XML Serialization in C# without XML attribute nodes

I have an XML document format from a legacy system that I have to support in a future application. I want to be able to both serialize and deserialize the XML between XML and C# objects, however, using the objects generated by xsd.exe, the C# serialization includes the xmlns:xsi..., xsi:... etc XML attributes on the root element of the document that gets generated. Is there开发者_运维百科 anyway to disable this so that absolutely no XML attribute nodes get put out in the resulting XML ? The XML document should be elements only.

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Duplicate? XmlSerializer: remove unnecessary xsi and xsd namespaces

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Yes, use the XmlSerializerNamespaces class.

Example:

  var s= new System.Xml.Serialization.XmlSerializer(typeof(TypeToSerialize));
  var ns= new System.Xml.Serialization.XmlSerializerNamespaces();
  ns.Add( "", "");
  System.IO.StreamWriter writer= System.IO.File.CreateText(filePath);
  s.Serialize(writer, objectToSerialize, ns);
  writer.Close();

See also: XmlSerializer: remove unnecessary xsi and xsd namespaces

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There is no way to force XML Serializer to ignore xsi attributes (unless you implement IXmlSerializable and force custom serialization or use XmlAttributeOverrides). However the only time xsi: attributes show up is when you have a nullable element. If you do need to use nullable elements you can of course post-process the XML to remove all xsi: occurences. However if you do this think about how you will deserialize the XML back into an object, if xsi:nil is missing on an element and the element is defined as a nullable integer you will run into an exception.

@Cheeso, please correct me if i am wrong.

I have the following code.

  public class TestSer
    {
        public int? MyProperty { get; set; }   
    }





    TestSer ser = new TestSer();
    ser.MyProperty = null;

    StringBuilder bldr = new StringBuilder();
    var ns = new System.Xml.Serialization.XmlSerializerNamespaces();
    ns.Add("", "");
    XmlSerializer s = new XmlSerializer(typeof(TestSer));
    using (StringWriter writer = new StringWriter(bldr))
    {
        s.Serialize(writer, ser, ns);
    }

I get the following output.

<?xml version="1.0" encoding="utf-16"?>
<TestSer>
  <MyProperty d2p1:nil="true" xmlns:d2p1="http://www.w3.org/2001/XMLSchema-instance" />
</TestSer>

This isn't exactly element only as the question asks for.