XmlDataDocument.CloneNode(Boolean) Méthode

Définition

Espace de noms:

System.Xml

Assembly:

System.Data.Common.dll

Assembly:

System.Data.dll

Crée un doublon du nœud en cours.

public:
 override System::Xml::XmlNode ^ CloneNode(bool deep);

public override System.Xml.XmlNode CloneNode (bool deep);

override this.CloneNode : bool -> System.Xml.XmlNode

Public Overrides Function CloneNode (deep As Boolean) As XmlNode

Paramètres

deep

Boolean

true pour cloner récursivement la sous-arborescence sous le nœud spécifié ; false pour cloner seulement le nœud lui-même.

Retours

XmlNode

Nœud cloné.

Exemples

L’exemple suivant charge une DataSet dans un XmlDataDocument fichier, puis crée un clone peu profond du XmlDataDocumentfichier .

L’exemple utilise la base de données Northwind SQL Server 2000.

#using <System.Xml.dll>
#using <System.Transactions.dll>
#using <System.EnterpriseServices.dll>
#using <System.dll>
#using <System.Data.dll>

using namespace System;
using namespace System::Data;
using namespace System::Xml;
using namespace System::Data::SqlClient;
int main()
{
   DataSet^ dsNorthwind = gcnew DataSet;
   
   //Create the connection string.           
   String^ sConnect;
   sConnect = "Data Source=localhost;Integrated Security=SSPI;Initial Catalog=Northwind";
   
   //Create a connection object to connect to the northwind db.
   SqlConnection^ nwconnect = gcnew SqlConnection( sConnect );
   
   //Create a command string to select all the customers in the WA region.
   String^ sCommand = "Select * from Customers where Region='WA'";
   
   //Create an adapter to load the DataSet.
   SqlDataAdapter^ myDataAdapter = gcnew SqlDataAdapter( sCommand,nwconnect );
   
   //Fill the DataSet with the selected records.
   myDataAdapter->Fill( dsNorthwind, "Customers" );
   
   //Load the document with the DataSet.
   XmlDataDocument^ doc = gcnew XmlDataDocument( dsNorthwind );
   
   //Create a shallow clone of the XmlDataDocument. Note that although
   //none of the child nodes were copied over, the cloned node does
   //have the schema information.
   XmlDataDocument^ clone = dynamic_cast<XmlDataDocument^>(doc->CloneNode( false ));
   Console::WriteLine( "Child count: {0}", clone->ChildNodes->Count );
   Console::WriteLine( clone->DataSet->GetXmlSchema() );
}

using System;
using System.Data;
using System.Xml;
using System.Data.SqlClient;

public class Sample
{
  public static void Main()
  {
     DataSet dsNorthwind = new DataSet();

     //Create the connection string.
     String sConnect;
     sConnect="Data Source=localhost;Integrated Security=SSPI;Initial Catalog=Northwind";

     //Create a connection object to connect to the northwind db.
     SqlConnection nwconnect = new SqlConnection(sConnect);

     //Create a command string to select all the customers in the WA region.
     String sCommand = "Select * from Customers where Region='WA'";

     //Create an adapter to load the DataSet.
     SqlDataAdapter myDataAdapter = new SqlDataAdapter(sCommand, nwconnect);

     //Fill the DataSet with the selected records.
     myDataAdapter.Fill(dsNorthwind,"Customers");

     //Load the document with the DataSet.
     XmlDataDocument doc = new XmlDataDocument(dsNorthwind);

     //Create a shallow clone of the XmlDataDocument. Note that although
     //none of the child nodes were copied over, the cloned node does
     //have the schema information.
     XmlDataDocument clone = (XmlDataDocument) doc.CloneNode(false);
     Console.WriteLine("Child count: {0}", clone.ChildNodes.Count);
     Console.WriteLine(clone.DataSet.GetXmlSchema());
  }
}

Imports System.Xml
Imports System.Data
Imports System.Data.SqlClient

public class Sample
 
  public shared sub Main()
   
    Dim dsNorthwind as DataSet = new DataSet()
 
    'Create the connection string.
    Dim sConnect as String           
    sConnect="Data Source=localhost;Integrated Security=SSPI;Initial Catalog=Northwind"     
          
    'Create a connection object to connect to the northwind db.
    Dim nwconnect as SqlConnection
    nwconnect = new SqlConnection(sConnect)
 
    'Create a command string to select all the customers in the WA region.
    Dim sCommand as String = "Select * from Customers where Region='WA'"
 
    'Create an Adapter to load the DataSet.
    Dim myDataAdapter as SqlDataAdapter
    myDataAdapter = new SqlDataAdapter(sCommand, nwconnect)
 
    'Fill the DataSet with the selected records.
    myDataAdapter.Fill(dsNorthwind, "Customers")
 
    'Load the document with the DataSet.
    Dim doc as XmlDataDocument = new XmlDataDocument(dsNorthwind)  
 
    'Create a shallow clone of the XmlDataDocument. Note that although
    'none of the child nodes were copied over, the cloned node does
    'have the schema information.
    Dim clone as XmlDataDocument
    clone = CType (doc.CloneNode(false), XmlDataDocument) 
    Console.WriteLine("Child count: {0}", clone.ChildNodes.Count)
    Console.WriteLine(clone.DataSet.GetXmlSchema())
 
  end sub
end class

Remarques

Le clonage du XmlDataDocument schéma clone également le DataSet schéma.

Si deep elle est définie sur false, le cloné DataSet n’a pas de données ; autrement dit, aucune ligne.

Si deep elle est définie truesur , le cloné DataSet est défini avec le schéma, puis renseigné avec les données.

Consultez CloneNode la XmlNode classe pour voir une table décrivant comment cette méthode se comporte avec chacun des différents types de nœuds.