book

.NET & XML

by Niel M. Bornstein

November 2003

Intermediate to advanced

476 pages

14h 38m

English

O'Reilly Media, Inc.

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2.2.3.1. XmlTextReader2.2.3.2. XmlValidatingReader2.2.3.3. XmlNodeReader
3.1.1.1. File access and permissions3.1.1.2. Encodings and StreamWriter
3.1.2.1. Writing data with Sockets3.1.2.2. Writing data with WebRequest
4.1.2.1. Writing the skeleton4.1.2.2. Defining the PYX traversal mechanism4.1.2.3. Storing the Node instance data4.1.2.4. Writing the tests4.1.2.5. Filling in the stubs
6.1.1.1. Parts of an XPath expression6.1.1.2. Selecting elements6.1.1.3. Selecting attributes6.1.1.4. Selecting text, comments, and processing instructions6.1.1.5. Selecting nodes by value
6.2.1.1. Selecting a single node6.2.1.2. Selecting multiple nodes6.2.1.3. Creating an XPathNavigator
6.2.3.1. Using a custom XmlReader6.2.3.2. Using a custom XPathNavigator
7.3.3.1. Creating a stylesheet7.3.3.2. Manipulating an existing stylesheet
7.3.4.1. Embedded scripts7.3.4.2. Adding parameters with XsltArgumentList7.3.4.3. Adding extensions with XsltArgumentList
9.1.1.1. The SOAP envelope9.1.1.2. Encoding rules9.1.1.3. RPC representation
10.2.3.1. Issuing an HTTP GET request10.2.3.2. Issuing an HTTP POST request10.2.3.3. Issuing a SOAP request
10.2.6.1. The UDDI data model10.2.6.2. The UDDI APIs
12.2.3.1. Member availability and flags12.2.3.2. Functional grouping of members
15.2.2.1. Choosing a configuration section handler15.2.2.2. Defining the configuration section15.2.2.3. Adding the configuration section15.2.2.4. Reading the custom configuration programmatically

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Chapter 19. The System.Xml.XPath Namespace

XPath is a W3C specification for locating nodes in an XML document. It provides an expression syntax that can determine a node based on its type, location, and relation to other nodes in a document. XPath is generally not useful alone, but works in conjunction with other tools, especially XSLT. Figure 19-1 shows the types in this namespace.

System.Xml.XPath provides types that evaluate expressions and match nodes in XML documents. XPathDocument is a document object designed to provide fast document navigation through XPath and is used by the System.Xml.Xsl classes for XSLT transformations. XPathNavigator is the core entry point for doing XPath expressions; it is abstract, allowing for more than just XML documents to be XPath-navigated. For example, an ADO.NET provider could, if it desired, implement the IXPathNavigable interface and return an XPathNavigator that translated XPath queries into a SQL SELECT statement.