將xml節點的屬性反序列化為class

Question

我有兩個看起來像這樣的類：

[XmlRoot("Foo")]
public class Foo
{
    [XmlArray("BarResponse")]
    [XmlArrayItem("Bar")]
    public List<Bar> bar {get; set;}
    //some other elements go here.
}

[XmlRoot("Bar")]
public class Bar
{
    [XmlAttribute("id")]
    public Int32 Id {get; set;}
    //some other elements go here.
}

我收到的xml如下所示：

<?xml version="1.0"?>
<Foo>
    <BarResponse>
        <Bar id="0" />
        <Bar id="1" />
    </BarResponse>
</Foo>

當我嘗試對其進行反序列化時，我得到了“ Foo”類的實例，bar中有一個元素，其所有屬性均為null或default。 我要去哪里錯了？

Answer 1

嘗試這個：

[TestFixture]
public class BilldrTest
{
    [Test]
    public void SerializeDeserializeTest()
    {
        var foo = new Foo();
        foo.Bars.Add(new Bar { Id = 1 });
        foo.Bars.Add(new Bar { Id = 2 });
        var xmlSerializer = new XmlSerializer(typeof (Foo));
        var stringBuilder = new StringBuilder();
        using (var stringWriter = new StringWriter(stringBuilder))
        {
            xmlSerializer.Serialize(stringWriter, foo);
        }
        string s = stringBuilder.ToString();
        Foo deserialized;
        using (var stringReader = new StringReader(s))
        {
            deserialized = (Foo) xmlSerializer.Deserialize(stringReader);
        }
        Assert.AreEqual(2,deserialized.Bars.Count);
    }
}

[XmlRoot("Foo")]
public class Foo
{
    public Foo()
    {
        Bars= new List<Bar>();
    }
    [XmlArray("BarResponses")]
    [XmlArrayItem(typeof(Bar))]
    public List<Bar> Bars { get; set; }
    //some other elements go here.
}

[XmlRoot("Bar")]
public class Bar
{
    [XmlAttribute("id")]
    public Int32 Id { get; set; }
    //some other elements go here.
}

• 您可以在此處找到有關使用XmlRoot的信息
• 如果您希望數組包含不同的類型，則使用ArrayItemAttribute

除去[XmlAttribute（“ id”）]之外的所有屬性，您將得到相同的結果，但是我想這是從所有這些都合理的上下文中摘錄的。

Answer 2

您需要為Foo類添加一個默認的構造函數，以實例化List<Bar> 。

[Serializable]
public class Foo
{
    public Foo()
    {
        Bar = new List<Bar>();
    }

    [XmlArray("BarResponse")]
    [XmlArrayItem("Bar")]
    public List<Bar> Bar { get; set; }
}

[Serializable]
public class Bar
{
    [XmlAttribute("id")]
    public Int32 Id { get; set; }
}

將xml寫入/讀取為：

<?xml version="1.0" encoding="utf-8"?>
<Foo xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <BarResponse>
    <Bar id="0" />
    <Bar id="1" />
  </BarResponse>
</Foo>