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How to use LINQ to XML

2025-01-28 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Development >

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Editor to share with you how to use LINQ to XML, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

First, getting started with LINQ to XML

LINQ to XML is a LINQ-enabled in-memory XML programming interface that allows you to process XML in the .NET Framework programming language. It places XML documents in memory, much like the document object Model (DOM). You can query and modify the XML document, and after modifying it, you can save it as a file, or you can serialize it and send it over the network. However, LINQ to XML is different from DOM: it provides a new object model, which is lighter and easier to use, which takes advantage of the language improvements of Visual C # 2008.

The most important advantage of LINQ to XML is its integration with Language-Integrated Query (LINQ). Because of this integration, queries can be written against in-memory XML documents to retrieve collections of elements and attributes. LINQ to XML's query capabilities are functionally (though not syntactically) comparable to XPath and XQuery. Visual C # 2008 integrates with LINQ to provide stronger typing, compile-time checking, and improved debugger support.

A powerful method of creating a XML tree is implemented by using the query results as parameters of the XElement and XAttribute object constructors. This approach, called "function construction", allows developers to easily convert XML trees from one shape to another.

Second, load the document

Xml documents can be loaded through XDocument or XElement's static method Load, and Load can accept URI strings and TextReader,XmlReader as the input source. You can also use the static method Parse to turn a string into an xml document to be queried. The difference between XDocument and XElement is that when querying, XElment can skip the root points and query directly.

/ / load from a file

XDocument myPets = XDocument.Load ("MyPets.xml")

/ / load the weather forecast from http

String weatherWebService =

"http://www.webxml.com.cn/WebServices/WeatherWebService.asmx/

GetWeatherbyCityName?theCityName=58367 "

XDocument weather = XDocument.Load (weatherWebService)

XElement weatherElement = XElement.Load (weatherWebService)

The above is all the contents of this article "how to use LINQ to XML". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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