XmlDataDocument.CloneNode(Boolean) Methode

Definition

Namespace:

System.Xml

Assembly:

System.Data.Common.dll

Assembly:

System.Data.dll

Erstellt ein Duplikat des aktuellen Knotens.

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

Parameter

deep

Boolean

true, wenn die Teilstruktur unter dem angegebenen Knoten rekursiv geklont werden soll, false, wenn nur der Knoten selbst geklont werden soll.

Gibt zurück

XmlNode

Der geklonte Knoten.

Beispiele

Im folgenden Beispiel wird eine in eine XmlDataDocument Datei geladen DataSet und dann ein flacher Klon des .XmlDataDocument

Im Beispiel wird die SQL Server 2000 Northwind-Datenbank verwendet.

#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

Hinweise

Das Klonen des XmlDataDocument DataSet Schemas wird auch geklont.

falseWenn deep festgelegt ist, hat die geklonte DataSet Datei keine Daten; das heißt, keine Zeilen.

Wenn deep festgelegt ist, wird die geklonte DataSet Datei mit dem Schema festgelegt trueund dann mit den Daten gefüllt.

Sehen Sie sich in der Klasse eine Tabelle an, in der XmlNode beschrieben CloneNode wird, wie sich diese Methode mit jedem der verschiedenen Knotentypen verhält.