LINQ to XML permite manipularea fisierelor XML cu ajutorul unor clase optimizate pentru interogarile de tip LINQ. Sintaxa este aceeasi folosita pentru interogarea obiectelor (vezi exemplu).
Fisierul xml pe care il vom folosi este:
<?xml version="1.0"?> <catalog> <book id="bk101"> <author>Gambardella, Matthew</author> <title>XML Developer's Guide</title> <genre>Computer</genre> <price>44.95</price> <publish_date>2000-10-01</publish_date> <description> An in-depth look at creating applications with XML. </description> </book> <book id="bk102"> <author>Ralls, Kim</author> <title>Midnight Rain</title> <genre>Fantasy</genre> <price>5.95</price> <publish_date>2000-12-16</publish_date> <description> A former architect battles corporate zombies, an evil sorceress, and her own childhood to become queen of the world. </description> </book> <book id="bk103"> <author>Corets, Eva</author> <title>Maeve Ascendant</title> <genre>Fantasy</genre> <price>5.95</price> <publish_date>2000-11-17</publish_date> <description> After the collapse of a nanotechnology society in England, the young survivors lay the foundation for a new society. </description> </book> <book id="bk104"> <author>Corets, Eva</author> <title>Oberon's Legacy</title> <genre>Fantasy</genre> <price>5.95</price> <publish_date>2001-03-10</publish_date> <description> In post-apocalypse England, the mysterious agent known only as Oberon helps to create a new life for the inhabitants of London. Sequel to Maeve Ascendant. </description> </book> </catalog>
Pentru afisarea cartilor din categoria Computer se poate scrie:
XDocument document = XDocument.Load("Books.xml"); var allBooks = from book in document.Descendants("book") where book.Element("genre").Value == "Computer" select book.Element("title").Value; foreach (var item in allBooks) { Console.WriteLine(item.ToString()); }
Category: Uncategorized