wcf client ignores derived types during deserialization

Question

I'm using a standard wsdl (located here) to communicate with a service (OpenXDS). I created a service reference from it, which generated a very large Reference.cs file. There is a type hierarchy in the file like this:

public partial class ExtrinsicObjectType : RegistryObjectType

. . .

[System.Xml.Serialization.XmlIncludeAttribute(typeof(ExtrinsicObjectType))]
public partial class RegistryObjectType : IdentifiableType

. . .

[System.Xml.Serialization.XmlIncludeAttribute(typeof(RegistryObjectType))]
[System.Xml.Serialization.XmlIncludeAttribute(typeof(ExtrinsicObjectType))]
public partial class IdentifiableType : object

All three types have the same XmlType:

[System.Xml.Serialization.XmlTypeAttribute(Namespace="urn:oasis:names:tc:ebxml-regrep:xsd:rim:3.0")]

There is a collection in the Response type of IdentifiableType objects:

[System.Xml.Serialization.XmlArrayAttribute(Namespace="urn:oasis:names:tc:ebxml-regrep:xsd:rim:3.0", Order=0)]
[System.Xml.Serialization.XmlArrayItemAttribute("Identifiable", IsNullable=false)]
public IdentifiableType[] RegistryObjectList {

When the service actually responds, it gives a collection of ExtrinsicObject elements:

<rim:RegistryObjectList xmlns:rim="urn:oasis:names:tc:ebxml-regrep:xsd:rim:3.0">
  <ns1:ExtrinsicObject xmlns:ns1="urn:oasis:names:tc:ebxml-regrep:xsd:rim:3.0" ...
  <ns1:ExtrinsicObject xmlns:ns1="urn:oasis:names:tc:ebxml-regrep:xsd:rim:3.0" ...
  <ns1:ExtrinsicObject xmlns:ns1="urn:oasis:names:tc:ebxml-regrep:xsd:rim:3.0" ...
  <ns1:ExtrinsicObject xmlns:ns1="urn:oasis:names:tc:ebxml-regrep:xsd:rim:3.0" ...
  <ns1:ExtrinsicObject xmlns:ns1="urn:oasis:names:tc:ebxml-regrep:xsd:rim:3.0" ...
</rim:RegistryObjectList>

I see these elements in the trace log and I can get the same answer in SoapUI. But when I get the deserialized response back from the client proxy, the RegistryObjectList is empty. It completely ignores the ExtrinsicObject elements.

I can't change the server, and the client is generated by VS2012. It seems like this should just work and I'm missing some setting or something.

Here's the theories I have so far:

There's some setting on the service reference, and if I checked it and updated the code everything would just work.
The wsdl I'm using is different than the wsdl they have agreed to.
I'm going to have to figure out how to manually deserialize the responses.

Any help is appreciated. I've tried to include what I thought was pertinent, but there was a lot of editing since the wsdl, xsd's, and Reference.cs are all fairly large.

What I try in such cases is build a stub C# server yourself from the WSDL and see how the response it sends differs from the one the real server sends. — Yaron Naveh, Sep 04 '13 at 16:29
It seems like it cut off the end. Use https://code.google.com/p/epsos-common-components/source/browse/ihe-profiles/src/wsdl/XCARespondingGatewayQuery.wsdl?r=e6bea12e067eb13d9276b8da7c9667a45ec5685f — qanwi1970, Sep 05 '13 at 23:16

score 0 · Answer 1 · answered Dec 14 '16 at 22:10

I just got this working by passing the following XmlAttributeOverrides to the serializer:

var overrides = new XmlAttributeOverrides();
overrides.Add(typeof(SubmitObjectsRequest), "RegistryObjectList", new XmlAttributes
{
    XmlArray = new XmlArrayAttribute()
    {
        Namespace = "urn:oasis:names:tc:ebxml-regrep:xsd:rim:3.0",
        Order = 0
    },
    XmlArrayItems =
    {
        new XmlArrayItemAttribute("ExtrinsicObject", typeof(ExtrinsicObjectType)) { IsNullable = false },
        new XmlArrayItemAttribute("RegistryPackage", typeof(RegistryPackageType)) { IsNullable = false }
    }
});

From what I understand, Reference.cs, as you said, gives this:

[System.Xml.Serialization.XmlArrayAttribute(Namespace="urn:oasis:names:tc:ebxml-regrep:xsd:rim:3.0", Order=0)]
[System.Xml.Serialization.XmlArrayItemAttribute("Identifiable", IsNullable=false)]
public IdentifiableType[] RegistryObjectList {

But since, in the XML, the RegistryObjectList element does not have Identifiable child nodes, but rather ExtrinsicObject and RegistryPackage children, what I really want is for it to look like this:

[System.Xml.Serialization.XmlArrayAttribute(Namespace="urn:oasis:names:tc:ebxml-regrep:xsd:rim:3.0", Order=0)]
[System.Xml.Serialization.XmlArrayItemAttribute("ExtrinsicObject", typeof(ExtrinsicObjectType), IsNullable=false)]
[System.Xml.Serialization.XmlArrayItemAttribute("RegistryPackage", typeof(RegistryPackageType), IsNullable=false)]
public IdentifiableType[] RegistryObjectList {

And including the overrides gets the serializer to ignore the original attributes and treat RegistryObjectList as if had been decorated with the latter.

wcf client ignores derived types during deserialization

1 Answers1