Deserializing XML with DataContractSerializer

.net, c#, datacontractserializer, xml

Solution

DataContractSerializer expects things to be in alphabetical order. You need to add `Order` to your Data Members for this to work correctly.

[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; }
}

Problem

I have a web service that returns the following data: ``` <?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> ``` I have a class structure to match: ``` [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; } } ``` My deserialization code looks like this: ``` [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); } ``` For the life of me I can't figure out why StreetAddress is failing. It's got to be something simple that I'm missing.

Original source

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