Splitting an xml and adding elements from it to another xml

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Manipulate XML data with XPath and XmlDocument (C#)[^]

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Hi!

Yesterday wasn´t the most successful day and i got frustrated and my question became a victim of my frustration and i apologize for that. I was experimenting with this yesterday for a couple of hours and searched the internet for answers.

I found this:
http://stackoverflow.com/questions/184486/what-is-an-intuitive-way-to-move-an-xmlnode-from-one-xmldocument-to-another

which is basically the solution to my question or it should be but i can´t get it to work.

To clarify my question:

I need to know how to "split" an xml via C#. I want to extract a node from my xml:

<?xml version="1.0" encoding="utf-8"?>
<Person>
  <Attributes>
    <Height->184cm-</Height->
    <Eyes->Green-</Eyes->
    <Hairs->Blond-</Hairs->
    <Age->24</Age->
    <FirstName->Emma</FirstName->
    <LastName->Svensson</LastName->
    <Happy->ImAlwaysHappy</Happy->
    <AngryNode->HulkSMASH</AngryNode->
  </Attributes>
</Person>

and put it in another xml. so my question is : How do i split an xml and add an node from the old xml to a new one.

I have created an xml via c# :

using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.IO;

namespace XmlSkills
{
    class Program
    {
        static void Main(string[] args)
        {



            XmlTextWriter objWriter = new XmlTextWriter(@"c:\temp2\XmlSK.xml", null);

            XmlDocument xmlDoc4 = new XmlDocument();

            XmlDeclaration xmlDeclaration = xmlDoc4.CreateXmlDeclaration("1.0", "utf-8", null);

            XmlElement RootElement = xmlDoc4.CreateElement("Person");

            xmlDoc4.InsertBefore(xmlDeclaration, xmlDoc4.DocumentElement);

            xmlDoc4.AppendChild(RootElement);

            XmlElement ParentElement = xmlDoc4.CreateElement("Attributes");
            xmlDoc4.DocumentElement.PrependChild(ParentElement);
            //--- 1
            XmlElement HeightNode = xmlDoc4.CreateElement("Height-");
            XmlText HeightText = xmlDoc4.CreateTextNode("184cm-");

            ParentElement.AppendChild(HeightNode);
            HeightNode.AppendChild(HeightText);

            //--- 2
            XmlElement EyeNode = xmlDoc4.CreateElement("Eyes-");
            XmlText EyeColorText = xmlDoc4.CreateTextNode("Green-");

            ParentElement.AppendChild(EyeNode);
            EyeNode.AppendChild(EyeColorText);

            //--- 3
            XmlElement HairNode = xmlDoc4.CreateElement("Hairs-");
            XmlText HairText = xmlDoc4.CreateTextNode("Blond-");

            ParentElement.AppendChild(HairNode);
            HairNode.AppendChild(HairText);

            //--- 4
            XmlElement AgeNode = xmlDoc4.CreateElement("Age-");
            XmlText AgeText = xmlDoc4.CreateTextNode("24");

            ParentElement.AppendChild(AgeNode);
            AgeNode.AppendChild(AgeText);

            //--- 5
            XmlElement FirstNameNode = xmlDoc4.CreateElement("FirstName-");
            XmlText FirstNameText = xmlDoc4.CreateTextNode("Emma");

            ParentElement.AppendChild(FirstNameNode);
            FirstNameNode.AppendChild(FirstNameText);

            //--- 6
            XmlElement LastNameNode = xmlDoc4.CreateElement("LastName-");
            XmlText LastNametxt = xmlDoc4.CreateTextNode("Svensson");

            ParentElement.AppendChild(LastNameNode);
            LastNameNode.AppendChild(LastNametxt);

            //--- 7
            XmlElement HappyNode = xmlDoc4.CreateElement("Happy-");
            XmlText HappyText = xmlDoc4.CreateTextNode("ImAlwaysHappy");

            ParentElement.AppendChild(HappyNode);
            HappyNode.AppendChild(HappyText);

            //--- 8
            XmlElement AngryNode = xmlDoc4.CreateElement("AngryNode-");
            XmlText AngryText = xmlDoc4.CreateTextNode("HulkSMASH");

            ParentElement.AppendChild(AngryNode);
            AngryNode.AppendChild(AngryText);

            xmlDoc4.Save(@"c:\temp2\XmlSK4.xml");





            Splitt splitt = new Splitt(xmlDoc4);
        }

At the end i create an object of a new class and send the xml that i have created to the new class, which looks like this:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;

namespace XmlSkills
{
    class Splitt
    {
        public Splitt(XmlDocument xml)
        {
            XmlDocument sourcdoc = xml;
            XmlDocument Xdoc = new XmlDocument();

            XmlDeclaration xmlDeclaration = Xdoc.CreateXmlDeclaration("1.0", "utf-8", null);


            Xdoc.InsertBefore(xmlDeclaration, Xdoc.DocumentElement);

            XmlElement root = Xdoc.CreateElement("Person");
            Xdoc.AppendChild(root);

            XmlElement attributes = Xdoc.CreateElement("Attributes");
            Xdoc.DocumentElement.PrependChild(attributes);

            XmlNode NodeFromDiffirentDocument = sourcdoc.DocumentElement.ChildNodes[0];
            XmlDocument targetDocument = Xdoc;
            XmlNode targetParentNode = Xdoc.DocumentElement;
            bool ShouldDodeeCopy = true;

            XmlNode copyThatBelongsToTargetDocument =
                Xdoc.ImportNode(NodeFromDiffirentDocument, false);
            targetParentNode.AppendChild(copyThatBelongsToTargetDocument);

            Xdoc.Save(@"c:\temp2\XmlNew.xml");



        }
    }
}

Basically i applied the code that i found at stackoverflow which should be the solution to my problem. Although it does not cut the element from the "old" xml, it just copies it and when i changed the childnode index :

XmlNode NodeFromDiffirentDocument = sourcdoc.DocumentElement.ChildNodes[0];

to anything but 0 i get the following error:

Cannot import a null node.

I have checked the forum and i mostly find programs that do the split for me and other more advanced code that i don´t need here, this should be farily simple but im messing up somwhere.

Im a junior system developer and i got this job during the summer where im learning a ton of new and interesting stuff. Now we are in the learning process of creating xml via C# and one of the tasks that i need to solve by myself is this. Im not trying to get a fast answer here since the help of forums is allowed, it´s a learning process where i need to know how to describe my problem and understand the solution that i get or that i find.

Im thankful for any help that i can get and I apologize for the recent post.

Regards
Peter!