Export (0) Print
Expand All

XmlNodeEventArgs Class

Provides data for the UnknownNode event.

Namespace:  System.Xml.Serialization
Assembly:  System.Xml (in System.Xml.dll)

public class XmlNodeEventArgs : EventArgs

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.

using System;
using System.IO;
using System.Xml;
using System.Xml.Serialization;

public class Group{
   // Only the GroupName field will be known. 
   public string GroupName;
}

public class Test{
   static void Main(){
      Test t = new Test();
      t.DeserializeObject("UnknownNodes.xml");
   }

   private void DeserializeObject(string filename){
      XmlSerializer mySerializer = new XmlSerializer(typeof(Group));
      FileStream fs = new FileStream(filename, FileMode.Open);
      mySerializer.UnknownNode += new 
      XmlNodeEventHandler(serializer_UnknownNode);
      Group myGroup = (Group) mySerializer.Deserialize(fs);
      fs.Close();
   }
   private void serializer_UnknownNode
   (object sender, XmlNodeEventArgs e){
      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);

      XmlNodeType myNodeType = e.NodeType;
      Console.WriteLine("NodeType: {0}", myNodeType);

      Group myGroup = (Group) e.ObjectBeingDeserialized;
      Console.WriteLine("GroupName: {0}", myGroup.GroupName);
      Console.WriteLine();
   }
}
/* 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>
*/   

System.Object
  System.EventArgs
    System.Xml.Serialization.XmlNodeEventArgs

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

Community Additions

ADD
Show:
© 2014 Microsoft