How do I remove XML
namespaces from an object's XML representation serialized using DataContractSerializer?
That object needs to be serialized to a very simple output XML.
Latest & greatest - using .Net 4 beta 2
The object will never need to be deserialized.
XML should not have any xmlns:... namespace refs
Any subtypes of Exception and ISubObject need to be supported.
It will be very difficult to change the original object.
Object:
[Serializable]
class MyObj
{
string str;
Exception ex;
ISubObject subobj;
}
Need to serialize into:
<xml>
<str>...</str>
<ex i:nil="true" />
<subobj i:type="Abc">
<AbcProp1>...</AbcProp1>
<AbcProp2>...</AbcProp2>
</subobj>
</xml>
I used this code:
private static string ObjectToXmlString(object obj)
{
if (obj == null) throw new ArgumentNullException("obj");
var serializer =
new DataContractSerializer(
obj.GetType(), null, Int32.MaxValue, false, false, null,
new AllowAllContractResolver());
var sb = new StringBuilder();
using (var xw = XmlWriter.Create(sb, new XmlWriterSettings
{
OmitXmlDeclaration = true,
NamespaceHandling = NamespaceHandling.OmitDuplicates,
Indent = true
}))
{
serializer.WriteObject(xw, obj);
xw.Flush();
return sb.ToString();
}
}
From this article I adopted a DataContractResolver so that no subtypes have to be declared:
public class AllowAllContractResolver : DataContractResolver
{
public override bool TryResolveType(Type dataContractType, Type declaredType, DataContractResolver knownTypeResolver, out XmlDictionaryString typeName, out XmlDictionaryString typeNamespace)
{
if (!knownTypeResolver.TryResolveType(dataContractType, declaredType, null, out typeName, out typeNamespace))
{
var dictionary = new XmlDictionary();
typeName = dictionary.Add(dataContractType.FullName);
typeNamespace = dictionary.Add(dataContractType.Assembly.FullName);
}
return true;
}
public override Type ResolveName(string typeName, string typeNamespace, Type declaredType, DataContractResolver knownTypeResolver)
{
return knownTypeResolver.ResolveName(typeName, typeNamespace, declaredType, null) ?? Type.GetType(typeName + ", " + typeNamespace);
}
}
