May 2018
Intermediate to advanced
680 pages
15h 54m
German
Content preview from XML -- Technologien, Grundlagen, Validierung, Auswertung
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Der Namespace System.Xml.XPath
Eine direkte Arbeit mit XPath ist auch im .NET-Namespace System.Xml.XPath möglich und daher über VisualBasic.NET ansprechbar. Die XPathDocument-Klasse instanziiert hier einen XPathNavigator, der über seine Compile-Methode wiederum eine XPathExpression instanziiert.
Abhängig vom jeweiligen XPathResultType, können Sie eine differenzierte VisualBasic.NET-Logik aufbauen. Handelt es sich beispielsweise nicht um einen Einzelwert, sondern einen NodeSet, so kann eine Schleife über einen XPathNodeIterator laufen, um die Werte wunschgemäß auszugeben.
Public Const xmlurl As String = "C:\wg\Ort_Elemente.xml" Public Sub xpathdemo() Try Dim xpathstr As String = "/Orte/Ort/Mensch/vorname" Dim xpd As New XPath.XPathDocument(xmlurl) ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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