XmlAnyElementAttributes.Add(XmlAnyElementAttribute) Methode

Definition

Namespace:

System.Xml.Serialization

Assembly:

System.Xml.XmlSerializer.dll

Quelle:

XmlAnyElementAttributes.cs

Fügt der Auflistung XmlAnyElementAttribute hinzu.

public:
 int Add(System::Xml::Serialization::XmlAnyElementAttribute ^ attribute);

public int Add (System.Xml.Serialization.XmlAnyElementAttribute? attribute);

member this.Add : System.Xml.Serialization.XmlAnyElementAttribute -> int

Public Function Add (attribute As XmlAnyElementAttribute) As Integer

Parameter

attribute

XmlAnyElementAttribute

Das hinzuzufügende XmlAnyElementAttribute.

Gibt zurück

Int32

Der Index des neu hinzugefügten XmlAnyElementAttribute.

Beispiele

Im folgenden Beispiel wird eine neue XmlAnyElementAttribute erstellt und der Auflistung von Objekten hinzugefügt, auf die über die XmlAnyElements -Eigenschaft zugegriffen wird. Wird XmlAttributes dann zu einer XmlAttributeOverrideshinzugefügt, die verwendet wird, um eine XmlSerializerzu erstellen. Wird XmlSerializer verwendet, um ein Objekt zu serialisieren oder zu deserialisieren. Um die Auswirkungen der Verwendung der XmlAnyElementAttributes -Eigenschaft zu sehen, erstellen Sie ein XML-Dokument mit dem Namen UnknownElements.xml, indem Sie die SerializeObject -Methode in der Main -Methode ausführen. Bearbeiten Sie das resultierende Dokument, um andere (unbekannte) Elemente einzuschließen. Kommentieren Sie den SerializeObject Aufruf in der Main -Methode aus, und heben Sie die Auskommentierung des Aufrufs der DeserializeObject -Methode auf, die den Namen und Den Wert eines unbekannten XML-Elements ausgibt.

#using <System.dll>
#using <System.xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml::Serialization;
using namespace System::Xml;
public ref class Group
{
public:
   String^ GroupName;

   [XmlAnyElement]
   array<Object^>^Things;
};

void SerializeObject( String^ filename );
void DeserializeObject( String^ filename );
XmlSerializer^ CreateOverrideSerializer();
int main()
{
   // 1 Run this and create the XML document.
   // 2 Add new elements to the XML document.
   // 3 Comment out the next line, and uncomment
   // the DeserializeObject line to deserialize the
   // XML document and see unknown elements.
   SerializeObject( "UnknownElements.xml" );

   // DeserializeObject(S"UnknownElements.xml");
}

void SerializeObject( String^ filename )
{
   XmlSerializer^ ser = gcnew XmlSerializer( Group::typeid );
   TextWriter^ writer = gcnew StreamWriter( filename );
   Group^ g = gcnew Group;
   g->GroupName = "MyGroup";
   ser->Serialize( writer, g );
   writer->Close();
}

void DeserializeObject( String^ filename )
{
   XmlSerializer^ ser = CreateOverrideSerializer();

   // A FileStream is needed to read the XML document.
   FileStream^ fs = gcnew FileStream( filename,FileMode::Open );
   Group^ g = safe_cast<Group^>(ser->Deserialize( fs ));
   fs->Close();
   Console::WriteLine( g->GroupName );
   Console::WriteLine( g->Things->Length );
   for ( int i = 0; i < g->Things->Length; ++i )
   {
      XmlElement^ xelement = safe_cast<XmlElement^>(g->Things[ i ]);
      Console::WriteLine( "{0}: {1}", xelement->Name, xelement->InnerXml );
   }
}

XmlSerializer^ CreateOverrideSerializer()
{
   XmlAnyElementAttribute^ myAnyElement = gcnew XmlAnyElementAttribute;
   XmlAttributeOverrides^ xOverride = gcnew XmlAttributeOverrides;
   XmlAttributes^ xAtts = gcnew XmlAttributes;
   xAtts->XmlAnyElements->Add( myAnyElement );
   xOverride->Add( Group::typeid, "Things", xAtts );
   return gcnew XmlSerializer( Group::typeid,xOverride );
}

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

public class Group{
   public string GroupName;
   [XmlAnyElement]
   public object[]Things;
}

public class Test{
   static void Main(){
      Test t = new Test();
      // 1 Run this and create the XML document.
      // 2 Add new elements to the XML document.
      // 3 Comment out the new line, and uncomment
      // the DeserializeObject line to deserialize the
      // XML document and see unknown elements.
      t.SerializeObject("UnknownElements.xml");
     
      // t.DeserializeObject("UnknownElements.xml");
   }

   private void SerializeObject(string filename){
      XmlSerializer ser = new XmlSerializer(typeof (Group));
      TextWriter writer = new StreamWriter(filename);
      Group g = new Group();
      g.GroupName = "MyGroup";
      ser.Serialize(writer, g);
      writer.Close();
   }

   private void DeserializeObject(string filename){

      XmlSerializer ser = CreateOverrideSerializer();
      // A FileStream is needed to read the XML document.
      FileStream fs = new FileStream(filename, FileMode.Open);
     Group g = (Group)
        ser.Deserialize(fs);
     fs.Close();
     Console.WriteLine(g.GroupName);
     Console.WriteLine(g.Things.Length);
     foreach(XmlElement xelement in g.Things){
     Console.WriteLine(xelement.Name + ": " + xelement.InnerXml);
     }
   }

   private XmlSerializer CreateOverrideSerializer(){
      XmlAnyElementAttribute myAnyElement = 
      new XmlAnyElementAttribute();
      XmlAttributeOverrides xOverride = 
      new XmlAttributeOverrides();
      XmlAttributes xAtts = new XmlAttributes();
      xAtts.XmlAnyElements.Add(myAnyElement);
      xOverride.Add(typeof(Group), "Things", xAtts);
      return new XmlSerializer(typeof(Group) , xOverride);
   }
}

Imports System.IO
Imports System.Xml.Serialization
Imports System.Xml

Public Class Group
   Public GroupName As String 
   <XmlAnyElement> _
   Public Things () As object
End Class

Public Class Test
   Shared Sub Main()
      Dim t As Test = New Test()
      ' 1 Run this and create the XML document.
      ' 2 Add New elements to the XML document.
      ' 3 Comment out the New line, and uncomment
      ' the DeserializeObject line to deserialize the
      ' XML document and see unknown elements.
     t.SerializeObject("UnknownElements.xml")
     
      't.DeserializeObject("UnknownElements.xml")
   End Sub

   Private Sub SerializeObject(filename As String)
      Dim ser As XmlSerializer = New XmlSerializer(GetType (Group))
      Dim writer As TextWriter = New StreamWriter(filename)
      
      Dim g As Group = New Group()
      g.GroupName = "MyGroup"
      ser.Serialize(writer, g)
      writer.Close()
   End Sub

   
   Private Sub DeserializeObject(filename As String)

      Dim ser As XmlSerializer = CreateOverrideSerializer()
      ' A FileStream is needed to read the XML document.
      Dim fs As FileStream = New FileStream(filename, FileMode.Open)
     Dim g As Group = CType( _
        ser.Deserialize(fs), Group)
     fs.Close()
     Console.WriteLine(g.GroupName)
     Console.WriteLine(g.Things.Length)
     Dim xelement As XmlELement
     for each xelement in g.Things
        Console.WriteLine(xelement.Name &": " & xelement.InnerXml)
     next
   End Sub
   

   Private Function CreateOverrideSerializer() As XmlSerializer 
      Dim myAnyElement As XmlAnyElementAttribute = _
      New XmlAnyElementAttribute()
      Dim xOverride As XmlAttributeOverrides = _
      New XmlAttributeOverrides()
      Dim xAtts As XmlAttributes = New XmlAttributes()
      xAtts.XmlAnyElements.Add(myAnyElement)
      xOverride.Add(GetType(Group), "Things", xAtts)
      return New XmlSerializer(GetType(Group) , xOverride)
   End Function
End Class