How to Fix ' was not expected' Error When Deserializing Twitter XML?
was not expected" Error When Deserializing Twitter XML?
" />
Resolving the Twitter XML Deserialization Error: “<user xmlns="">
was not expected.”
When deserializing Twitter's XML data, you might encounter the error message “<user xmlns="">
was not expected.” This typically arises because Twitter's XML response uses a root element <user>
without a namespace declaration, while your code expects a different root element or namespace.
The Problem:
The mismatch occurs when your deserialization code anticipates a root element with a specific name and/or namespace, but the actual XML structure differs. This leads to the deserializer rejecting the unexpected <user xmlns="">
element.
Solutions:
Here are two methods to correct this deserialization issue:
1. Annotate Your Class with XmlRoot
:
Modify your User
class definition to include the XmlRoot
attribute. This attribute explicitly tells the serializer the expected root element name and namespace:
[XmlRoot(ElementName = "user", Namespace = "")] public partial class User { // Class properties... }
2. Utilize the XmlSerializer
Constructor with XmlRootAttribute
:
Alternatively, you can create an XmlSerializer
instance, providing an XmlRootAttribute
to define the root element during deserialization:
XmlRootAttribute xRoot = new XmlRootAttribute(); xRoot.ElementName = "user"; XmlSerializer xs = new XmlSerializer(typeof(User), xRoot);
By implementing either of these solutions, you align your deserialization expectations with the actual structure of Twitter's XML response, thereby eliminating the "<user xmlns="">
was not expected" error. The deserializer will now correctly parse the XML data into your User
object.
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