Mastering Visual Basic .NET: A Comprehensive Guide

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"Visual Studio .NET Mastering Visual Basic (VBL)" 是一本深入学习VB.NET编程的书籍，涵盖了从基础知识到高级技术的广泛内容。这本书分为六个部分，旨在帮助读者全面掌握Visual Studio .NET下的Visual Basic开发技能。第一部分是基础篇，包括了VB.NET的入门、项目管理以及VB.NET语言的基础知识。第1章介绍了如何开始使用VB.NET，第2章讲解了VB.NET项目结构，第3章则深入讨论了VB.NET的语言特性。第二部分着重于自定义对象的创建，如第8章讲解如何构建自定义类，第9章介绍定制Windows控件，第10章则涉及自动化Microsoft Office应用程序的开发。第三部分涉及基础框架类的应用，如第11章阐述了数据在集合中的存储，第12章讲解了处理字符串、字符和日期的方法，而第13章则涵盖了对文件和文件夹的操作。第四部分为进阶编程，包括了第14章的绘图与绘画，第15章的VB.NET打印功能，第16章的TreeView和ListView控件的使用，第17章的错误处理和调试，第18章的递归编程，以及第19章的多文档界面（MDI）设计。第五部分是数据库编程，第20章介绍了数据库架构和基本概念，第21章展示了如何用ADO.NET构建数据库应用，第22章则详细解析了ADO.NET对象的编程。第六部分关注VB.NET在Web开发中的应用，第23章为Web编程的入门，第24章讨论了如何在Web上访问数据，第25章则涵盖了XML Web服务的开发。此外，书中还提供了索引以便快速查找特定内容，且附带的电子书功能支持使用Adobe Acrobat Reader进行搜索，方便读者高效学习和查阅。这本书为VB.NET程序员提供了一个全面的学习路径，从基础语法到高级特性的实现，再到数据库和Web开发，覆盖了VB.NET编程的各个方面。通过阅读和实践，读者可以系统地提升自己的VB.NET编程能力。

So, what’s the distinction between Visual Studio .NET and the language? Visual Studio .NET is

the environment that provides all the necessary tools for developing applications. The language is

only one aspect of a Windows application. The visual interface of the application isn’t tied to a spe-

cific language, and the same tools you’ll use to develop your application’s interface will also be used

by all programmers, regardless of the language they’ll use to code the application.

The tools you’ll use to access databases are also independent of the language. Visual Studio pro-

vides tools that allow you to connect to a database, inspect its objects, retrieve the information you’re

interested in, and even store it in objects that can be accessed from within any language.

There are many visual tools in the IDE, like the Menu Designer. This tool allows you to visually

design menus and to set their names and basic properties (such as checking, enabling, or disabling

certain options). Designing a menu doesn’t involve any code, and it’s carried out with point-and-

click operations. Of course, you will have to insert some code behind the commands of your menus,

and (again) you can use any language to program them.

To simplify the process of application development, Visual Studio .NET provides an environment

that’s common to all languages, which is known as integrated development environment (IDE). The purpose

of the IDE is to enable the developer to do as much as possible with visual tools, before writing code.

The IDE provides tools for designing, executing, and debugging your applications. It’s your second

desktop, and you’ll be spending most of your productive hours in this environment.

The Start Page

When you run Visual Studio for the first time, you will see the window shown in Figure 1.1. On the

My Profile tab, you will set your personal preferences by specifying your language. Select Visual

Basic Developer in the Profile box, and the other two boxes will be filled automatically. You can

leave the other fields to their default values. The ComboBox control at the bottom of the page, the

At Startup control, is where you define what you want Visual Studio .NET to do when it starts.

The choices are the following:

Show Start Page Every time you start Visual Studio .NET, this page will appear.

Load Last Loaded Solution Once you start working on a real project (a project that will take

you from a few days to a few months to complete), select this option so that the project will be

loaded automatically every time you start Visual Studio .NET.

Show Open Project Dialog Box Every time you start Visual Studio .NET, the Open Project

dialog box will appear, where you can select a project to open.

Show New Project Dialog Box Every time you start Visual Studio .NET, the New Project

dialog box will appear, where you can specify the name of a new project—a setting to avoid.

Show Empty Environment This option instructs Visual Studio .NET to start a new empty

solution, and you’re responsible for adding new or existing projects to the solution and new or

existing items to a project.

The actions are self-explanatory, and the most common setting is to show the Start Page. The

Start Page displays the four most recently opened projects, as well as the New Project and Open

Project buttons. To see the Start Page, select the Get Started option.

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template, and Visual Studio will suggest the name WindowsApplication1 as the project name. Change

it to MyTestApplication. Under the project’s name is another box, named Location. This is the folder

in which the new project will be created (every project is stored in its own folder). Visual Studio will

create a new folder under the one specified in the Location box and will name it after the project. You

can leave the default project folder and click the OK button.

VB6

➠

VB.NET

Unlike previous versions of Visual Basic, Visual Basic .NET creates a new folder for the project and saves

the project’s files there, even before you edit them. The IDE saves the changes to the project’s files by default

every time you run the project. To change this behavior, use the Tools

➢

Options dialog box, which is

described later in this book.

What you see now is the Visual Studio IDE displaying the Form Designer for a new project

(Figure 1.3). The main window is the Form Designer, and the gray surface on it is the window of

your new application in design mode. Using the Form Designer, you’ll be able to design the visible

interface of the application (place various components of the Windows interface on the form) and

then program the application.

The default environment is rather crowded, so let’s hide a few of the toolbars we’re not going to

use in the projects of the first few chapters. You can always show any of the toolbars at any time.

Open the View menu and select Toolbars. You will see a submenu with 28 commands, which are

toggles. Each command corresponds to a toolbar, and you can turn the corresponding toolbar on or

off by clicking one of the commands in the Toolbar submenu. Turn off all the toolbars except for

the Layout and Standard toolbars.

The last item in the Toolbars submenu is the Customize command, which leads to a dialog box

where you can specify which of the toolbars and which of the commands you want to see.

Figure 1.2

The New Project

dialog box

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