CODEWITHSUNDEEP
c#xmlnamespacesattributes
grozdeto
grozdeto

Reputation: 1369

How to add a namespace and another namespace with a prefix in XML inside the doc

My Goal is create an XML node that has two attributes - one is a namespace and another is a prefix of that namespace, as shown below:

enter image description here

So far I have tried 3 options:

Option 1: Hardcoding it, does not work.

        XElement paymentmethodType = XElement.Parse("<PaymentMethod xmlns:xsi=\"w3.org/2001/XMLSchema-instance\" xsi:type=\"CreditTransferType\"/>");

I only get this:

 <PaymentMethod xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" type="CreditTransferType">

Option 2 : Using my structure with XmlAttributes and XMlNodes:

    XmlAttribute paymentmethodNamespace = CreateAttribute(paymentMethod, "xmlns:xsi", "http://w3.org/2001/XMLSchema-instance");
    XmlAttribute paymentmethodType = CreateAttribute(paymentMethod, "xsi:type", "CreditTransferType");

    public XmlAttribute CreateAttribute(XmlNode parentNode, string attributeName, string attributeValue)
    {
        var attribute = parentNode.OwnerDocument.CreateAttribute(attributeName);
        attribute.Value = attributeValue;
        parentNode.Attributes.Append(attribute);
        // parentNode.AppendChild(node);
        return attribute;
    }

I again get this:

 <PaymentMethod xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" type="CreditTransferType">

Option 3 : XElement and XAttributes:

        XElement paymentMethod = new XElement("PaymentMethod",
        new XAttribute(XNamespace.Xmlns + "xsi", "http://w3.org/2001/XMLSchema-instance"),
        new XAttribute(XNamespace.Xmlns + "xsi:type", "CreditTransferType"));

But i get an Exception that ":" is not a valid symbol. Also it is a problem because I use XMlDocument and it only works with XMlNode and XMlAttribute. It does not work with XAttribute.

Now I have over 400 lines of codes and I just want to set this namespace and I am done with the doc. Is there an easy way of doing it?

Upvotes: 1

Views: 595

Answers (3)

jdweng
jdweng

Reputation: 34421

The following works :

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

namespace ConsoleApplication1
{
    class Program
    {
        const string FILENAME = @"c:\temp\test.xml";
         static void Main(string[] args)
         {
             string xmlHeader = "<?xml version=\"1.0\" encoding=\"utf-8\" ?><root></root>";
             XDocument doc = XDocument.Parse(xmlHeader);
             XElement root = doc.Root;

             XElement paymentmethodType = XElement.Parse("<PaymentMethod xmlns:xsi=\"w3.org/2001/XMLSchema-instance\" xsi:type=\"CreditTransferType\"/>");
             root.Add(paymentmethodType);

             doc.Save(FILENAME);
         }
    }
}

Upvotes: 1

grozdeto
grozdeto

Reputation: 1369

So I used option 3 as dim suggested.

What I did so I do not have to rewrite the whole lot was to create a second document that loads the XML.

Then the first doc imports the node from the second doc and appends it to the root element and it works fine. 

            XmlDocument doc2 = new XmlDocument();


            XNamespace ns = XNamespace.Get("http://www.w3.org/2001/XMLSchema-instance");


             XElement paymentMethodEl =  new XElement("PaymentMethod",


                  new XAttribute(XNamespace.Xmlns + "xsi", "http://www.w3.org/2001/XMLSchema-instance"),

                  new XAttribute(ns + "type", "CreditTransferType"));

            doc2.LoadXml(paymentMethodEl.ToString());

            XmlWriter writer2 = XmlWriter.Create(Path.Combine(Settings.Default.InvoiceXmlFolder, "doc2.xml"), settings);
            doc2.Save(writer2);
            XmlNode paymentMethod = doc.ImportNode(doc2.FirstChild, true);
            rootNode.AppendChild(paymentMethod);

Upvotes: 0

dim
dim

Reputation: 45

I don't know about Option 1 and Option 2 but for Option 3 - What you have to do is Get the namespace first, then use the namespace to assign type. Because that namespace is xmlns:xsi , you assign it type it will automatically match to xsi:type. In short here is the code:

            XNamespace ns = XNamespace.Get("http://www.w3.org/2001/XMLSchema-instance");


              new XElement("PaymentMethod",


                  new XAttribute(XNamespace.Xmlns + "xsi", "http://www.w3.org/2001/XMLSchema-instance"),

                  new XAttribute(ns + "type", "CreditTransferType"));

Upvotes: 1

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