Visual Basic 2008 入门教程：从基础到精通

VisualBasic2008

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Visual Basic 2008 从入门到精通 Visual Basic 2008 是一个功能强大且流行的编程语言，它由 Microsoft 公司开发和维护。Visual Basic 2008 是 Visual Basic 家族中的一员，它继承了 Visual Basic 的传统，同时也引入了许多新的特性和功能。Visual Basic 2008 的主要特点是简单易学、功能强大、开发效率高、可移植性强等。本书《Visual Basic 2008 从入门到精通》是 Visual Basic 2008 的入门级别教材，旨在帮助初学者快速掌握 Visual Basic 2008 的基本技能和高级技能。该书涵盖了 Visual Basic 2008 的所有方面，包括基本语法、控件使用、数据库编程、网页开发、Windows 应用程序开发等。 Visual Basic 2008 的基本语法包括变量声明、数据类型、运算符、控制结构、函数和过程等。这些基本语法是编写 Visual Basic 2008 程序的基础，理解和掌握这些语法是非常重要的。控件是 Visual Basic 2008 中的一个重要组件，控件可以使用户界面更加友好和美观。常用的控件包括 Label、TextBox、Button、CheckBox、RadioButton、ListBox、ComboBox 等。这些控件可以用来创建复杂的用户界面，并且可以通过编程来控制它们的行为。数据库编程是 Visual Basic 2008 的一个重要应用领域。Visual Basic 2008 可以与多种数据库管理系统集成，例如 Microsoft Access、Microsoft SQL Server、Oracle 等。通过使用 ADO.NET，可以轻松地访问和操作数据库。网页开发是 Visual Basic 2008 的另一个重要应用领域。Visual Basic 2008 可以与 ASP.NET 集成，创建动态的网页应用程序。ASP.NET 是一个基于 Web 的应用程序框架，提供了许多功能强大且灵活的组件和工具，可以用来创建复杂的网页应用程序。 Windows 应用程序开发是 Visual Basic 2008 的一个传统应用领域。Visual Basic 2008 可以用来创建 Windows 桌面应用程序，例如文本编辑器、图像编辑器、游戏等。这些应用程序可以使用 Windows API、COM 组件和 .NET Framework 等技术来实现。《Visual Basic 2008 从入门到精通》是一本非常实用的教材，适合初学者和经验丰富的开发者。通过学习这本书，读者可以快速掌握 Visual Basic 2008 的基本技能和高级技能，从而成为一名优秀的 Visual Basic 2008 开发者。此外，本书还提供了许多有用的资源，例如代码示例、图表、截图等，可以帮助读者更好地理解和掌握 Visual Basic 2008 的知识。《Visual Basic 2008 从入门到精通》是 Visual Basic 2008 的一个非常有价值的资源，适合所有想要学习 Visual Basic 2008 的人。

xvi Table of Contents

Appendix

Where to Go for More Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 525

Visual Basic Web Sites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 525

Books About Visual Basic and Visual Studio Programming . . . . . . . . . . . . . . . 527

Visual Basic Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 527

Microsoft .NET Framework. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 527

Database Programming with ADO.NET . . . . . . . . . . . . . . . . . . . . . . . . . . . 528

Web Programming with ASP.NET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 528

Visual Basic for Applications Programming. . . . . . . . . . . . . . . . . . . . . . . . 528

General Books about Programming and Computer Science . . . . . . . . . 529

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 531

About the Author. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 545

Microsoft is interested in hearing your feedback so we can continually improve our books and learning

resources for you. To participate in a brief online survey, please visit:

www.microsoft.com/learning/booksurvey/

What do you think of this book? We want to hear from you!

xvii

Introduction

I’m really glad that you’ve chosen this book to learn essential Microsoft Visual Basic 2008

programming skills and techniques. Although we’re meeting for the ﬁ rst time in this para-

graph, the chances are that we’re not all that different. I work with a computer every day and

I spend a lot of time helping friends and colleagues make their lives better (or at least more

efﬁ cient!) with new software and related technologies. Over the years, I have learned dozens

of computer applications, languages, and tools, and I have a knack for weaving them together

to solve real-world business problems. You’re probably the same—the go-to tech person

in your ofﬁ ce, school, or home—which is why you’re now needing to learn, or upgrade to,

Visual Basic 2008—one of the most powerful development tools in use today.

Microsoft Visual Basic 2008 Step by Step is a comprehensive introduction to Visual Basic

programming using the Microsoft Visual Basic 2008 software. I’ve designed this practical,

hands-on tutorial with a variety of skill levels in mind. The result is that new programmers

can learn software development fundamentals in the context of useful, real-world applica-

tions, and experienced Visual Basic programmers can quickly master the essential tools and

programming techniques offered in the Visual Basic 2008 upgrade.

Complementing this comprehensive approach is the book’s structure—4 topically organized

parts, 20 chapters, and 53 step-by-step exercises and sample programs. By using this book,

you’ll quickly learn how to create professional-quality Visual Basic 2008 applications for the

Windows operating system and a variety of Web browsers. You’ll also have fun!

What Is Visual Basic 2008?

Visual Basic 2008 is a development tool that you can use to build software applications

that perform useful work and look great within a variety of settings. Using Visual Basic

2008, you can create applications for the Windows operating system, the Web, hand-held

devices, and a host of other environments and settings. The most important advantage

of Visual Basic is that it has been designed to increase productivity in your daily development

work—especially if you need to use information in databases or create solutions for the

Internet—but an important additional beneﬁ t is that once you become comfortable with

the development environment in Microsoft Visual Studio 2008, you can use the same tools

to write programs for Microsoft Visual C++ 2008, Microsoft Visual C# 2008, Microsoft Visual

Web Developer 2008, and other third-party tools and compilers.

xviii Introduction

Visual Basic .NET Versions

So how did we get here, anyway? The ﬁ rst version of Visual Basic .NET (Microsoft Visual

Basic .NET 2002) was released in February 2002. The second release (Microsoft Visual Basic

.NET 2003) was widely available in March 2003. Next came Visual Basic 2005 in late 2005,

and after a long period of development and integration work, Microsoft released Visual

Basic 2008 in early 2008. Visual Basic 2008 is now so tightly integrated with Visual Studio

that it is only available as a component in the Visual Studio 2008 programming suite,

which includes Visual C#, Visual C++, Visual Web Developer, and other Microsoft .NET

development tools.

Visual Studio 2008 is sold in several different product conﬁ gurations, including Standard

Edition, Professional Edition, Team Suite, and Express Edition. I’ve written this book to be

compatible with all editions of Visual Basic 2008 and Visual Studio 2008, but especially

with the tools and techniques available in Visual Studio Standard Edition and Visual Studio

Professional Edition. Although Visual Basic 2008 is similar in many ways to Visual Basic 2005,

there are many important differences and improvements, so I recommend that you complete

the exercises in this book using the Visual Basic 2008 software.

Note

The Visual Basic 2008 software is not included with this book! The CD distributed with

most versions of this book contains practice ﬁ les, sample databases, and other useful information

that requires the Visual Basic 2008 software (sold separately) for use.

Upgrading from Microsoft Visual Basic 6.0

Before Visual Basic .NET, of course, the programming world was blessed to have Visual Basic

6, originally released ten years ago in September 1998. Visual Basic 6 was so popular that

many programming enthusiasts continue to use it, especially developers outside of Europe

and North America, where hardware upgrades can be a little harder to come by. (For those

of you Visual Basic 6 users who have written me letters from Africa and Asia, thank you!) In

some respects, I can’t blame you—Visual Basic 6 was and is awesome for its ease-of-use and

straightforward programming methods. But, as many of us know now, Visual Basic 6 also

made creating real professional-grade applications a bit of a chore. As a result, I always felt

like I had a speed and size complex when I chatted with friends who wrote about their fast

and tiny-footprint Visual C++ programs. To write really complex Visual Basic 6 applications,

I usually had to jump through a number of hoops.

Introduction xix

Ten years down the road, Visual Basic 2008 makes it much, much easier to write professional-

grade Windows- and Internet-based applications that compete on an equal playing ﬁ eld

with Visual C++, Visual C#, and Java applications. And the beauty of Visual Basic is that it is

much easier to learn than other programming tools. Although there are a few speed bumps,

upgrading from Visual Basic 6 to Visual Basic 2008 is quite straightforward. Visual Studio

2008 offers an upgrade wizard that begins the conversion process for you, and you’ll ﬁ nd

that many of the legacy controls, statements, functions, methods, and properties that you’ve

learned to use are still a part of Visual Basic 2008.

In this book I offer upgrade notes for readers who are upgrading from Visual Basic 6

because I get it: I was once a Visual Basic 6 programmer and I know what it feels like to

upgrade programs to Visual Basic .NET. So as you read this book, you’ll see a comment

now and then about how syntax or conceptual paradigms have changed, and how you

can use what you know to become a solid Visual Basic 2008 programmer. And believe

me, you want this qualiﬁ cation on your resumé.

And here’s a message for all programmers: I encourage you to assess where your overall

development skills are, and not focus only on the newest features of a programming lan-

guage that you are preparing to learn. Underlying skills, such as working with algorithms,

data structures, object-oriented programming, and debugging skills, will help you to write

better programs. For this reason, it might be just as important for you to fully understand

user-interface design and database management techniques, as it is to learn the newest

switches for a particular feature that you read about in the press. It is here that Visual Basic

6 developers want to assess and take forward all that they know about software develop-

ment. The tools change but the underlying skills often remain the same.

Finding Your Best Starting Point in This Book

This book is designed to help you build skills in a number of essential areas. You can use it if

you’re new to programming, switching from another programming language, or upgrading

from Visual Basic 6 or Visual Basic 2005. Use the table on the following page to ﬁ nd your best

starting point in this book.

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