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PORemoving namespaces for known types when serializing with DataContractSerializer
 

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  1. PORemoving namespaces for known types when serializing with DataContractSerializer
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    <p>I have a dictionary class that implements IXmlSerializable with custom WriteXml and ReadXml implementation. (Full code below) When I serialize it using DataContractSerializer, the output contains namespaces for general known types such as int, long, string etc. As shown:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-16"?&gt; &lt;MyDictionary&gt; &lt;DictionaryItem Key="myInteger"&gt; &lt;Value&gt; &lt;int xmlns="http://schemas.microsoft.com/2003/10/Serialization/"&gt;4&lt;/int&gt; &lt;/Value&gt; &lt;/DictionaryItem&gt; &lt;DictionaryItem Key="myLong"&gt; &lt;Value&gt; &lt;long xmlns="http://schemas.microsoft.com/2003/10/Serialization/"&gt;5&lt;/long&gt; &lt;/Value&gt; &lt;/DictionaryItem&gt; &lt;DictionaryItem Key="myString"&gt; &lt;Value&gt; &lt;string xmlns="http://schemas.microsoft.com/2003/10/Serialization/"&gt;testing&lt;/string&gt; &lt;/Value&gt; &lt;/DictionaryItem&gt; &lt;/MyDictionary&gt; </code></pre> <p>How can I remove it so that it looks like the below? Thanks!</p> <pre><code>&lt;?xml version="1.0" encoding="utf-16"?&gt; &lt;MyDictionary&gt; &lt;DictionaryItem Key="myInteger"&gt; &lt;Value&gt; &lt;int&gt;4&lt;/int&gt; &lt;/Value&gt; &lt;/DictionaryItem&gt; &lt;DictionaryItem Key="myLong"&gt; &lt;Value&gt; &lt;long&gt;5&lt;/long&gt; &lt;/Value&gt; &lt;/DictionaryItem&gt; &lt;DictionaryItem Key="myString"&gt; &lt;Value&gt; &lt;string&gt;testing&lt;/string&gt; &lt;/Value&gt; &lt;/DictionaryItem&gt; &lt;/MyDictionary&gt; </code></pre> <p>The test code I used to create the output:</p> <pre><code>private void button1_Click(object sender, EventArgs e) { MyDictionary myDictionary = new MyDictionary(); myDictionary.Add("myInteger", 4); Int64 myLong = 5; myDictionary.Add("myLong", myLong); myDictionary.Add("myString", "testing"); string outputXml = GetXmlForObject(myDictionary); System.IO.File.WriteAllText(@"C:\outputXml.txt", outputXml); } public static string GetXmlForObject(Object obj) { try { DataContractSerializer serializer = new DataContractSerializer(obj.GetType()); StringBuilder builder = new StringBuilder(); XmlWriterSettings xmlWriterSettings = new XmlWriterSettings(); xmlWriterSettings.NamespaceHandling = NamespaceHandling.OmitDuplicates; xmlWriterSettings.Indent = true; using (XmlWriter writer = XmlWriter.Create(builder, xmlWriterSettings)) { serializer.WriteObject(writer, obj); } return builder.ToString(); } catch (Exception exception) { return String.Empty; } } </code></pre> <p>Full code below:</p> <pre><code>[XmlRoot(Namespace = "")] public class MyDictionary : Dictionary&lt;String, Object&gt;, IXmlSerializable, ISerializable { public System.Xml.Schema.XmlSchema GetSchema() { throw new NotImplementedException("The method is not implemented."); } public void ReadXml(System.Xml.XmlReader reader) { try { string key = null; object value = null; if (reader.IsStartElement() &amp;&amp; !reader.IsEmptyElement) { reader.ReadStartElement(); while (reader.NodeType != XmlNodeType.EndElement) { key = reader.GetAttribute("Key"); string typeAttribute = reader.GetAttribute("Null"); reader.ReadStartElement("DictionaryItem"); if (reader.IsEmptyElement) { this.Add(key, null); reader.ReadStartElement(); } else { reader.ReadStartElement("Value"); value = GetValueDeserializer(reader.LocalName).ReadObject(reader.ReadSubtree()); this.Add(key, value); reader.Skip(); // skipping in case the string is empty or null reader.ReadEndElement(); // Reading end node for Value } reader.ReadEndElement(); // Reading end node for element in the list } reader.ReadEndElement(); } } catch (XmlException e) { throw new XmlException("ReadXml(XmlReader) reader pointing to invalid element", e); } } private DataContractSerializer GetValueDeserializer(string typeStr) { Type valueType = GetTypeFromStratusType(typeStr); return new DataContractSerializer(valueType); } public static Type GetTypeFromStratusType(string typeStr) { Type valueType; switch (typeStr) { case "short": valueType = typeof(Int16); break; case "int": valueType = typeof(Int32); break; case "long": valueType = typeof(Int64); break; case "string": valueType = typeof(String); break; default: valueType = typeof(String); break; } return valueType; } public void WriteXml(System.Xml.XmlWriter writer) { foreach (KeyValuePair&lt;String, Object&gt; item in this) { writer.WriteStartElement("DictionaryItem"); writer.WriteAttributeString("Key", item.Key.ToString()); if (item.Value != null) { writer.WriteStartElement("Value"); DataContractSerializer serializer = new DataContractSerializer(item.Value.GetType()); serializer.WriteObject(writer, item.Value); } else { writer.WriteStartElement("Value"); } writer.WriteEndElement(); writer.WriteEndElement(); } } } </code></pre>
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