C#•2y ago

❔ Help deserializing XML file

Hello, I've been trying to deserialize the following XML, using System.Xml, no external libraries:

<?xml version='1.0' encoding='UTF-8'?>
<SOAP-ENV:Envelope 
    xmlns:SOAP-ENV='http://schemas.xmlsoap.org/soap/envelope/'
    xmlns:ns1='urn:WsLMEInet'
    xmlns:xsd='http://www.w3.org/2001/XMLSchema'
    xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'
    xmlns:SOAP-ENC='http://schemas.xmlsoap.org/soap/encoding/'
    SOAP-ENV:encodingStyle='http://schemas.xmlsoap.org/soap/encoding/'>
    <SOAP-ENV:Body>
        <ns1:LMEEvenFecResponse>
            <LMEEvenFecReturn xsi:type='ns1:LMEEvenFecResponse'>
                <Estado xsi:type='xsd:integer'>0</Estado>
                <GloEstado xsi:type='xsd:string'>Sin Error</GloEstado>
                <ListaLicencias SOAP-ENC:arrayType='ns1:LicenciaType[139]' xsi:type='ns1:ListaLicenciasType'>
                    <item xsi:type='ns1:LicenciaType'>
                        <NumLicencia xsi:type='xsd:integer'>2780337</NumLicencia>
                        <DigLicencia xsi:type='xsd:string'>7</DigLicencia>
                        <estado xsi:type='xsd:integer'>1</estado>
                        <fecha xsi:type='xsd:dateTime'>2023-01-04T15:47:17</fecha>
                    </item>
                    <item xsi:type='ns1:LicenciaType'>
                        <NumLicencia xsi:type='xsd:integer'>2780338</NumLicencia>
                        <DigLicencia xsi:type='xsd:string'>5</DigLicencia>
                        <estado xsi:type='xsd:integer'>1</estado>
                        <fecha xsi:type='xsd:dateTime'>2023-01-04T15:47:18</fecha>
                    </item>
                </ListaLicencias>
            </LMEEvenFecReturn>
        </ns1:LMEEvenFecResponse>
    </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

<?xml version='1.0' encoding='UTF-8'?>
<SOAP-ENV:Envelope 
    xmlns:SOAP-ENV='http://schemas.xmlsoap.org/soap/envelope/'
    xmlns:ns1='urn:WsLMEInet'
    xmlns:xsd='http://www.w3.org/2001/XMLSchema'
    xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'
    xmlns:SOAP-ENC='http://schemas.xmlsoap.org/soap/encoding/'
    SOAP-ENV:encodingStyle='http://schemas.xmlsoap.org/soap/encoding/'>
    <SOAP-ENV:Body>
        <ns1:LMEEvenFecResponse>
            <LMEEvenFecReturn xsi:type='ns1:LMEEvenFecResponse'>
                <Estado xsi:type='xsd:integer'>0</Estado>
                <GloEstado xsi:type='xsd:string'>Sin Error</GloEstado>
                <ListaLicencias SOAP-ENC:arrayType='ns1:LicenciaType[139]' xsi:type='ns1:ListaLicenciasType'>
                    <item xsi:type='ns1:LicenciaType'>
                        <NumLicencia xsi:type='xsd:integer'>2780337</NumLicencia>
                        <DigLicencia xsi:type='xsd:string'>7</DigLicencia>
                        <estado xsi:type='xsd:integer'>1</estado>
                        <fecha xsi:type='xsd:dateTime'>2023-01-04T15:47:17</fecha>
                    </item>
                    <item xsi:type='ns1:LicenciaType'>
                        <NumLicencia xsi:type='xsd:integer'>2780338</NumLicencia>
                        <DigLicencia xsi:type='xsd:string'>5</DigLicencia>
                        <estado xsi:type='xsd:integer'>1</estado>
                        <fecha xsi:type='xsd:dateTime'>2023-01-04T15:47:18</fecha>
                    </item>
                </ListaLicencias>
            </LMEEvenFecReturn>
        </ns1:LMEEvenFecResponse>
    </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

I haven't been able to get this value SOAP-ENV:encodingStyle='http://schemas.xmlsoap.org/soap/encoding/'. Some help would be great.

71 Replies

PoldOP•2y ago

I tried several possible solutions in a testing code like this:

[XmlRoot(ElementName = "Envelope", Namespace = "http://schemas.xmlsoap.org/soap/envelope/")]
public class Envelope
{
    [XmlAttribute(AttributeName = "encodingStyle", Namespace = "http://schemas.xmlsoap.org/soap/envelope/")]
    public string EncodingStyle { get; set; }
    [XmlElement(ElementName = "Body")]
    public Body Body { get; set; }
}
// Omitting the rest of the code, you already get the idea

public static void Main()
{
    var serializerNamespaces = new XmlSerializerNamespaces();
    serializerNamespaces.Add("SOAP-ENV", "http://schemas.xmlsoap.org/soap/envelope/");
    serializerNamespaces.Add("ns1", "urn:WsLMEInet");
    serializerNamespaces.Add("xsd", "http://www.w3.org/2001/XMLSchema");
    serializerNamespaces.Add("xsi", "http://www.w3.org/2001/XMLSchema-instance");

    // Deserialize
    var xmlSerializer = new XmlSerializer(typeof(Envelope));
    using var xmlStream = new FileStream("example.xml", FileMode.Open);
    var myEnvelope = (Envelope)xmlSerializer.Deserialize(xmlStream);

    // Serialize
    var writer = new StreamWriter(Console.OpenStandardOutput());
    writer.AutoFlush = true;
    Console.SetOut(writer);

    xmlSerializer.Serialize(writer, myEnvelope, serializerNamespaces);
    writer.Close();
}

[XmlRoot(ElementName = "Envelope", Namespace = "http://schemas.xmlsoap.org/soap/envelope/")]
public class Envelope
{
    [XmlAttribute(AttributeName = "encodingStyle", Namespace = "http://schemas.xmlsoap.org/soap/envelope/")]
    public string EncodingStyle { get; set; }
    [XmlElement(ElementName = "Body")]
    public Body Body { get; set; }
}
// Omitting the rest of the code, you already get the idea

public static void Main()
{
    var serializerNamespaces = new XmlSerializerNamespaces();
    serializerNamespaces.Add("SOAP-ENV", "http://schemas.xmlsoap.org/soap/envelope/");
    serializerNamespaces.Add("ns1", "urn:WsLMEInet");
    serializerNamespaces.Add("xsd", "http://www.w3.org/2001/XMLSchema");
    serializerNamespaces.Add("xsi", "http://www.w3.org/2001/XMLSchema-instance");

    // Deserialize
    var xmlSerializer = new XmlSerializer(typeof(Envelope));
    using var xmlStream = new FileStream("example.xml", FileMode.Open);
    var myEnvelope = (Envelope)xmlSerializer.Deserialize(xmlStream);

    // Serialize
    var writer = new StreamWriter(Console.OpenStandardOutput());
    writer.AutoFlush = true;
    Console.SetOut(writer);

    xmlSerializer.Serialize(writer, myEnvelope, serializerNamespaces);
    writer.Close();
}

JakenVeina•2y ago

all looks okay to me is Body deserializing? better question: is EncodingStyle deserializing?

PoldOP•2y ago

its not its always null I haven't been able to get that SOAP-ENV:encodingStyle value at all I have a break point after deserializing, so I always check, no result 😦

JakenVeina•2y ago

how do you k ow it's null? er scratch that so, yeah, is Body null?

PoldOP•2y ago

nope, body is not null

JakenVeina•2y ago

are you quite certain you're deserializing the right file?

PoldOP•2y ago

yes its the only xml file on the project (console project I made, with the only purpose of solving this problem)

JakenVeina•2y ago

well, now I have to ask if it's part of the project which copy of the file are you deserializing?

PoldOP•2y ago

JakenVeina•2y ago

that screenshot is incomprehensible

PoldOP•2y ago

what I meant sending the screenshot, its that its quite a simple project, Program.cs with the code, and example.xml

JakenVeina•2y ago

yes which copy of example.xml?

PoldOP•2y ago

what do mean which copy? there is only 1 version of the xml

JakenVeina•2y ago

if you have it as part of your project, it's likely getting copied and deployed to the bin folder especially if you're referencing it via a relative path

PoldOP•2y ago

oh I get it, 1 sec

JakenVeina•2y ago

it's likely opening the version in the bin folder, which may not be the one you've been editing

PoldOP•2y ago

there is no copy of example.xml on bin nor obj

JakenVeina•2y ago

how are you running the project, then? how does that relative path of "example.xml" resolve?

PoldOP•2y ago

let me delete these folders and try again, I recycled this project and have some leftovers 1 min

JakenVeina•2y ago

by default, that means it's going to look for the file in the same folder as the project exe/dll which is the bin folder unless you're changing the working directory, or launching the program from a different directory

PoldOP•2y ago

I'm just using the default debugging tool on vscode

PoldOP•2y ago

clean project

JakenVeina•2y ago

well, I know nothing about VSCode tooling

PoldOP•2y ago

PoldOP•2y ago

it doesnt generate a xml copy

JakenVeina•2y ago

also, obligatory recommendation to notbuse VSCode, if you don't have to

PoldOP•2y ago

uses the same one I have in the root folder

JakenVeina•2y ago

alright, well that's really the only idea I have your code looks proper obviously, it's not, and it's almost certainly that you're not defining namespaces properly, somehow

PoldOP•2y ago

yeah, it "looks" proper.. but I just can't read that damn namespaced attribute

JakenVeina•2y ago

but I don't see it maybe because the namespace alias is at the same level as the attribute that's trying to use it? does it work if you drop the namespace on the attribute? or if you swap the namespace definition in your model to just SOAP-ENV? maybe the engine just doesn't donnamespace translations for you? I would be rather appalled if it didn't, but maybe not surprised

PoldOP•2y ago

Same result, null

JakenVeina•2y ago

dropped from both the file and the model, right?

PoldOP•2y ago

only model same, null

JakenVeina•2y ago

yeah, that's definitely not gonna work, the namespaces now don't match. Drop it from both

PoldOP•2y ago

do you mean delete it from example.xml ?

JakenVeina•2y ago

yes

PoldOP•2y ago

that wouldn't make much sense, I can't edit that file, since it comes from an API 😦 ill try tho, second

JakenVeina•2y ago

I'm aware, we're just experimenting additional idea: deserialize the whole thing to an XmlDocument or whatever the DOM library is, and you can inspect EXACTLY how the engine is interpreting everything

PoldOP•2y ago

it actually didnt work 😦

PoldOP•2y ago

JakenVeina•2y ago

PoldOP•2y ago

PoldOP•2y ago

now, THAT makes no sense

JakenVeina•2y ago

little bit

PoldOP•2y ago

I assumed it would work.

JakenVeina•2y ago

now I'm intrigued and wanna get my own hands on this unfortunately, I'm not at home

PoldOP•2y ago

yeah, thanks for the help. Much appreciated... this new finding can give me some room to test some new things.... there are way more examples of xml deserialization when the attribute has no namespace, maybe I can make it work, then I go back to try it with namespace My bad, I didn't correctly change the example.xml file. since the code was running. It worked now (without namespace)

PoldOP•2y ago

Adding the namespace back, it goes back to null

JakenVeina•2y ago

well, that's something

Mayor McCheese•2y ago

Did you try pasting xml as classes?

PoldOP•2y ago

Im not familiar with the concept, what do you mean?

Mayor McCheese•2y ago

https://learn.microsoft.com/en-us/visualstudio/ide/reference/paste-json-xml Also where are you getting the soap from? https://learn.microsoft.com/en-us/dotnet/core/additional-tools/dotnet-svcutil-guide if it's a trusted web service

PoldOP•2y ago

It seems I needed to specify Form = System.Xml.Schema.XmlSchemaForm.Qualified and now it is not null. Thanks a lot, that tool helped me find that problem. Its not perfect tho, now it throws another problem. Gotta check that out and ill post here again (maybe later/tomorrow)

JakenVeina•2y ago

so, you need an extra annotation to tell the deserializer to interpret namespaces in attribute names?

Mayor McCheese•2y ago

Xml serialization can get really special really fast Usually I just paste xml as classes and that gets me most | all of the way there

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

PoldOP•2y ago

I was kinda busy and couldn't come back to ask my new problem. The thing is, I don't really knwo how to deserialize this part:

PoldOP•2y ago

Paste XML as Classes doesn't work on this part, and when deserializing LMEEvenFecReturn it throws an error

PoldOP•2y ago

Mayor McCheese•2y ago

Where are you getting the soap from?

PoldOP•2y ago

It's a private company, they serve this api service for all their clients, the thing is, it's access restricted tho, I have that xml example, but can't really test it on realtime I guess you wanted me to use the utility you posted above

Mayor McCheese•2y ago

Yah I'm not in a great spot right now, but I think you posted the soap right?

JakenVeina•2y ago

that seems highly sus cyclical references?

public class LMEEvenFecResponse
{
    public LMEEvenFecResponse LMEEvenFecReturn { get; set; }
}

public class LMEEvenFecResponse
{
    public LMEEvenFecResponse LMEEvenFecReturn { get; set; }
}

actually more like actually, I just don't know off-hand haven't done XML serialization in this detail in a long time dunno why the class generator tool is throwing an error, might be worth submitting a bug report ultimately, I believe what's happening is that you have a property or something of type LMEEvenFecReturn, which is only a base/abstract class. LMEEvenFecResponse is annotated as the specific subclass that was serialized, so that annotation there is telling the deserializer what class to new up an instance of and there's some kinda bug or limitation in the code-generator tool causing the issue, while the XML itself is fine I mean, irrelevant of what the tag is supposed to be there for the error is nonsense the type ns1:LMEEvenFecResponse is clearly defined, in the exact same screenshot

Mayor McCheese•2y ago

Iirc the soap stuff does some horrifying stuff

JakenVeina•2y ago

for sure it SEEMS to me what's happening here is that responses can be nested which is perfectly fine, OOP-wise like how exceptions can have an inner exception

Mayor McCheese•2y ago

Only only looked at the xml as a giant wall of text tbh

PoldOP•2y ago

Thanks for the help, haven't really got it to work. I was trying to work around it by defining LMEEvenFecResponse as an array of 1 element, where LMEEvenFecReturn is a derived class. Something like it appears in the documentation: https://learn.microsoft.com/en-us/dotnet/standard/serialization/controlling-xml-serialization-using-attributes#serializing-derived-classes I hope I get it to work like that... still no success tho, that type having a namespace kinda bothers me, however didn't have much time today to try.

Controlling XML Serialization Using Attributes

Attributes can be used to control the XML serialization of an object or to create an alternate XML stream from the same set of classes.

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ Help deserializing XML file