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LINQ to XML was designed to be a cleaner, modernized API, as well as fast and lightweight. Append Child(contacts); This style of coding provides few clues to the structure of the XML tree.
LINQ to XML uses modern language features (e.g., generics and nullable types) and diverges from the DOM programming model with a variety of innovations to simplify programming against XML. LINQ to XML supports this approach to constructing an XML tree but also supports an alternative approach referred to as functional construction.
The samples in most of this document are shown in C# for brevity.
(44 printed pages) Introduction Sample XML Programming XML With LINQ to XML LINQ to XML Design Principles The LINQ to XML Class Hierarchy XML Names Loading Existing XML Creating XML From Scratch Traversing XML Manipulating XML Working With Attributes Working With Other Types of XML Nodes Annotating Nodes With User-Defined Information Outputting XML Validating XML Querying XML With LINQ to XML Querying XML Using Query Expressions with XML Using XPath and XSLT With LINQ to XML Mixing XML and Other Data Models Reading From a Database to XML Reading XML and Updating a Database Layered Technologies Over LINQ to XML LINQ to XML in Visual Basic 9.0 Schema Aware XML Programming February 2007 CTP Release Notes Changes Since the May 2006 CTP Non-Exhaustive List of Planned Features in Future Releases References XML has achieved tremendous adoption as a basis for formatting data whether in Word files, on the wire, in configuration files, or in databases; XML seems to be everywhere.
LINQ to XML is a language-agnostic component of the LINQ Project. Functional construction is described further in the section titled "Creating XML From Scratch." Document "free" When programming XML your primary focus is usually on XML elements and perhaps attributes.
The samples in most of this document are shown in C# for brevity. This makes sense because an XML tree, other than at the leaf level, is composed of XML elements and your primary goal when working with XML is traversing or manipulating the XML elements that make up the XML tree.
LINQ to XML can be used just as well with a LINQ-enabled version of the Visual Basic . Section "LINQ to XML in Visual Basic 9.0" discusses Visual Basic-specific programming with LINQ to XML in more detail. In LINQ to XML you can work directly with XML elements in a natural way.
For the purposes of this paper let's establish a simple XML contact list sample that we can use throughout our discussion. For example you can do the following: Compare this to W3C DOM, in which the XML document is used as a logical container for the XML tree.
Xml Document doc = new Xml Document(); Xml Element name = doc. Inner Text = "Patrick Hines"; Xml Element phone1 = doc. Arguably, the complexity of XML names, which is often considered an advanced topic in XML literature, comes not from namespaces, which developers use regularly in programming, but from XML prefixes.
The API choices for working with XML seem to be either aged and verbose such as DOM or XML specific such as XQuery or XSLT which require motivation, study, and time to master.
LINQ to XML, a component of the LINQ project, aims to address this issue.
From an XML perspective, LINQ to XML provides the query and transformation power of XQuery and XPath integrated into .
NET Framework languages that implement the LINQ pattern (for example, C#, Visual Basic, and so on.).