Ejemplo de las propiedades Provider y DefaultDatabase (VJ++)

Se aplica a: Access 2013, Office 2013

En este ejemplo se muestra la propiedad Provider al abrir tres objetos Connection mediante diferentes proveedores. También se utiliza la propiedad DefaultDatabase para establecer la base de datos predeterminada del Proveedor Microsoft ODBC.

 
// BeginProviderJ 
import java.io.*; 
import com.ms.wfc.data.*; 
 
public class ProviderX 
{ 
 // The main entry point of the application. 
 public static void main (String[] args) 
 { 
 ProviderX(); 
 System.exit(0); 
 } 
 // ProviderX Function 
 static void ProviderX() 
 { 
 // Define ADO Objects. 
 Connection cnn1 = null; 
 Connection cnn2 = null; 
 Connection cnn3 = null; 
 
 // Declarations. 
 BufferedReader in = 
 new BufferedReader(new InputStreamReader(System.in)); 
 try 
 { 
 // Open a connection using the Microsoft ODBC Provider. 
 cnn1 = new Connection(); 
 cnn1.setConnectionString("driver={SQL Server};"+ 
 "server='MySqlServer';User ID='MyUserID';Password='MyPassword';"); 
 cnn1.open(); 
 cnn1.setDefaultDatabase("Pubs"); 
 
 // Display the provider. 
 System.out.println("\n\n\tCnn1 provider: "+ cnn1.getProvider()); 
 
 // Open connection using the OLE DB Provider for Microsoft Jet. 
 cnn2 = new Connection(); 
 cnn2.setProvider("Microsoft.Jet.OLEDB.4.0"); 
 cnn2.open("C:\\Program Files\\Microsoft Office\\Office\\Samples\\Northwind.mdb","admin",""); 
 
 // Display the provider. 
 System.out.println("\n\n\tCnn2 provider: " + 
 cnn2.getProvider()); 
 
 // Open a connection using the Microsoft SQL Server Provider. 
 cnn3 = new Connection(); 
 cnn3.setProvider("sqloledb"); 
 cnn3.open("Data Source='MySqlServer';Initial Catalog='Pubs';Integrated Security='SSPI';","",""); 
 
 // Display the provider. 
 System.out.println("\n\n\tCnn3 provider: " + 
 cnn3.getProvider()); 
 
 System.out.println("\n\n\tPress <Enter> to continue.."); 
 in.readLine(); 
 } 
 catch(AdoException ae) 
 { 
 // Notify the user of any errors that result from ADO. 
 
 // As passing a Connection, check for null pointer first. 
 if(cnn1 != null) 
 { 
 PrintProviderError(cnn1); 
 } 
 else 
 { 
 System.out.println("Exception: " + ae.getLocalizedMessage()); 
 } 
 } 
 // System read requires needs this catch. 
 catch(java.io.IOException je) 
 { 
 PrintIOError(je); 
 } 
 
 finally 
 { 
 // Cleanup objects before exit. 
 if (cnn1 != null) 
 if (cnn1.getState() == 1) 
 cnn1.close(); 
 if (cnn2 != null) 
 if (cnn2.getState() == 1) 
 cnn2.close(); 
 if (cnn3 != null) 
 if (cnn3.getState() == 1) 
 cnn3.close(); 
 } 
 } 
 // PrintProviderError Function 
 
 static void PrintProviderError( Connection Cnn1 ) 
 { 
 // Print Provider errors from Connection object. 
 // ErrItem is an item object in the Connections Errors collection. 
 com.ms.wfc.data.Error ErrItem = null; 
 long nCount = 0; 
 int i = 0; 
 
 nCount = Cnn1.getErrors().getCount(); 
 
 // If there are any errors in the collection, print them. 
 if( nCount > 0); 
 { 
 // Collection ranges from 0 to nCount - 1 
 for (i = 0; i< nCount; i++) 
 { 
 ErrItem = Cnn1.getErrors().getItem(i); 
 System.out.println("\t Error number: " + ErrItem.getNumber() 
 + "\t" + ErrItem.getDescription() ); 
 } 
 } 
 
 } 
 
 // PrintIOError Function 
 
 static void PrintIOError( java.io.IOException je) 
 { 
 System.out.println("Error \n"); 
 System.out.println("\tSource = " + je.getClass() + "\n"); 
 System.out.println("\tDescription = " + je.getMessage() + "\n"); 
 } 
} 
// EndProviderJ