XmlDataDocument Construtores

Definição

Namespace:

System.Xml

Assembly:

System.Data.Common.dll

Assembly:

System.Data.dll

Inicializa uma nova instância da classe XmlDataDocument.

Sobrecargas

XmlDataDocument()	Inicializa uma nova instância da classe XmlDataDocument.
XmlDataDocument(DataSet)	Inicializa uma nova instância da classe XmlDataDocument com o DataSet especificado.

XmlDataDocument()

Inicializa uma nova instância da classe XmlDataDocument.

public:
 XmlDataDocument();

public XmlDataDocument ();

Public Sub New ()

Comentários

Um vazio DataSet é criado e associado ao XmlDataDocument.

XmlDataDocument(DataSet)

Inicializa uma nova instância da classe XmlDataDocument com o DataSet especificado.

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)

Parâmetros

dataset

DataSet

O DataSet a ser carregado no XmlDataDocument.

Exemplos

O exemplo a seguir carrega uma tabela do cliente em um XmlDataDocument.

O exemplo usa o banco de dados 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

Comentários

Ele XmlDataDocument é sincronizado com o especificado DataSet. Todos os dados no estão DataSet disponíveis imediatamente por meio do XmlDataDocument. Todas as DataSet alterações são propagadas no XmlDataDocument. Todas as alterações feitas no XmlDataDocument, desde que correspondam ao DataSet esquema, são propagadas no DataSet.

Confira também

• SqlConnection
• SqlDataAdapter