293

VB 2010 at Work: The CustomExplorer Project ........................... 299

The Bottom Line ..................................................... 300

Part 3

•

Working with Custom Classes and Controls ....................... 303

Chapter 8

•

Working with Objects ....................... ...... 305

Classes and Objects ................................................... 305

What Is a Class? ...................................................... 306

Classes Combine Code with Data ...................................... 307

Building the Minimal Class ............................................. 308

Adding Code to the Minimal Class .................................... 311

Using Property Procedures ........................................... 313

Customizing Default Members ........................................ 320

Custom Enumerations .............................................. 323

Object Constructors ................................................ 331

Using the SimpleClass in Other Projects ................................ 333

Firing Events ...................................................... 335

Instance and Shared Met hods ......................................... 338

A ‘‘Real’’ Class ....................................................... 342

Nesting Classes .................................................... 344

Operator Overloading ................................................. 347

VB 2010 at Work: The LengthUnits Class ................................ 348

The Bottom Line ..................................................... 353

Chapter 9

•

Building Custom Windows Controls ................... 355

On Designing Windows Controls ........................................ 355

Enhancing Existing Controls ............................................ 356

Building the FocusedTextBox Control .................................. 357

Building Compound Controls ........................................... 364

VB 2010 at Work: The ColorEdit Control ................................ 365

Building User-Drawn Controls .......................................... 368

VB 2010 at Work: The Label3D Control ................................. 369

Raising Custom Events .............................................. 377

Using the Custom Control in Other Projects ............................. 378

Designing Irregularly Shaped Controls .................................... 379

Customizing List Controls .............................................. 382

Designing Owner-Drawn ListBox Controls .............................. 383

The Bottom Line ..................................................... 385

CONTENTS xvii

Chapter 10

•

Applied Object-Oriented Programming ................ 387

Issues in Object-Oriented Programming ................................... 387

Classes versus Objects .............................................. 387

Objects versus Object Variables ....................................... 388

Properties versus Fields ............................................. 395

Shared versus Instance Members ...................................... 395

Type Casting ...................................................... 397

Early versus Late Binding ............................................ 398

Discovering a Variable’s Type ........................................ 399

Inheritance .......................................................... 400

How to Apply Inheritance ........................................... 401

Designing with Inheritance .......................................... 402

Extension Methods ................................................... 407

Polymorphism ....................................................... 411

Building the Shape Class ............................................ 413

Who Can Inherit What? ................................................ 418

Parent Class Keywords .............................................. 418

Derived Class Keywords ............................................ 419

Parent Class Member Keywords ...................................... 419

Derived Class Member Keyword ...................................... 420

VB 2010 At Work: T he InheritanceKeywords Project ....................... 420

MyBase and MyClass ................................................ 422

Putting Inheritance to Work .......................................... 423

The Class Diagram Designer ......................................... 429

The Bottom Line ..................................................... 430

Part 4

•

Working with the .NET Framework ............................. 431

Chapter 11

•

The Framework at Large ........................... 433

What Is the Framework? ............................................... 433

Using Snippets ....................................................... 434

Using the My Component ............................................... 436

How to Use the My Component ....................................... 439

The IO Namespace .................................................... 440

The D irectory Class ................................................. 441

The File Class ..................................................... 442

The DriveInfo Class ................................................ 442

The D irectoryInfo Class ............................................. 443

The Path Class .................................................... 444

Streaming Data .................................................... 445

Drawing and Painting ................................................. 446

Drawing Methods .................................................. 449

Gradients ........................................................ 453

The Image Class ...................................................... 454

xviii CONTENTS

Printing ............................................................ 455

The PrintDocument Control .......................................... 455

The PrintDialog Control ............................................. 457

The PageSetupDialog Control ........................................ 457

The PrintPreviewDialog Control ...................................... 458

Page Geometry .................................................... 458

Basic Printing Methods .............................................. 459

VB 2010 at Work: Generating a Simple Printout ........................... 460

Handling Strings and Characters ........................................ 463

The Char Class .................................................... 463

The String Class ................................................... 466

The StringBuilder Class ............................................. 472

Handling Dates and Time .............................................. 476

The DateTime Class ................................................ 476

The TimeSpan Class ................................................ 485

The StopWatch Class ............................................... 489

The Bottom Line ..................................................... 490

Chapter 12

•

Storing Data in Collections ......................... 493

Advanced Array Topics ................................................ 493

Sorting Arrays ..................................................... 494

Searching Arrays .................................................. 495

Performing Other Array Operations ................................... 498

Collection Types ..................................................... 500

Creating Collections ................................................ 501

Sorting Lists ...................................................... 507

Searching Lists .................................................... 508

Iterating Through a List ............................................. 509

The Dictionary Collection .............................................. 510

The HashTable Collection .............................................. 512

VB 2010 at Work: The WordFrequencies Project .......................... 513

The SortedList Collection .............................................. 518

Other Collections ..................................................... 519

The IEnumerator and IComparer Interfaces ................................ 519

Enumerating Collections ............................................ 520

Custom Sorting .................................................... 522

The Bottom Line ..................................................... 528

Chapter 13

•

XML in Modern Programming ....................... 529

A Very Quick Introduction to XML ....................................... 530

XML Schema ...................................................... 534

Numbers and Dates in XML .......................................... 537

Manipulating XML with VB ............................................ 538

XML as a Data Type ................................................ 540

Saving and Loading XML Documents .................................. 542

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