Problem with XML DOM, writing in XML document

Question

4.00/5 (1 vote)

See more:

Hi!
I have a problem with writing to an XML file. When i run my program, the c# give me an exception: "The node to be inserted is from a different document context.". I looked a bit on the exception and I found the answers , that this is happening when we write from one document to another. But i dont write from one to another, but I write from the object to xml file. This is the code where the program shows me exception:

C#

private XmlDocument novDokument = new XmlDocument();

public void zapisiArtikleKiSoNaZalogiVnewDoc(string vhodna, string izhodna)
{
    int i = 1;

    newDoc.AppendChild(newDoc.CreateXmlDeclaration(new Version(1, 0).ToString(), Encoding.UTF8.BodyName, string.Empty));
    XmlElement novSeznamArtikel = newDoc.CreateElement("seznamArtiklov");

    foreach (Artikel a in seznamPrebranihArtiklov)
    {
        if (Convert.ToInt16(a.zalogaA) > 0)
        {
            XmlElement novArtikel = newDoc.CreateElement("artikel");
            novArtikel.SetAttribute("id", i.ToString());

            XmlElement novNaziv = newDoc.CreateElement("naziv");
            novNaziv.InnerText = a.nazivA;
            novArtikel.AppendChild(novNaziv);

            XmlElement novaCena = newDoc.CreateElement("cena");
            novaCena.InnerText = a.cenaA;
            novArtikel.AppendChild(novaCena);


            XmlElement novDatum = newDoc.CreateElement("datum");
            novArtikel.AppendChild(novDatum);

            XmlElement novNabave = doc.CreateElement("nabave");
            novNabave.InnerText = a.datumNabaveA;
            novDatum.AppendChild(novNabave); //HERE RAISES AN EXCEPTION

            novSeznamArtikel.AppendChild(novArtikel);
            i++;
        }
    }

    newDoc.AppendChild(novSeznamArtikel);

    XmlTextWriter tw = new XmlTextWriter(izhodna, null);
    tw.Formatting = Formatting.Indented;
    newDoc.WriteContentTo(tw);

    tw.Close();
}

And XML document should look like this:

XML

<?xml version="1.0" encoding="utf-8" ?>
<seznamArtiklov>
  <artikel id="1">
    <naziv>Kruh</naziv>
    <cena>3</cena>
    <datum>
      <nabave>03.09.2012</nabave>
    </datum>
  </artikel>
</seznamArtiklov

If anyone knows the solution to my problem is very welcome. To answer thank you in advance!

Posted 12-Jan-13 22:08pm

vezo11

Add a Solution

2 solutions

Solution 2

Hi,
i have tried, but the same effect. Exception signals on the same line:

C#

novDatum.AppendChild(novNabave);

Thanks for the reply.

Posted 12-Jan-13 22:36pm

vezo11

Comments

Thomas Daniels 13-Jan-13 4:53am

I updated my answer.

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Thomas Daniels · Accepted Answer · 2013-01-12T22:31:00

Solution 1

Hi,

Try changing this:

C#

XmlElement novDatum = newDoc.CreateElement("datum");
novArtikel.AppendChild(novDatum);

XmlElement novNabave = doc.CreateElement("nabave");
novNabave.InnerText = a.datumNabaveA;
novDatum.AppendChild(novNabave); //HERE RAISES AN EXCEPTION

into this:

C#

XmlElement novDatum = newDoc.CreateElement("datum");

XmlElement novNabave = doc.CreateElement("nabave");
novNabave.InnerText = a.datumNabaveA;
novDatum.AppendChild(newDoc.ImportNode(novNabave, true)); // first import the node into the document, and then append novNabave to novDatum before you append novDatum to novArtikel

novArtikel.AppendChild(novDatum);

Hope this helps.

Posted 12-Jan-13 22:31pm

Thomas Daniels

Updated 12-Jan-13 22:52pm

v2

Comments

vezo11 13-Jan-13 4:59am

Thank you very much! :)

I assumed that elements do not nest correctly or in a way, first add the file and then append.

Again thanks for the reply!

Thomas Daniels 13-Jan-13 5:02am

You're welcome!

vezo11 13-Jan-13 5:09am

And if you look this:
XmlElement novDatum = newDoc.CreateElement("datum");
novArtikel.AppendChild(novDatum);
and this:
XmlElement novNabave = doc.CreateElement("nabave");
novNabave.InnerText = a.datumNabaveA;
novDatum.AppendChild(novNabave);

You see the difference.. First i use newDoc, in second case i use doc. My mistake, because I changed the code, when I repaired one another mistake and I forgot to change it back.

But of course, both solutions works! :)