XmlNodeEventArgs Class
Provides data for the UnknownNode event.
Assembly: System.Xml (in System.Xml.dll)
For more information about handling events, see Consuming Events.
The UnknownNode event can occur only when you call the Deserialize method.
The following example uses the UnknownNode event of the XmlSerializer to print various properties of an unknown XML node that is encountered when calling the XmlSerializer class's Deserialize method.
Imports System Imports System.IO Imports System.Xml Imports System.Xml.Serialization Public Class Group ' Only the GroupName field will be known. Public GroupName As String End Class Public Class Test Shared Sub Main() Dim t As Test = New Test() t.DeserializeObject("UnknownNodes.xml") End Sub Private Sub DeserializeObject(filename As String ) Dim mySerializer As XmlSerializer = New XmlSerializer(GetType(Group)) Dim fs As FileStream = New FileStream(filename, FileMode.Open) AddHandler mySerializer.UnknownNode, _ AddressOf serializer_UnknownNode Dim myGroup As Group = _ CType(mySerializer.Deserialize(fs), Group) fs.Close() End Sub Private Sub serializer_UnknownNode _ (sender As object , e As XmlNodeEventArgs ) Console.WriteLine _ ("UnknownNode Name: {0}", e.Name) Console.WriteLine _ ("UnknownNode LocalName: {0}" ,e.LocalName) Console.WriteLine _ ("UnknownNode Namespace URI: {0}", e.NamespaceURI) Console.WriteLine _ ("UnknownNode Text: {0}", e.Text) Dim myNodeType As XmlNodeType = e.NodeType Console.WriteLine("NodeType: {0}", myNodeType) Dim myGroup As Group = CType(e.ObjectBeingDeserialized, Group) Console.WriteLine("GroupName: {0}", myGroup.GroupName) Console.WriteLine() End Sub End Class ' Paste this XML into a file named UnknownNodes: '<?xml version="1.0" encoding="utf-8"?> '<Group xmlns:xsi="http:'www.w3.org/2001/XMLSchema-instance" 'xmlns:xsd="http:'www.w3.org/2001/XMLSchema" xmlns:coho = "http:'www.cohowinery.com" 'xmlns:cp="http:'www.cpandl.com"> ' <coho:GroupName>MyGroup</coho:GroupName> ' <cp:GroupSize>Large</cp:GroupSize> ' <cp:GroupNumber>444</cp:GroupNumber> ' <coho:GroupBase>West</coho:GroupBase> ' <coho:ThingInfo> ' <Number>1</Number> ' <Name>Thing1</Name> ' <Elmo> ' <Glue>element</Glue> ' </Elmo> ' </coho:ThingInfo> '/Group>
#using <mscorlib.dll>
#using <System.Xml.dll>
using namespace System;
using namespace System::IO;
using namespace System::Xml;
using namespace System::Xml::Serialization;
public __gc class Group{
// Only the GroupName field will be known.
public:
String* GroupName;
};
public __gc class Test{
public:
static void main(){
Test* t = new Test();
t->DeserializeObject(S"UnknownNodes.xml");
}
private:
void DeserializeObject(String* filename){
XmlSerializer* mySerializer = new XmlSerializer(__typeof(Group));
FileStream* fs = new FileStream(filename, FileMode::Open);
mySerializer->UnknownNode += new
XmlNodeEventHandler(this, &Test::serializer_UnknownNode);
Group* myGroup = dynamic_cast<Group*> (mySerializer->Deserialize(fs));
fs->Close();
}
protected:
void serializer_UnknownNode
(Object* /*sender*/, XmlNodeEventArgs* e){
Console::WriteLine(S"UnknownNode Name: {0}",e->Name);
Console::WriteLine(S"UnknownNode LocalName: {0}",e->LocalName);
Console::WriteLine(S"UnknownNode Namespace URI: {0}",e->NamespaceURI);
Console::WriteLine(S"UnknownNode Text: {0}",e->Text);
XmlNodeType myNodeType = e->NodeType;
Console::WriteLine(S"NodeType: {0}", __box(myNodeType));
Group* myGroup = dynamic_cast<Group*> (e->ObjectBeingDeserialized);
Console::WriteLine(S"GroupName: {0}",myGroup->GroupName);
Console::WriteLine();
}
};
int main()
{
Test::main();
}
/* Paste this XML into a file named UnknownNodes:
<?xml version="1.0" encoding="utf-8"?>
<Group xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:coho = "http://www.cohowinery.com"
xmlns:cp="http://www.cpandl.com">
<coho:GroupName>MyGroup</coho:GroupName>
<cp:GroupSize>Large</cp:GroupSize>
<cp:GroupNumber>444</cp:GroupNumber>
<coho:GroupBase>West</coho:GroupBase>
<coho:ThingInfo>
<Number>1</Number>
<Name>Thing1</Name>
<Elmo>
<Glue>element</Glue>
</Elmo>
</coho:ThingInfo>
</Group>
*/
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.