MarshalOptions-Eigenschaft (Beispiel) (VJ++)

Gilt für: Access 2013, Office 2013

In diesem Beispiel wird die MarshalOptions-Eigenschaft verwendet, um die Zeilen anzugeben, die an den Server zurückgesendet werden: alle Zeilen oder nur geänderte Zeilen.

 
// BeginMarshalOptionsJ 
import java.io.*; 
import com.ms.wfc.data.*; 
 
public class MarshalOptionsX 
{ 
 // The main entry point for the application. 
 public static void main (String[] args) 
 { 
 MarshalOptionsX(); 
 System.exit(0); 
 } 
 // MarshalX Function 
 
 static void MarshalOptionsX() 
 { 
 // Define ADO Objects 
 Recordset rstEmployees = null; 
 
 // Declarations 
 BufferedReader in = 
 new BufferedReader(new InputStreamReader(System.in)); 
 String line = null; 
 
 try 
 { 
 
 // Open Recordset with names from Employees Table. 
 String strCnn = " Provider='sqloledb';Data Source='MySqlServer';" + 
 "Initial Catalog='Pubs';Integrated Security='SSPI';"; 
 
 rstEmployees = new Recordset(); 
 rstEmployees.setCursorType(AdoEnums.CursorType.KEYSET); 
 rstEmployees.setLockType(AdoEnums.LockType.OPTIMISTIC); 
 rstEmployees.setCursorLocation(AdoEnums.CursorLocation.CLIENT); 
 
 rstEmployees.open( 
 "SELECT fname,lname from Employee ORDER BY lname", 
 strCnn,AdoEnums.CursorType.KEYSET, 
 AdoEnums.LockType.OPTIMISTIC, AdoEnums.CommandType.TEXT); 
 
 // Store original data 
 String strOldFirst = rstEmployees.getField("fname").getString(); 
 String strOldLast = rstEmployees.getField("lname").getString(); 
 
 // Change data in edit buffer 
 rstEmployees.getField("fname").setString("Linda"); 
 rstEmployees.getField("lname").setString("Kobara"); 
 
 // Show contents of buffer and get user input 
 String strMessage = "Edit in progress: "+ "\n"+ 
 "Original Data = \t"+ strOldFirst +" "+ 
 strOldLast + "\n" + "Data in Buffer = \t"+ 
 rstEmployees.getField("fname").getString()+ " " + 
 rstEmployees.getField("lname").getString()+"\n"+"\n"+ 
 "Use Update to replace the original data with " + 
 "the buffered data in the recordset"; 
 String strMarshalAll = "Would you like to send all the rows" + 
 " in the recordset back to the server"; 
 String strMarshalModified = "Would you like to send only "+ 
 " modified rows back to the server"; 
 
 System.out.println(strMessage + "\nEnter (Y/N)..."); 
 
 if (in.readLine().equalsIgnoreCase("Y")) 
 { 
 System.out.println(strMarshalAll); 
 System.out.println("\nEnter (Y/N)..."); 
 
 if(in.readLine().equalsIgnoreCase("Y")) 
 { 
 rstEmployees.setMarshalOptions(AdoEnums.MarshalOptions.ALL); 
 rstEmployees.update(); 
 } 
 else 
 { 
 System.out.println(strMarshalModified); 
 System.out.println("\nEnter (Y/N)..."); 
 
 if (in.readLine().equalsIgnoreCase("Y")) 
 { 
 rstEmployees.setMarshalOptions( 
 AdoEnums.MarshalOptions.MODIFIEDONLY); 
 rstEmployees.update(); 
 } 
 } 
 
 } 
 
 // Show the resulting data 
 System.out.println("\nData in recordset = " + 
 rstEmployees.getField("fname").getString() + 
 " " + rstEmployees.getField("lname").getString()); 
 
 // Restore original data because this is a demonstration 
 if (!((strOldFirst.equals(rstEmployees.getField("fname"))) 
 &&(strOldLast.equals(rstEmployees.getField("lname"))))) 
 { 
 rstEmployees.getField("fname").setString(strOldFirst); 
 rstEmployees.getField("lname").setString(strOldLast); 
 rstEmployees.update(); 
 } 
 
 System.out.println("\n\nPress <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(rstEmployees!= null) 
 { 
 PrintProviderError(rstEmployees.getActiveConnection()); 
 } 
 else 
 { 
 System.out.println("Exception: " + ae.getLocalizedMessage()); 
 } 
 } 
 
 // 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(); 
 } 
 } 
 
 // 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"); 
 } 
} 
// EndMarshalOptionsJ