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(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.

Yet, from a development perspective, XML is still hard to work with.

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.

This section details how to program with LINQ to XML independent of Language-Integrated Query. In DOM XML nodes, including elements and attributes, must be created in the context of an XML document.

NET Framework languages that implement the LINQ pattern (for example, C#, Visual Basic, and so on.).

This provides a consistent query experience across LINQ enabled APIs and allows you to combine XML queries and transforms with queries from other data sources.

From an XML perspective, LINQ to XML provides the query and transformation power of XQuery and XPath integrated into .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.Allow Xml Attributes; // Set the validation settings. Validation Event Handler = On Validation Event Handler; // Create the Xml Reader object. Create(_xml File Path, settings); // Parse the file. Michael Champion February 2007 Applies to: Visual Studio Code Name "Orcas" .

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