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hde -> XmlSerialization of derived classes with same name (2 October 2007)
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Hi, I'm running into an error when using the XmlSerializer ..... : Types 'NamespaceA.NameBaseClass' and 'NamespaceB.NameBaseClass' both use the XML type name, 'NameBaseClass', from namespace 'XmlNamespaceB'. Use XML attributes to specify a unique XML name and/or namespace for the type.
The cause of the error is obvious : 2 classes with the same name (one inherits from the other one, but in different .Net namespaces) are repsonsible for the error. A simplified code example will explain this furthermore ... (see below) I can think of 2 solutions to handle this issue, but unfortunately they don't really fit in the "real-life" context. Solution 1 :Define an appropriate Xml-Namespace by means of the XmlTypeAttribute for each class. [XmlType(Namespace = "NamespaceA")]But : the NamespaceA belongs to a third party component. So, no way to intervene in this assembly. Solution 2 :Rename the derived class (in namespaceB) to an unique name within namespaceA and namespaceB.But : the classes in the namespaceB are intensively used within our company. About 90% of our classes inherit from this class (= the one in namespaceB).So, refactoring this class would have a huge impact on all our applications.... Solution 3 :Any new idea would be great ..... :0) using Systemusing System.Collections.Generic;using System.Text;using System.Xml.Serialization;using System.IO;using System.Xml; namespace NamespaceA //This is the thirdparty assembly{
//[XmlType(Namespace="XmlNamespaceA")]
public class NameBaseClass
{
private string _firstName;
public string FirstName
{
get { return _firstName; }
set { _firstName = value; }
}
}
}
namespace NamespaceB //This is the company wide used assembly
{
[XmlType(Namespace = "XmlNamespaceB")]
public class NameBaseClass : NamespaceA.NameBaseClass
{
private string _lastName;
public string LastName
{
get { return _lastName; }
set { _lastName = value; }
}
}
}
namespace MyTest
{
public class MyNameClass : NamespaceB.NameBaseClass //This is my concrete class used in my development project.
{
}
public class TestSameNameClass //The test
{
public void TestSerialization()
{
MyNameClass name = new MyNameClass();
name.FirstName = "yves";
name.LastName = "leterme";
//Here we have the error :
//
// Types 'NamespaceA.NameBaseClass' and 'NamespaceB.NameBaseClass' both use the XML type name, 'NameBaseClass', from namespace 'XmlNamespaceB'. Use XML attributes to specify a unique XML name and/or namespace for the type.
//
XmlSerializer serializer = new XmlSerializer(typeof(MyNameClass));
StreamWriter writer = new StreamWriter("C:\\Temp\\TestName.xml");
serializer.Serialize(writer, name);
writer.Close();
}
}
}
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