避免在.net DataContractSerializer中使用" http://www.w3.org/2001/XM

本文关键字:www w3 org XM 2001 http net DataContractSerializer | 更新日期: 2023-09-27 17:52:54

我有一系列的类,我正在使用。net 4.0中的。net的DataContractSerializer将它们转换为XML。序列化工作得很好,以后我可以毫无困难地解析XML并重新创建。net对象。

然而,大多数DataMember不是必需的。[DataMember(IsRequired = false)]。这在反序列化XML时非常有效,在这种情况下,您可以忽略文档中的XML节点,但是在将现有对象序列化为XML时,DataContractSerializer坚持将具有空值的属性作为带有属性(例如 )的节点写出来。
[DataContract(Name = "response", Namespace = "http://domain.com/name")]
public class MyResponseClass
{
    [DataMember(Name = "count", IsRequired = true, Order = 0)]
    public int Count { get; set; }
    [DataMember(Name = "info", IsRequired = false, Order = 1)]
    public InfoClass Info { get; set; }
    [DataMember(Name = "metadata", IsRequired = false, Order = 2)]
    public MetadataList Metadatas { get; set; }
}

可以从

序列化
<response xmlns="http://domain.com/name">
    <count>4</count>
</response>

但是,如果我序列化对象,它会创建:

<response xmlns="http://domain.com/name" xmlns:i="http://www.w3.org/2001/XmlSchema-instance">
    <count>4</count>
    <info i:nil="true" />
    <metadata i:nil="true" />
</response>

是否有任何方法可以让DataContractSerializer不写节点,而不是当它有一个空值?

避免在.net DataContractSerializer中使用

使用EmitDefaultValue = false跳过XML中的默认值:

[DataContract(Name = "response", Namespace = "http://domain.com/name")]
public class MyResponseClass 
{
    [DataMember(Name = "count", IsRequired = true, Order = 0, EmitDefaultValue = false)]
    public int Count { get; set; }
    [DataMember(Name = "info", IsRequired = false, Order = 1, EmitDefaultValue = false)]
    public InfoClass Info { get; set; }
    [DataMember(Name = "metadata", IsRequired = false, Order = 2, EmitDefaultValue = false)]
    public MetadataList Metadatas { get; set; }
}

要删除xmlns:i="http://www.w3.org/2001/XmlSchema-instance",您必须使用例如Replace(),如以下示例

public void Write(string filePath, MyResponseClass myResponse)
{
    var serializer = new DataContractSerializer(typeof(MyResponseClass));
    var sb = new StringBuilder();
    using (var writer = new StringWriter(sb))
    using (var xmlWriter = XmlWriter.Create(writer))
    {
        serializer.WriteObject(xmlWriter, myResponse);
    }
    using (StreamWriter stream = new StreamWriter(filePath))
    {
        sb = sb.Replace(" xmlns:i='"http://www.w3.org/2001/XMLSchema-instance'"", "");
        stream.Write(sb);
    }
}

with regards:)

(我在错误的问题中意外地发布了这个答案,但我认为它在这里也很有帮助,所以我现在不删除它)

[DataContract(Namespace = "")]
在每个类的顶部加上

使它更好看。它删除了数据契约名称空间和难看的节点前缀。但是,标准名称空间保留了下来。这对我来说还可以。

:

<?xml version="1.0" encoding="utf-8"?>
<root xmlns:i="http://www.w3.org/2001/XMLSchema-instance"
  xmlns="http://schemas.datacontract.org/2004/07/MyClassname">
  <prop1>true</prop1>
  <prop2 xmlns:d2p1="http://schemas.datacontract.org/2004/07/MySubclassname">
    <d2p1:sub>true</d2p1:sub>
  </prop2>
</root>
:后

<?xml version="1.0" encoding="utf-8"?>
<root xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
  <prop1>true</prop1>
  <prop2>
    <sub>true</sub>
  </prop2>
</root>