Sascha, Because of xmlns=“http://docbo…” in the outer ‘info’ node, you need to specify that namespace with SelectSingleNode. To do so, you also need an XmlNamespaceManager.
var nsmgr = new XmlNamespaceManager(xmlDoc.NameTable); nsmgr.AddNamespace(“whatever", "http://docbook.org/ns/docbook";); var productNumberNode = doc.SelectSingleNode(“//whatever:productnumber", nsmgr); -Dave > On Feb 7, 2017, at 11:15 AM, Sascha Manns <[email protected]> wrote: > > Hello list, > > i have a DocBook file with that content: > > <info version="5.0" xml:id="info-Documentation-Test-Test" > xmlns="http://docbook.org/ns/docbook <http://docbook.org/ns/docbook>" > xmlns:xlink="http://www.w3.org/1999/xlink"; <http://www.w3.org/1999/xlink%22>> > ... > <productnumber>0.1</productnumber> > ... > </info> > > My goal now is to replace that number with another. I tried: > > XmlDocument xmlDoc = new XmlDocument(); > xmlDoc.Load(info); > xmlDoc.SelectSingleNode("//productnumber").InnerText = revnumber; > xmlDoc.Save(info); > > The info variable targets to the mentioned file above. > > If i'm running my code i'm getting: > > Exception in Gtk# callback delegate > Note: Applications can use GLib.ExceptionManager.UnhandledException to > handle the exception. > System.Reflection.TargetInvocationException: Exception has been thrown by the > target of an invocation. ---> System.NullReferenceException: Object reference > not set to an instance of an object > at PublicanCreators.Core.RevUpd.ChangeRevision (System.String revnumber, > System.String articleInfo, System.String bookInfo) [0x0003e] in > /home/sascha/RiderProjects/PublicanCreators/src/PublicanCreators.Core/RevUpd.cs:85 > > > Maybe anyone knows how to fix that? > > Greetings > Sascha > > _______________________________________________ > Mono-list maillist - [email protected] > http://lists.dot.net/mailman/listinfo/mono-list
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