Introducing LINQ with XML and Databases - XML Literals in Visual Basic
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There's one final thing I'd like to mention on the topic of LINQ to XML. If you're using Visual Basic, you can drop literal XML right into your code:
Dim document As XDocument = _
<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<people>
<person>
<name>Bob</name>
<age>35</age>
</person>
<person>
<name>Henry</name>
<age>43</age>
</person>
<person>
<name>Joe</name>
<age>22</age>
</person>
<person>
<name>Chuck</name>
<age>29</age>
</person>
</people>
In order to recreate the last example, you would simply wrap the query in <%= %> tags:
Dim overThirtyDocument As XDocument = _
<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<people>
<%= From p In document.Descendants("person") _
Where CInt(p.Element("age")) > 30 _
Select p %>
</people>
Conclusion
LINQ is a powerful new tool in the .NET developer's toolbox. It integrates data access directly into .NET languages, providing a very readable query language that can be used on a variety of data sources. In these two articles, we covered objects, XML files and databases, but LINQ supports other data sources, too, that you may want to look into.
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