ASP.NET 2.0 XML编程权威指南

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"ASP.NET v2.0 XML编程指南(PDF)" 是一本由Thiru Thangarathinam编写的英文书籍，由Wiley Publishing, Inc.出版。这本书详细介绍了如何在ASP.NET 2.0框架下进行XML编程，旨在帮助开发者掌握XML在Web应用程序中的应用。在ASP.NET 2.0中，XML（eXtensible Markup Language）是一种重要的数据交换和存储格式，它被广泛用于数据传输、配置文件、以及与各种服务（如Web服务）的交互。本书涵盖了以下关键知识点： 1. **XML基础**：书中会讲解XML的基本语法，包括元素、属性、命名空间、注释和处理指令，以及XML文档结构。同时，还会介绍XML文档类型定义（DTD）和XML Schema，它们用于验证XML文档的结构和数据。 2. **LINQ to XML**：ASP.NET 2.0引入了Language Integrated Query (LINQ) 技术，使得查询XML数据更加直观和高效。本书将详细介绍如何使用LINQ to XML来创建、读取和操作XML文档。 3. **XPath和XSLT**：XPath是用于导航XML文档的查询语言，而XSLT则用于转换XML数据。读者将学习如何使用这两项技术来查找和变换XML数据。 4. **XML序列化**：了解如何通过.NET Framework将对象序列化为XML，以及反序列化XML回对象，这对于在不同系统间传递数据至关重要。 5. **ASP.NET中的XML Web Services**：书中有专门章节讲述如何创建和使用XML Web Services，这是ASP.NET 2.0中用于实现分布式计算的关键技术。 6. **配置文件**：ASP.NET 2.0的配置系统大量使用XML，读者将学习如何管理和修改配置文件以适应应用程序需求。 7. **ADO.NET与XML**：探讨如何利用ADO.NET数据提供程序与XML数据源进行交互，包括数据集（DataSet）和数据适配器（DataAdapter）如何处理XML数据。 8. **XML DOM和SAX解析器**：解释两种主要的XML解析方式，即DOM（文档对象模型）和SAX（简单API for XML），以及在不同场景下选择哪种解析方法更合适。 9. **XMLHttpRequest与AJAX**：讨论XMLHttpRequest对象在创建异步JavaScript和XML（AJAX）应用程序中的作用，以及如何在ASP.NET 2.0中实现无刷新页面更新。 10. **实践案例**：书中可能会包含实际的项目示例，帮助读者将理论知识应用于实践中，提升XML编程技能。 "ASP.NET v2.0 XML编程指南"是一本深入浅出的教程，它为开发者提供了全面的XML编程技术，对于想要在ASP.NET 2.0环境中充分利用XML功能的开发人员来说，是一本宝贵的参考书籍。

Acknowledgments

I would like to acknowledge my wife Thamiya, my parents and my family for their constant support

and encouragement throughout while I spent nights and weekends working on this book.

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Introduction

This book will cover the intersection between two great technologies: ASP.NET and XML.

XML has been a hot topic for some time. The massive industry acceptance of this W3C Recommendation,

which allows data communication and information storage in a platform independent manner, has been

astounding. XML is seen and used everywhere—from the display of data on various browsers using the

transformation language XSLT, to the transport of messages between Web services using SOAP.

.NET is Microsoft’s evolutionary and much vaunted new vision. It allows programming of applications

in a language independent manner, the sharing of code between languages, self-describing classes, and

self-documenting program code to name but a few of its capabilities. .NET, in particular ASP.NET, has

been specifically designed with Web services and ease of development in mind. With the release of .NET

2.0 Framework, .NET includes significant enhancements to all areas of ASP.NET. For Web page develop-

ment, new XML data controls like XmlDataSource, and TreeView make it possible to display and edit

data on an ASP.NET Web page without writing code reducing the required amount of code by as much

as 70% in some cases. ADO.NET 2.0 includes many new features that allow you to leverage the new

XML features introduced with SQL Server 2005 (the next major release of SQL Server).

To achieve this exciting new Web programming environment, Microsoft has made extensive use of XML.

In fact, no other technology is so tightly bound with ASP.NET as XML. It is used as the universal data

format for everything from configuration files to metadata, Web Services communication, and object

serialization. All the XML capabilities in the System.Xml namespace were significantly enhanced for

added performance and standards support. The new model for processing in-memory XML data,

editable XPathNavigator, new XSLT processor, strong typed support for XmlReader, and XmlWriter

classes, are some of the key XML related improvements. Connected to this is the new support for XML

that ADO.NET 2.0 has. Because of the new ADO.NET 2.0 features, the programmer now has the ability

to access and update data in both hierarchical XML and relational database form at the same time.

Who This Book Is For

This book is aimed at intermediate or experienced programmers who have started on their journey

toward ASP.NET development and who are already familiar with XML. While I do introduce the reader

to many new ASP.NET 2.0 concepts in Chapter 2, this book is not intended as a first port of call for the

developer looking at ASP.NET, since there are already many books and articles covering this area.

Instead, I cut straight to the heart of using XML within ASP.NET Web applications. To get the most out

of the book, you will have some basic knowledge of C#. All the code examples will be explained in C#.

In a similar vein, there are many books and articles that cover the XML technologies that you will need

to use this book. I assume a general knowledge of XML, namespaces, and XSLT, and a basic understand-

ing of XML schemas.

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What This Book Covers

This book explores the array of XML features and how they can be used in ASP.NET for developing Web

applications. XML is everywhere in the .NET Framework, from serialization to Web services, and from

data access to configuration. In the first part of this book, you’ll find in-depth coverage of the key classes

that implement XML in the .NET platform. Readers and writers, validation, schemas, and XML DOM are

discussed with ASP.NET samples and reference information. Next the book moves on to XPath and XSL

Transformations (XSLT), XML support in ADO.NET and the use of XML for data display.

The final part of this book focuses on SQL Server 2005 XML Features, XML Serialization, XML Web

services, and touches on XML based configuration files and its XML extensions. You’ll also find a couple

of case studies on the use of XML related features of ASP.NET and Web services that provide you with a

real life example on how to leverage these features.

How This Book Is Structured

The book consists of 15 chapters including two case studies. The book is structured to walk the reader

through the process of XML development in ASP.NET 2.0. I take a focused approach, teaching readers

only what they need at each stage without using an excessive level of ancillary detail, overly complex

technical jargon, or unnecessary digressions into detailed discussion of specifications and standards. A

brief explanation of each of the chapters is as follows:

An Introduction to XML

XML finds several applications in business and, increasingly, in everyday life. It provides a common

data format for companies that want to exchange documents using Web services. This chapter is about

XML as a language and its related technologies. The XML technologies that I will specifically introduce

in this chapter are: XML document elements, namespaces, entities, DTD, XDR, XSD, XSD schema data

types, XSLT, XML DOM, XPath, SAX, XLink, XPointer, and XQuery.

An Introduction to ASP.NET 2.0

In Chapter 2, I aim to give the reader an overview of the new features of ASP.NET 2.0. I will highlight

the new ASP.NET page architecture, new data controls, and code sharing features. I ask, “What is master

pages” and go on to talk about how master pages and themes aid in creating consistent Web sites. Later

on, I look at security controls and Web parts framework and illustrate how ASP.NET 2.0 enables 70%

code reduction. Finally, I will look at the new caching and administration and management functionali-

ties of ASP.NET 2.0.

XML Classes in the .NET Framework

In Chapter 3, I take a brisk walk through all the new XML classes in the .NET Framework, which will be

discussed in more detail throughout the rest of the book.

Microsoft has introduced several new applications of XML in .NET 2.0 and has also done some innova-

tive work to improve the core XML API. I start with a discussion on the use of XML in configuration

files, DOM, XSD schema validation, XSLT transformations, XML serialization, Web services, and XML

Introduction

xviii

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support in ADO.NET and look at the namespaces and classes that are available for this purpose. I will

also illustrate the new ASP.NET configuration enhancements and take a quick look at the configuration

classes in .NET Framework 2.0.

Reading and Writing XML

Chapter 4 starts a section of chapters (4 through 6) that look at the functionality contained within the

System.Xml in more detail.

In particular, here I look at the fast, forward-only read-only mechanisms provided by the .NET

Framework for reading and writing XML documents, namely the XmlReader and XmlWriter classes. I

explore the new XML reading and writing model and talk about the various ways using, which you can

read and write XML data. I also go onto discuss node order, parsing attributes, customizing reader and

writer settings, white spaces handling, and namespace handling, and other namespace support.

Validating XML

In Chapter 5, I take a look at different options for the XML validation grammars: DTDs, XDR schemas,

and XSD schemas. I also go on to look at all the ways you can create an XSD schema in Visual Studio

2005: using the XML designer, from a DTD, using the XSD generator, from an XML document, from an

XDR schema, or from an assembly. I also discuss the schema object and see how to link XML documents to

DTDs, XDR schemas, and XSD schemas, and how to then perform validation using the XmlReaderSettings

in conjunction with the XmlReader class. I also illustrate the use of the XmlSchemaSet class to keep a cache

of schemas in memory, to optimize performance, and also deal with unqualified/namespace-qualified con-

tent in XML documents.

XML DOM Object Model

In Chapter 6, I look at the DOM functionality within the .NET Framework provided within the System.Xml

namespace of classes. I look at programmatically creating XML documents, opening documents from

URLs, or strings in memory, and searching and accessing the contents of these documents, before serializ-

ing them back out to XML strings. I also take a look at the differences between the XmlDocument object

and the XmlReader and XmlWriter classes, and where using each is more appropriate. Finally, I demon-

strate the XPath capabilities of the XmlDocument class and also highlight the new editing capabilities of

the XPathNavigator class to modify an XML document in memory.

Transforming XML Data with XSLT

The .NET Framework provides robust support for XSLT and XPath processing and with .NET

Framework 2.0, the XSL support has been completely redesigned and a new XSLT processor is intro-

duced. In Chapter 7, I look at the technologies used for XSL transformations in the .NET Framework,

namely the System.Xml.Xsl namespace, and System.Xml.XPath namespaces, as well as the newly intro-

duced XslCompiledTransform class. The .NET Framework fully supports the XSLT and XPath specifica-

tion as defined by the W3C, but also provides more helpful extensions to these specifications, which

enhance the usability of style sheets within .NET applications. To this end, I look at using embedded

script with <msxsl:script> for transforming XML documents and show how to extend style sheets with

extension objects. Towards the end of the chapter, I discuss advanced XSLT operations such as how to

pass a node set to a style sheet and how to resolve external style sheets using XmlResolver.

Introduction

xix

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