Some root information is seen as illegal characters

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I'm trying to read the XML file with XmlDocument and using XPath to get to my childnodes. I've added a NamespaceManager and pointed to my parentNode. The purpose is to find childnodes with specific names and change the innertext whether or not the childnode has an attribute. Also it needs to be that specific word in the childnode, not a part of a word. How could I do this please?

example:

<?xml version="1.0"?>
<AnXMLTestFile xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="un:unece:260:data:EEM:02-02-AnXMLTestFile">
  <HeaderBEDocument>
    <Identification>45071dc8-558d-439a-8f0a-88ae73a74910</Identification>
    <DocumentType listAgencyIdentifier="6">386</DocumentType>
    <Creation>2016-06-14T12:31:58.0+01:00</Creation>
  </HeaderBEDocumtent>
  <PayloadBEInvoiceEvent>
    <Identification>45071dc8-558d-439a-8f0a-88ae73a74910</Identification>
    <Function listAgencyIdentifier="6">9</Function>
    <CalculationDateOccurrence>2016-06-14T12:31:58.0+01:00</CalculationDateOccurrence>
    <ConsumptionMonthOccurrence>--04</ConsumptionMonthOccurrence>
    <ConsumptionYearOccurrence>2016</ConsumptionYearOccurrence>
    <SDPUsedServiceDeliveryPointLocation>
      <HeadpointIdentificationDomainLocation>
        <Identification schemeAgencyIdentifier="9">941449900000000028</Identification>
      </HeadpointIdentificationDomainLocation>
      <SCI schemeAgencyIdentifier="86">SC_COMMINJ</SCI>
    </SDPUsedServiceDeliveryPointLocation>
  </PayloadBEInvoiceEvent>

The 'Identification' in bold should change of innertext.

On debugging I get the 'illegal characters were found' error. If I leave out the first part of my root node no error message are shown anymore and the innertext changes as it should. How can I fix this please?

What I have tried:

characters left out from the root:

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"

Innertext filling up on debugging. But I need those URL's! They are in all 150 Xml-files that I want to change.

Posted 1-Mar-17 0:10am

AAB40

Updated 1-Mar-17 23:29pm

v2

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Richard MacCutchan 1-Mar-17 12:08pm

What is the exact error message, and which line does it refer to?

2 solutions

Solution 1

You can use XmlTextReader to get to all elements in a sequential way.
More information: XmlTextReader.Read Method (System.Xml)[^]
The XmlTextReader - A Beginner's Guide[^]

Posted 1-Mar-17 7:40am

RickZeeland

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AAB40 · Accepted Answer · 2017-03-01T23:29:00

Solved: Foreach-loop containes the different nodes I need to change innertext from. In each " var XXXNode = node.SelectSingleNode("x:XXX", nsmgr); " You need to add "//" before the "x". Like this

// Select Identification node from all nodes
                var identificationNode = node.SelectSingleNode("//x:Identification", nsmgr); //<==
                if (identificationNode != null)
                {
                    // Change value of indentification node to string
                    identificationNode.InnerText = "string";
                }
// Select SCI node from all parentnodes
                var SCI = node.SelectSingleNode("//x:SCI", nsmgr);//<==
                if (SCI != null)
                {
                    // change value of SCI node to string
                    SCI.InnerText = "56987465";
                }
                // Select ReferenceType node from all nodes
                var ReferenceType = node.SelectSingleNode("//x:ReferenceType", nsmgr);//<==
                if (ReferenceType != null)
                {
                    // change value of ReferenceType node to string
                    ReferenceType.InnerText = "AA";
                }
                // Select CCType node from all nodes
                var CCType = node.SelectSingleNode("//x:CCType", nsmgr);//<==
                if (CCType != null)
                {
                    // change value of CCType node to string
                    CCType.InnerText = "string";
                }

Also use the "root.OuterXml" to show the changes in the object of VS. Here:

richTextBox1.Text = root.OuterXml;