How to add Xml node in existing xml file using c# [Resolved]

Posted by Karthik2010_Mca under C# on 6/28/2016 | Points: 10 | Views : 10925 | Status : [Member] | Replies : 6

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Hi

I want to add new xml node in existing xml file using c#.

Ex: My existing xml code like below,

<manifest xmlns:imsmd="http://ltsc.ieee.org/xsd/LOM">
 <resources>
   <resource>
	<file href="default.xml">
	  <metadata>
		<imsmd:lom />
	  </metadata>
	</file>
   </resource>
 </resources>
                      -----------------------
In above existing xml file I want to add new node like below using c# code,
<manifest xmlns:imsmd="http://ltsc.ieee.org/xsd/LOM">
 <resources>
   <resource>
	<file href="default.xml">
	  <metadata>
		<imsmd:lom />
	  </metadata>
	</file>
        <file href="testimg.png">
	  <metadata>
		<imsmd:lom />
	  </metadata>
	</file>
   </resource>
 </resources>

Regards
Karthik

Karthik

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Posted by: Rajnilari2015 on: 6/28/2016 [Member] [Microsoft_MVP] [MVP] Platinum | Points: 50

0	@Kartik Sir, try this using System; using System.Linq; using System.Xml.Linq; namespace ConsoleApplication1 { class Program { static void Main(string[] args) { string input = @"<manifest xmlns:imsmd=""http://ltsc.ieee.org/xsd/LOM""><resources><resource><file href=""default.xml""><metadata><imsmd:lom /></metadata></file></resource></resources></manifest>"; var doc = XDocument.Parse(input); doc.Descendants("resource") .ElementAt(0) .Add(new XElement("file", new XAttribute("href", "testimg.png"), new XElement("metadata", new XElement(doc.Root.GetNamespaceOfPrefix("imsmd") + "lom")))); var str = doc.ToString(); Console.ReadKey(); } } } The output of the program is <manifest xmlns:imsmd="http://ltsc.ieee.org/xsd/LOM"> <resources> <resource> <file href="default.xml"> <metadata> <imsmd:lom /> </metadata> </file> <file href="testimg.png"> <metadata> <imsmd:lom /> </metadata> </file> </resource> </resources> </manifest> Hope that helps -- Thanks & Regards, RNA Team Karthik2010_Mca, if this helps please login to Mark As Answer. \| Alert Moderator

@Kartik Sir, try this

using System;

using System.Linq;

using System.Xml.Linq;



namespace ConsoleApplication1

{

    class Program

    {

        static void Main(string[] args)

        {

            string input = @"<manifest xmlns:imsmd=""http://ltsc.ieee.org/xsd/LOM""><resources><resource><file href=""default.xml""><metadata><imsmd:lom /></metadata></file></resource></resources></manifest>";

            var doc = XDocument.Parse(input);

            doc.Descendants("resource")

                .ElementAt(0)

                .Add(new XElement("file", new XAttribute("href", "testimg.png"),

                     new XElement("metadata", new XElement(doc.Root.GetNamespaceOfPrefix("imsmd") + "lom"))));



            var str = doc.ToString(); 



            Console.ReadKey();

        }        

    }

}

The output of the program is

<manifest xmlns:imsmd="http://ltsc.ieee.org/xsd/LOM">

  <resources>

    <resource>

      <file href="default.xml">

        <metadata>

          <imsmd:lom />

        </metadata>

      </file>

      <file href="testimg.png">

        <metadata>

          <imsmd:lom />

        </metadata>

      </file>

    </resource>

  </resources>

</manifest>

Hope that helps

--
Thanks & Regards,
RNA Team

Karthik2010_Mca, if this helps please login to Mark As Answer. | Alert Moderator

Posted by: A2H on: 6/28/2016 [Member] [MVP] Silver | Points: 25

0	You can use XDocument to read the xml file and nodes like given below //Change the path name here string filename = @"F:\AspNetWebApplication\EmptyWebApp\Test.xml"; //create new instance of XmlDocument XmlDocument doc = new XmlDocument(); string nodeNamespace = "http://ltsc.ieee.org/xsd/LOM"; //load from file doc.Load(filename); //select your specific node .. XmlElement el = (XmlElement)doc.SelectSingleNode("/resources/resource"); //create node and add value XmlElement node = doc.CreateElement("file",null); node.SetAttribute("href", "testimg.png"); //create metadata node XmlElement metadataTitle = doc.CreateElement("metadata"); //create imsdm node XmlElement imsdmnode = doc.CreateElement("imsmd","lom", nodeNamespace); //add to parent node metadataTitle.AppendChild(imsdmnode); node.AppendChild(metadataTitle); //add to elements collection doc.DocumentElement.AppendChild(node); //save back doc.Save(filename); Thanks, A2H My Blog Karthik2010_Mca, if this helps please login to Mark As Answer. \| Alert Moderator

You can use XDocument to read the xml file and nodes like given below

//Change the path name here

                string filename = @"F:\AspNetWebApplication\EmptyWebApp\Test.xml";

                //create new instance of XmlDocument

                XmlDocument doc = new XmlDocument();



                string nodeNamespace = "http://ltsc.ieee.org/xsd/LOM";

                //load from file

                doc.Load(filename);



                //select your specific node ..

                XmlElement el = (XmlElement)doc.SelectSingleNode("/resources/resource"); 



                //create node and add value

                XmlElement node = doc.CreateElement("file",null);

                node.SetAttribute("href", "testimg.png");



                //create metadata node

                XmlElement metadataTitle = doc.CreateElement("metadata");

                

                 //create imsdm node

                XmlElement imsdmnode = doc.CreateElement("imsmd","lom", nodeNamespace);



                //add to parent node

                metadataTitle.AppendChild(imsdmnode);

                node.AppendChild(metadataTitle);



                //add to elements collection

                doc.DocumentElement.AppendChild(node);



                //save back

                doc.Save(filename);

Thanks,
A2H
My Blog

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Posted by: A2H on: 6/28/2016 [Member] [MVP] Silver | Points: 25

0	Reference URL : https://msdn.microsoft.com/en-us/library/system.xml.xmldocument(v=vs.110).aspx Thanks, A2H My Blog Karthik2010_Mca, if this helps please login to Mark As Answer. \| Alert Moderator

Posted by: Karthik2010_Mca on: 6/28/2016 [Member] Starter | Points: 25

0	Hi Above code is working fine. but new node has been added before </resource> node. New node should be add after </file> node. Even I was trying this code XmlElement el = (XmlElement)doc.SelectSingleNode("/resources"); That also it is updating after </resource> node. Thanks Karthik Karthik Karthik2010_Mca, if this helps please login to Mark As Answer. \| Alert Moderator

Posted by: A2H on: 6/28/2016 [Member] [MVP] Silver | Points: 25

0	You wrote "but new node has been added before </resource> node. New node should be add after </file> node. " To resolve that issue you can try with the below code //Change the path name here string filename = @"F:\AspNetWebApplication\EmptyWebApp\Test.xml"; //create new instance of XmlDocument XmlDocument doc = new XmlDocument(); string nodeNamespace = "http://ltsc.ieee.org/xsd/LOM"; //load from file doc.Load(filename); //select your specific node .. XmlElement file = (XmlElement)doc.SelectSingleNode("/manifest/resources/resource"); //create node and add value XmlElement node = doc.CreateElement("file",null); node.SetAttribute("href", "testimg.png"); //create metadata node XmlElement metadataTitle = doc.CreateElement("metadata"); //create imsdm node XmlElement imsdmnode = doc.CreateElement("imsmd","lom", nodeNamespace); //add to parent node metadataTitle.AppendChild(imsdmnode); node.AppendChild(metadataTitle); //add to elements collection file.AppendChild(node); //save back doc.Save(filename); Thanks, A2H My Blog Karthik2010_Mca, if this helps please login to Mark As Answer. \| Alert Moderator

You wrote "but new node has been added before </resource> node. New node should be add after </file> node. "

To resolve that issue you can try with the below code

//Change the path name here
                string filename = @"F:\AspNetWebApplication\EmptyWebApp\Test.xml";
                //create new instance of XmlDocument
                XmlDocument doc = new XmlDocument();
                string nodeNamespace = "http://ltsc.ieee.org/xsd/LOM";
                //load from file
                doc.Load(filename);

                //select your specific node ..
                XmlElement file = (XmlElement)doc.SelectSingleNode("/manifest/resources/resource"); 
            
                //create node and add value
                XmlElement node = doc.CreateElement("file",null);
                node.SetAttribute("href", "testimg.png");

                //create metadata node
                XmlElement metadataTitle = doc.CreateElement("metadata");
                
                 //create imsdm node
                XmlElement imsdmnode = doc.CreateElement("imsmd","lom", nodeNamespace);

                //add to parent node
                metadataTitle.AppendChild(imsdmnode);
                node.AppendChild(metadataTitle);

                //add to elements collection
                file.AppendChild(node);

                //save back
                doc.Save(filename);

Thanks,
A2H
My Blog

Karthik2010_Mca, if this helps please login to Mark As Answer. | Alert Moderator

Posted by: Karthik2010_Mca on: 6/29/2016 [Member] Starter | Points: 25

0	Hi After updating the above code, then also the new node is came after </resources> node. Thanks Karthik Karthik2010_Mca, if this helps please login to Mark As Answer. \| Alert Moderator

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