使用 DataContractSerializer 序列化没有命名空间的对象

问题描述

如何从使用 DataContractSerializer 序列化的对象的 XML 表示中删除 XML 命名空间?

How do I remove XML namespaces from an object's XML representation serialized using DataContractSerializer?

该对象需要序列化为一个非常简单的输出 XML.

That object needs to be serialized to a very simple output XML.

• 最新 &最好的 - 使用 .Net 4 beta 2
• 永远不需要反序列化对象.
• XML 不应有任何 xmlns:...命名空间引用
• 需要支持 Exception 和 ISubObject 的任何子类型.
• 更改原始对象将非常困难.

对象:

 [Serializable] 
 class MyObj
 {
     string str;
     Exception ex;
     ISubObject subobj;
 } 

需要序列化成:

<xml>
  <str>...</str>
  <ex i:nil="true" />
  <subobj i:type="Abc">
     <AbcProp1>...</AbcProp1>
     <AbcProp2>...</AbcProp2>
  </subobj>
</xml>

我使用了这个代码:

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();
    }
}

来自 这篇文章我采用了一个DataContractResolver，因此不必声明子类型:

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);
    }
}

推荐答案

你需要标记你想要序列化的类:

You need to mark the classes you want to serialize with:

[DataContract(Namespace="")]

在这种情况下，数据协定序列化程序不会为您的序列化对象使用任何命名空间.

In that case, the data contract serializer will not use any namespace for your serialized objects.

马克

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