Ejemplo de las propiedades Attributes y Name (VJ++)

Se aplica a: Access 2013, Office 2013

En este ejemplo se muestra el valor de la propiedad Attributes de los objetos Connection, Field y Property. Se utiliza la propiedad Name para mostrar el nombre de cada objeto Field y Property.

 
// BeginAttributesJ 
import com.ms.wfc.data.*; 
import java.io.*; 
 
public class AttributesX 
{ 
 // The main entry point for the application 
 public static void main (String[] args) 
 { 
 AttributesX(); 
 System.exit(0); 
 } 
 
 // AttributeX Function 
 
 static void AttributesX() 
 { 
 // Define ADO Objects. 
 Connection cnConn1 = null; 
 Recordset rstEmployees = null; 
 Fields listOfFields = null; 
 AdoProperties listOfProperties = null; 
 
 //Declarations. 
 BufferedReader in = 
 new BufferedReader (new InputStreamReader(System.in)); 
 String line = null; 
 String strCnn = "Provider='sqloledb';Data Source='MySqlServer';" 
 + "Initial Catalog='Pubs';Integrated Security='SSPI';"; 
 int recordDisplaySize = 15; 
 int propertyCount = 0; 
 try 
 { 
 // Open connection and recordset. 
 cnConn1 = new Connection(); 
 cnConn1.open(strCnn); 
 
 rstEmployees = new Recordset (); 
 rstEmployees.open("employee", 
 cnConn1,AdoEnums.CursorType.FORWARDONLY, 
 AdoEnums.LockType.READONLY, AdoEnums.CommandType.TABLE); 
 
 // Display the attributes of the connection. 
 System.out.println("Connection attributes = " 
 + cnConn1.getAttributes()); 
 // Display the attributes of the Employees table's fields. 
 System.out.println("\n\nField attributes : " + "\n"); 
 
 listOfFields = rstEmployees.getFields(); 
 
 for ( int i=0; i < listOfFields.getCount();i++) 
 { 
 System.out.println("\t\t" + listOfFields.getItem(i).getName() 
 + " = " + listOfFields.getItem(i).getAttributes()); 
 } 
 
 // Display fields of the Employees table which are NULLABLE. 
 System.out.println("\n\nNULLABLE Fields : " + "\n"); 
 for ( int i=0; i < listOfFields.getCount();i++) 
 { 
 if ((listOfFields.getItem(i).getAttributes() & 
 AdoEnums.FieldAttribute.ISNULLABLE) > 0) 
 System.out.println("\t\t" + 
 listOfFields.getItem(i).getName()); 
 
 } 
 
 System.out.println ("\n\nPress <Enter> key to continue.."); 
 line = in.readLine(); 
 
 // Display the attributes of the Employees table's properties. 
 System.out.println("\n\nProperty attributes : " ); 
 listOfProperties = rstEmployees.getProperties(); 
 for ( int i=0; i < listOfProperties.getCount() ;i++) 
 { 
 System.out.println("\t\t" + 
 listOfProperties.getItem(i).getName() 
 + " = " + listOfProperties.getItem(i).getAttributes()); 
 
 if (propertyCount == recordDisplaySize) 
 { 
 System.out.println ("\n\nPress <Enter> key to continue."); 
 line = in.readLine(); 
 propertyCount = 0; 
 } 
 propertyCount++; 
 } 
 
 System.out.println ("\n\nPress <Enter> key to continue."); 
 line = in.readLine(); 
 } 
 catch( AdoException ae ) 
 { 
 // Notify user of any errors that result from ADO. 
 
 // Check for null pointer for connection object. 
 if (rstEmployees.getActiveConnection()==null) 
 System.out.println("Exception: " + ae.getMessage()); 
 
 // As passing a Recordset, check for null pointer first. 
 
 if (rstEmployees != null) 
 { 
 PrintProviderError(rstEmployees.getActiveConnection()); 
 } 
 else 
 { 
 System.out.println("Exception: " + ae.getMessage()); 
 } 
 } 
 
 // System read requires this catch. 
 catch( java.io.IOException je) 
 { 
 PrintIOError(je); 
 } 
 
 finally 
 { 
 // Cleanup objects before exit. 
 if (rstEmployees != null) 
 if (rstEmployees.getState() == 1) 
 rstEmployees.close(); 
 if (cnConn1 != null) 
 if (cnConn1.getState() == 1) 
 cnConn1.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"); 
 } 
} 
 
// EndAttributesJ