User-332046507 posted
The reason the error is occurring is because the serializer tries to call the default constructor of
IExtensibleDataObject, which is internal to the class. It is also a sealed class,
so you cannot override this behavior.
The answer is to create a custom javascript serializer like below. This will ignore the ExtensionData object when it is serialized to the client, effectively removing it from the object. The downfall is that you cannot use the ExtensionData once the object
has been re-serialized from the client.
public class ExtensionDataObjectConverter : JavaScriptConverter
{
public override IEnumerable<Type> SupportedTypes
{
get
{
return new ReadOnlyCollection<Type>(new Type[] {typeof (ExtensionDataObject)});
}
}
public override IDictionary<string, object> Serialize(object obj, JavaScriptSerializer serializer)
{
return null;
}
public override object Deserialize(IDictionary<string, object> dictionary, Type type, JavaScriptSerializer serializer)
{
throw new Exception("The method or operation is not implemented.");
}
}
</Type></Type>
<system.web.extensions><o:p></o:p>
<scripting><o:p></o:p>
<webServices><o:p></o:p>
<jsonSerialization><o:p></o:p>
<converters><o:p></o:p>
<add
name="ExtensionDataObjectConverter"<o:p></o:p>
type="Utilities.Serialization.ExtensionDataObjectConverter"/><o:p></o:p>
</converters><o:p></o:p>
</jsonSerialization><o:p></o:p>
</webServices><o:p></o:p>
</scripting><o:p></o:p>
</system.web.extensions><o:p></o:p>
