XmlSerializer problem with prefix and namespace

Adjusted C# Code

1. Define Classes with Proper Namespace Prefixes:
   • Use XmlType and XmlElement attributes to specify namespaces.
   • Use XmlSerializerNamespaces to add namespace prefixes.

using System;

using System.IO;

using System.Xml.Serialization;

public class ZCOATINGORDER

{

    [XmlElement(ElementName = "IM_BACK")]

    public string IMBACK { get; set; }

}

public class Body

{

    [XmlElement(ElementName = "Z_COATING_ORDER", Namespace = "urn:sap-com:document:sap:rfc:functions")]

    public ZCOATINGORDER ZCOATINGORDER { get; set; }

}

[XmlRoot(ElementName = "COM_1", Namespace = "urn:biztalk-org:biztalk:biztalk_1")]

public class COM1

{

    [XmlElement(ElementName = "body")]

    public Body Body { get; set; }

    [XmlNamespaceDeclarations]

    public XmlSerializerNamespaces Namespaces { get; set; }

    public COM1()

    {

        Namespaces = new XmlSerializerNamespaces();

        Namespaces.Add("q1", "urn:biztalk-org:biztalk:biztalk_1");

        Namespaces.Add("doc", "urn:sap-com:document:sap:rfc:functions");

    }

}

2. Serialize to XML:
   • Serialize the COM1 object to XML using XmlSerializer.

public class Program

{

    public static void Main()

    {

        // Create the object with the data to serialize

        var com1 = new COM1

        {

            Body = new Body

            {

                ZCOATINGORDER = new ZCOATINGORDER

                {

                    IMBACK = "#_DATA_#"

                }

            }

        };

        // Serialize the object to XML

        var serializer = new XmlSerializer(typeof(COM1));

        using (var stringWriter = new StringWriter())

        {

            serializer.Serialize(stringWriter, com1);

            var xmlString = stringWriter.ToString();

            Console.WriteLine(xmlString);

        }

    }

}

Output:

The above code will produce the following XML:

<?xml version="1.0" encoding="utf-16"?>

<q1:COM_1 xmlns:q1="urn:biztalk-org:biztalk:biztalk_1" xmlns:doc="urn:sap-com:document:sap:rfc:functions">

  <q1:body>

    <doc:Z_COATING_ORDER>

      <IM_BACK>#_DATA_#</IM_BACK>

    </doc:Z_COATING_ORDER>

  </q1:body>

</q1:COM_1>

This XML matches the desired output format, including the namespace prefixes for COM_1 and Z_COATING_ORDER.

Hi @Noah Aas , Welcome to Microsoft Q&A,

It is possible to make some tweaks to the C# class and use 'XmlSerializer' for serialization.

using System;
using System.Xml.Serialization;
using System.IO;

public class ZCOATINGORDER
{
    [XmlElement(ElementName = "IM_BACK")]
    public string IMBACK { get; set; }
}

[XmlRoot(ElementName = "body")]
public class Body 
{
    [XmlElement(ElementName = "Z_COATING_ORDER", Namespace = "urn:sap-com:document:sap:rfc:functions")]
    public ZCOATINGORDER ZCOATINGORDER { get; set; }
}

[XmlRoot("COM_1", Namespace = "urn:biztalk-org:biztalk:biztalk_1")]
public class COM1
{
    [XmlElement(ElementName = "body")]
    public Body Body { get; set; }

    private XmlSerializerNamespaces _Namespaces;
    public XmlSerializerNamespaces NameSpaces
    {
        get
        {
            if (_Namespaces == null)
            {
                _Namespaces = new XmlSerializerNamespaces();
                _Namespaces.Add("q1", "urn:biztalk-org:biztalk:biztalk_1");
                _Namespaces.Add("doc", "urn:sap-com:document:sap:rfc:functions");
            }
            return _Namespaces;
        }
    }
}

Serialize to XML

public class Program
{
    public static void Main(string[] args)
    {
        COM1 com1 = new COM1
        {
            Body = new Body
            {
                ZCOATINGORDER = new ZCOATINGORDER
                {
                    IMBACK = "Rü-TEST"
                }
            }
        };

        XmlSerializer serializer = new XmlSerializer(typeof(COM1));

        XmlWriterSettings settings = new XmlWriterSettings
        {
            Indent = true,
            OmitXmlDeclaration = true
        };

        using (StringWriter textWriter = new StringWriter())
        {
            using (XmlWriter xmlWriter = XmlWriter.Create(textWriter, settings))
            {
                serializer.Serialize(xmlWriter, com1, com1.NameSpaces);
            }

            string xmlOutput = textWriter.ToString();
            Console.WriteLine(xmlOutput);
        }
    }
}

Output:

<q1:COM_1 xmlns:q1="urn:biztalk-org:biztalk:biztalk_1">
  <q1:body>
    <doc:Z_COATING_ORDER xmlns:doc="urn:sap-com:document:sap:rfc:functions">
      <IM_BACK>Rü-TEST</IM_BACK>
    </doc:Z_COATING_ORDER>
  </q1:body>
</q1:COM_1>

Best Regards,

Jiale

If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". 

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.