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MoveXMLData/WindowsFormsApp1/XpathUpd.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml;
+
+namespace WindowsFormsApp1
+{
+    public class XpathUpd
+    {
+        public void testXpathModifying()
+        {
+            // text xml
+            var xml = @"<Data >
+    <Inputs>
+    <a:ImageInput>
+        <a:Name>BSE</a:Name>
+    </a:ImageInput>
+    </Inputs>
+     </Data>";
+
+            XmlDocument xmld = new XmlDocument();
+
+            XmlNamespaceManager nsmgr; // this will hold our namespaces with their prefixes
+            xmld.Load(GetReader(xml, out nsmgr)); // xml can also be your file
+
+            // we are going to find a text node, hence cast to XmlText
+            var name2 = (XmlText)xmld.SelectSingleNode(
+                    "/Data/Inputs/a:ImageInput/a:Name[.='BSE']/text()",
+                    nsmgr); // here is the namespace manager so it knows what a is
+            if (name2 != null)
+            {
+                //name2.SetAttribute("a:Name", "{{16}}");
+                name2.Value = "{{16}}";
+            }
+
+            string AmmendedFile = @"C:\ProgramData\Oxford Instruments NanoAnalysis\XXXX NewXMLReader\Xpath_Mics_Sim.xml";
+            xmld.Save(AmmendedFile);
+        }
+
+        // Creates a reader and outputs a namespacemanager that fits for the missing namespace prefixes
+        XmlReader GetReader(string xml, out XmlNamespaceManager nsmgr)
+        {
+            // code example taken from
+            // https://blogs.msdn.microsoft.com/runeetv/2009/02/12/undeclared-namespace-in-xml-eg-xsi-is-an-undeclared-namespace/
+            // from author runeetv and https://blogs.msdn.microsoft.com/runeetv/author/runeetvashisht/
+
+            NameTable nt = new NameTable();
+            // add missing namespace prefixes
+            nsmgr = new XmlNamespaceManager(nt);
+            nsmgr.AddNamespace("a", "urn:why-was-this-left-out?");
+
+            XmlParserContext context = new XmlParserContext(null, nsmgr, null, XmlSpace.None);
+            XmlReaderSettings xset = new XmlReaderSettings();
+            xset.ConformanceLevel = ConformanceLevel.Fragment;
+
+            // return XmlReader.Create(xml, xset, context); // use this if you want xml to be a filepath
+            return XmlReader.Create(new StringReader(xml), xset, context);
+        }
+
+    }
+}