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POSerializing object with no namespaces using DataContractSerializer
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  1. POSerializing object with no namespaces using DataContractSerializer
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    copied!<p>How do I remove XML namespaces from an object's XML representation serialized using DataContractSerializer?</p> <p>That object needs to be serialized to a very simple output XML.</p> <ul> <li>Latest &amp; greatest - using .Net 4 beta 2</li> <li>The object will never need to be deserialized.</li> <li>XML should not have any xmlns:... namespace refs</li> <li>Any subtypes of Exception and ISubObject need to be supported.</li> <li>It will be very difficult to change the original object.</li> </ul> <p>Object:</p> <pre><code> [Serializable] class MyObj { string str; Exception ex; ISubObject subobj; } </code></pre> <p>Need to serialize into:</p> <pre><code>&lt;xml&gt; &lt;str&gt;...&lt;/str&gt; &lt;ex i:nil="true" /&gt; &lt;subobj i:type="Abc"&gt; &lt;AbcProp1&gt;...&lt;/AbcProp1&gt; &lt;AbcProp2&gt;...&lt;/AbcProp2&gt; &lt;/subobj&gt; &lt;/xml&gt; </code></pre> <p>I used this code:</p> <pre><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(); } } </code></pre> <p>From <a href="http://blogs.msdn.com/youssefm/archive/2009/06/05/introducing-a-new-datacontractserializer-feature-the-datacontractresolver.aspx" rel="noreferrer">this article</a> I adopted a DataContractResolver so that no subtypes have to be declared:</p> <pre><code>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); } } </code></pre>
 

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