使用DataContractSerializer反序列化XML

本文关键字：XML 反序列化 DataContractSerializer 使用 | 更新日期: 2023-09-27 18:04:07

我有一个web服务，它返回以下数据:

<?xml version=""1.0"" encoding=""UTF-8""?>
<RESPONSE>
    <KEY>12345</KEY>
    <PROPERTY>
        <PROPERTY_ADDRESS>
            <STREET_NUM>25</STREET_NUM>
            <STREET_ADDRESS>ELM ST</STREET_ADDRESS>
            <STREET_PREFIX/>
            <STREET_NAME>ELM</STREET_NAME>
            <STREET_TYPE>ST</STREET_TYPE>
            <STREET_SUFFIX/>
        </PROPERTY_ADDRESS>
    </PROPERTY>
</RESPONSE>

我有一个类结构来匹配:

[DataContract(Name="RESPONSE", Namespace="")]
public class Response
{
    [DataMember(Name="KEY")]
    public string Key { get; set; }
    [DataMember(Name = "PROPERTY")]
    public Property Property { get; set; }
}
[DataContract(Name="PROPERTY", Namespace="")]
public class Property
{
    [DataMember(Name="PROPERTY_ADDRESS")]
    public PropertyAddress Address { get; set; }
}

[DataContract(Name="PROPERTY_ADDRESS", Namespace="")]
public class PropertyAddress
{
    [DataMember(Name="STREET_NUM")]
    public string StreetNumber { get; set; }
    [DataMember(Name = "STREET_ADDRESS")]
    public string StreetAddress { get; set; }
    [DataMember(Name = "STREET_PREFIX")]
    public string StreetPrefix { get; set; }
    [DataMember(Name = "STREET_NAME")]
    public string StreetName { get; set; }
    [DataMember(Name = "STREET_TYPE")]
    public string StreetType { get; set; }
    [DataMember(Name = "STREET_SUFFIX")]
    public string StreetSuffix { get; set; }
}

我的反序列化代码看起来像这样:

[Test]
public void TestMapping()
{
    var serializer = new DataContractSerializer(typeof(Response));
    Response response = null;
    using (var ms = new MemoryStream(Encoding.UTF8.GetBytes(XmlData)))
    {
        response = (Response)serializer.ReadObject(ms);
    }
    //This works
    Assert.AreEqual("12345", response.Key);
    //This works
    Assert.AreEqual("25", response.Property.Address.StreetNumber);
    //This FAILS. StreetAddress is null
    Assert.AreEqual("ELM ST", response.Property.Address.StreetAddress);
}

无论如何我都弄不明白为什么StreetAddress失败了。

使用DataContractSerializer反序列化XML

DataContractSerializer期望内容按字母顺序排列。您需要将Order添加到您的数据成员中才能正常工作。

[DataContract(Name = "PROPERTY_ADDRESS", Namespace = "")]
public class PropertyAddress
{
    [DataMember(Name = "STREET_NUM", Order=0)]
    public string StreetNumber { get; set; }
    [DataMember(Name = "STREET_ADDRESS", Order=1)]
    public string StreetAddress { get; set; }
    [DataMember(Name = "STREET_PREFIX", Order=2)]
    public string StreetPrefix { get; set; }
    [DataMember(Name = "STREET_NAME", Order=3)]
    public string StreetName { get; set; }
    [DataMember(Name = "STREET_TYPE", Order=4)]
    public string StreetType { get; set; }
    [DataMember(Name = "STREET_SUFFIX",Order=5)]
    public string StreetSuffix { get; set; }
}

您必须用元素的顺序来扩充您的数据契约，因为DataContractSerializer期望元素在默认情况下按字母顺序排序。这与您的XML不同。

代码如下:

[DataContract(Name = "PROPERTY_ADDRESS", Namespace = "")]
public class PropertyAddress
{
    [DataMember(Name = "STREET_NUM", Order=1)]
    public string StreetNumber { get; set; }
    [DataMember(Name = "STREET_ADDRESS", Order=2)]
    public string StreetAddress { get; set; }
    [DataMember(Name = "STREET_PREFIX", Order=3)]
    public string StreetPrefix { get; set; }
    [DataMember(Name = "STREET_NAME", Order=4)]
    public string StreetName { get; set; }
    [DataMember(Name = "STREET_TYPE", Order=5)]
    public string StreetType { get; set; }
    [DataMember(Name = "STREET_SUFFIX", Order=6)]
    public string StreetSuffix { get; set; }
}
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