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作者： unknow

在.Net1.2中支持Xquery，Xquery使用一种叫FLWOR的查询语言（音Flower）.例子如下：

using System;
using System.IO;
using System.Xml;
using System.Xml.Query;
using System.Data.SqlXml;
namespace XQuery{
public class XQuerySample{
public static void Main(string[] args) {
System.Xml.XmlDataSourceResolver ds = new System.Xml.XmlDataSourceResolver ();
ds.Add("bookstore","books.xml");
StreamWriter writer=new StreamWriter("output.xml");
string query=@"<bookstore> {
for $b in document(@#bookstore@#)/bookstore/book
where $b/@genre=@#philosophy@# and $b/@publicationdate=@#1991@#
return $b/title
}
</bookstore>";
XQueryProcessor xp = new XQueryProcessor ();
xp.Compile(query);
xp.Execute(ds, writer);
writer.Close();
}
}
}

books.xml


<?xml version="1.0" encoding="utf-8"?>
<!-- This file represents a fragment of a bookstore database -->
<bookstore>
<book genre="autobiography" publicationdate="1981" ISBN="1-861-11-0">
<title>The Autobiography of Benjamin Franklin</title>
<author>
<first-name>Benjamin</first-name>
<last-name>Franklin</last-name>
</author>
<price>8.99</price>
</book>
<book genre="novel" publicationdate="1967" ISBN="0-201-63361-2">
<title>The Confidence Man</title>
<author>
<first-name>Herman</first-name>
<last-name>Melville</last-name>
</author>
<price>11.99</price>
</book>
<book genre="philosophy" publicationdate="1991" ISBN="1-861001-57-6">
<title>The Gorgias</title>
<author>
<name>Plato</name>
</author>
<price>9.99</price>
</book>
</bookstore>

output.xml

<?xml version="1.0" encoding="utf-8"?>
<bookstore>
<title>The Gorgias</title>
</bookstore>