Xml namespace issue using httpclient while deserializing

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I have a api which returns the result:

XML

<envelope:envelope xmlns:envelope="http://xxx.com/data-hub/envelope">
<envelope:header>
<additionalInfo>
<Rebates/>
<Expenses>930879969</Expenses>
<Months>20</Months>
</additionalInfo>
</envelope:header>
</envelope>

I am getting issue :

Error in line 1 position 76. Expecting element 'Envelope' from namespace 'http://schemas.datacontract.org/2004/07/'
.. Encountered 'Element' with name 'envelope', namespace 'http://xxx.com/data-hub/envelope'.

What I have tried:

C#

using (HttpClient client = new HttpClient())
{
    var responseTask = await client.GetAsync(uri);
    responseTask.Wait();

    var result = responseTask.Result;
    if (result.IsSuccessStatusCode)
    {
        var readTask = result.Content.ReadAsAsync<t>();
        readTask.Wait();
        response = readTask.Result;
    }

I am getting error at ReadAsynch<t>

The class T i am sending is:

C#

[XmlRoot(ElementName = "envelope", Namespace = "http://xxx.com/data-hub/envelope")]
public class Envelope
{
    [XmlElement(ElementName = "header", Namespace = "http://xxx.com/data-hub/envelope")]
    public Header Header { get; set; }

    [XmlAttribute(AttributeName = "envelope", Namespace = "http://www.w3.org/2000/xmlns/")]
    public string _envelope { get; set; }
}

C#

public class Header
{
    [XmlElement(ElementName = "additionalInfo")]
    public AdditionalInfo AdditionalInfo { get; set; }
}

C#

public class AdditionalInfo
{
    [XmlElement(ElementName = "Rebates")]
    public string Rebates { get; set; }
    [XmlElement(ElementName = "Expenses")]
    public string Expenses { get; set; }
    [XmlElement(ElementName = "Months")]
    public string Months{ get; set; }
}

Posted 1-Sep-17 12:42pm

AlwzLearning

Updated 1-Sep-17 14:14pm

PIEBALDconsult

v3

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Comments

PIEBALDconsult 1-Sep-17 19:52pm

Looks inconsistent.
Shouldn't the final line of the XML be </envelope:envelope> ?
And in your code, why [XmlAttribute(AttributeName = "envelope", Namespace = "http://www.w3.org/2000/xmlns/")] ?
I have found XML namespaces difficult to work with, and particularly if you mess with the default/empty namespace, so I recommend against it.

Graeme_Grant 1-Sep-17 21:46pm

"I have found XML namespaces difficult to work with" ... really? Then you would not like XAML programming?

PIEBALDconsult 1-Sep-17 21:49pm

Which I have no interest in anyway.

Graeme_Grant 1-Sep-17 21:53pm

WPF, UWP, Xamarin Forms XAML is very flexible & powerful for UI design... and especially for data binding when compared with Winform apps.

PIEBALDconsult 1-Sep-17 22:04pm

I don't do UI design (I've been asked not to) and data binding is for sissies.

Graeme_Grant 1-Sep-17 22:06pm

LMAO!

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Graeme_Grant · Answer 1 · 2017-09-01T14:14:00

As PIEBALDconsult mentions, there is at least one error in your XML with the closing tag:

XML

<envelope:envelope xmlns:envelope="http://xxx.com/data-hub/envelope">
	<envelope:header>
		<additionalInfo>
			<Rebates/>
			<Expenses>930879969</Expenses>
			<Months>20</Months>
		</additionalInfo>
	</envelope:header>
</envelope:envelope>

Also, you are using mixed namespaces. There are two solutions:

1. add an additional namespace definition to the opening element:

XML

<envelope:envelope xmlns:envelope="http://xxx.com/data-hub/envelope" 
                   xmlns="http://xxx.com/data-hub/envelope">
	<envelope:header>
		<additionalInfo>
			<Rebates/>
			<Expenses>930879969</Expenses>
			<Months>20</Months>
		</additionalInfo>
	</envelope:header>
</envelope:envelope>

2. All elements have the same namespace:

XML

<envelope:envelope xmlns:envelope="http://xxx.com/data-hub/envelope">
	<envelope:header>
		<envelope:additionalInfo>
			<envelope:Rebates/>
			<envelope:Expenses>930879969</envelope:Expenses>
			<envelope:Months>20</envelope:Months>
		</envelope:additionalInfo>
	</envelope:header>
</envelope:envelope>

Lastly, the Envelope class should be:

C#

[XmlRoot(ElementName = "envelope", Namespace = "http://xxx.com/data-hub/envelope")]
public class Envelope
{
    [XmlElement(ElementName = "header")]
    public Header Header { get; set; }
}

And here are the other classes, used for testing, for consistancy:

C#

public class Header
{
	[XmlElement(ElementName = "additionalInfo")]
	public AdditionalInfo AdditionalInfo { get; set; }
}

public class AdditionalInfo
{
	[XmlElement(ElementName = "Rebates")]
	public string Rebates { get; set; }
	[XmlElement(ElementName = "Expenses")]
	public string Expenses { get; set; }
	[XmlElement(ElementName = "Months")]
	public string Months { get; set; }
}