XmlDataDocument Costruttori

Definizione

Spazio dei nomi:

System.Xml

Assembly:

System.Data.Common.dll

Assembly:

System.Data.dll

Inizializza una nuova istanza della classe XmlDataDocument.

Overload

XmlDataDocument()	Inizializza una nuova istanza della classe XmlDataDocument.
XmlDataDocument(DataSet)	Inizializza una nuova istanza della classe XmlDataDocument con l'oggetto DataSet specificato.

XmlDataDocument()

Inizializza una nuova istanza della classe XmlDataDocument.

public:
 XmlDataDocument();

public XmlDataDocument ();

Public Sub New ()

Commenti

DataSet Viene creato e associato a XmlDataDocument.

XmlDataDocument(DataSet)

Inizializza una nuova istanza della classe XmlDataDocument con l'oggetto DataSet specificato.

public:
 XmlDataDocument(System::Data::DataSet ^ dataset);

public XmlDataDocument (System.Data.DataSet dataset);

new System.Xml.XmlDataDocument : System.Data.DataSet -> System.Xml.XmlDataDocument

Public Sub New (dataset As DataSet)

Parametri

dataset

DataSet

DataSet da caricare in XmlDataDocument.

Esempio

Nell'esempio seguente viene caricata una tabella cliente in un oggetto XmlDataDocument.

Nell'esempio viene usato il database 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 );
   
   //Display the XmlDataDocument.
   doc->Save( Console::Out );
}

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);

     //Display the XmlDataDocument.
     doc.Save(Console.Out);
  }
}

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)  
 
    'Display the XmlDataDocument.
    doc.Save(Console.Out)
 
  end sub
end class

Commenti

L'oggetto XmlDataDocument viene sincronizzato con l'oggetto specificato DataSet. Tutti i dati nell'oggetto DataSet XmlDataDocumentsono immediatamente disponibili tramite . Le modifiche apportate all'oggetto DataSet XmlDataDocumentvengono propagate in . Tutte le modifiche apportate in XmlDataDocument, a condizione che corrispondano allo DataSet schema, vengano propagate nell'oggetto DataSet.

Vedi anche

• SqlConnection
• SqlDataAdapter