.Net XmlSerializer:反序列化CDATA为内部文本

时间:2008-12-29 03:32:22

标签: c# .net xml-serialization cdata

我使用标准的.Net XmlSerializer来解决CDATA反序列化问题。

更新:我从外部系统获取XML并且我不能影响它的格式,因此我无法将CData包含在单独的属性元素中。

序列化给出了这个:

<?xml version="1.0" encoding="utf-16"?>
<MyClass xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><![CDATA[Hello, world!]]></MyClass>

反序列化不会将对象恢复为原始状态。

这是序列化的类:

public class MyClass
{
    string _data;

    [XmlIgnore]
    public string Data
    {
        get { return _data; }
        set { _data = value; }
    }

    [XmlAnyElement]
    public XmlCDataSection CData
    {
        get { return new XmlDataDocument().CreateCDataSection(Data); }
        set { Data = value.Value; }
    }
}

这是失败的测试:

[Test]
public void CData_as_inner_text_test()
{
    MyClass item = new MyClass();

    item.Data = "Hello, world!";

    XmlSerializer serializer = new XmlSerializer(item.GetType());
    string serialized;

    using (StringWriter sw = new StringWriter())
    {
        serializer.Serialize(sw, item);
        serialized = sw.GetStringBuilder().ToString();
    }

    MyClass deserialized;

    using (StringReader sr = new StringReader(serialized))
    {
        deserialized = (MyClass)serializer.Deserialize(sr);
    }

    Assert.AreEqual(item.Data, deserialized.Data); // For some reason, deserialized.Data == null
}

我在这里发现了同样的问题,但没有答案: XmlSerializer, XmlAnyElement and CDATA

2 个答案:

答案 0 :(得分:9)

CData属性最终为null,因为CDATA部分的内容最终会在Data属性中被忽略...

<MyClass><![CDATA[Hello, world!]]></MyClass>

绝对等同于:

<MyClass>Hello, world!</MyClass>

您不应该关心外部应用程序是否将MyClass的内容写为CData。同样,外部应用程序不应该关心你如何写出来。

IOW,这应该就是你所需要的:

public class MyClass
{
    string _data;

    [XmlText]
    public string Data
    {
        get { return _data; }
        set { _data = value; }
    }
}

答案 1 :(得分:0)

首先将属性声明为XmlCDataSection

public XmlCDataSection ProjectXml { get; set; }

在这种情况下,projectXml是一个字符串xml

ProjectXml = new XmlDocument().CreateCDataSection(projectXml);

当你序列化你的消息时,你会得到你很好的格式(通知)

<?xml version="1.0" encoding="utf-16"?>
<MessageBase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xsi:type="Message_ProjectStatusChanged">
  <ID>131</ID>
  <HandlerName>Plugin</HandlerName>
  <NumRetries>0</NumRetries>
  <TriggerXml><![CDATA[<?xml version="1.0" encoding="utf-8"?><TmData xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" Version="9.0.0" Date="2012-01-31T15:46:02.6003105" Format="1" AppVersion="10.2.0" Culture="en-US" UserID="0" UserRole=""><PROJECT></PROJECT></TmData>]]></TriggerXml>
  <MessageCreatedDate>2012-01-31T20:28:52.4843092Z</MessageCreatedDate>
  <MessageStatus>0</MessageStatus>
  <ProjectId>0</ProjectId>
  <UserGUID>8CDF581E44F54E8BAD60A4FAA8418070</UserGUID>
  <ProjectGUID>5E82456F42DC46DEBA07F114F647E969</ProjectGUID>
  <PriorStatus>0</PriorStatus>
  <NewStatus>3</NewStatus>
  <ActionDate>0001-01-01T00:00:00</ActionDate>
</MessageBase>