c# - XmlSerializer 奇怪的东西

Question

对不起我的英语。我有 XmlSerializer 的奇怪之处。这是我的代码

[Serializable]
public class Radio
{
    public bool hasSubWoofers;
    public double[] stationPresets;

    [XmlIgnoreAttribute]
    public string radioId = "X-3454";
}

[Serializable]
public class Car
{
    public Radio radio = new Radio();
    public int speed;
}

[Serializable]
public class JamesBondCar : Car
{
    public bool canFly;
    public bool canSubmerge;

    private string flag = "string flag";
}

JamesBondCar 类具有私有(private)成员“flag”，在序列化期间 XmlSerializer 不应对其进行序列化。在 XML 中，我正在寻找它。没有“标志”字段:

<JamesBondCar xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <radio>
    <hasSubWoofers>true</hasSubWoofers>
    <stationPresets>
      <double>192.3</double>
      <double>45.2</double>
      <double>456.3</double>
    </stationPresets>
  </radio>
  <speed>342</speed>
  <canFly>true</canFly>
  <canSubmerge>false</canSubmerge>
</JamesBondCar>

但是，这是主要功能:

            JamesBondCar bond = new JamesBondCar();
            bond.canFly = true;
            bond.canSubmerge = false;
            bond.speed = 342;
            bond.radio.hasSubWoofers = true;
            bond.radio.stationPresets = new double[] { 192.3, 45.2, 456.3 };
            bond.radio.radioId = "Y-3424";

            FileStream fs = new FileStream("car.xml", FileMode.Create, FileAccess.Write);
            XmlSerializer serializer = new XmlSerializer(typeof(JamesBondCar));
            serializer.Serialize(fs, bond);
            fs.Close();

            FileStream fs2 = new FileStream("car.xml", FileMode.Open, FileAccess.Read);
            JamesBondCar jcar = (JamesBondCar)serializer.Deserialize(fs2);

在调试中序列化后，我可以在 jcar 实例的“标志”字段中找到它，它具有“字符串标志”值。这怎么可能？ XML 没有这个值。

Answer 1

任何具有此类默认值的私有(private)成员字段都将在构造对象时(即调用对象构造函数时)使用这些默认值进行初始化。