NextRecordset Method Example (VJ++)
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NextRecordset Method Example (VJ++)

 

This example uses the NextRecordset method to view the data in a recordset that uses a compound command statement made up of three separate SELECT statements.

// BeginNextRecordsetJ
import java.io.*;
import com.ms.wfc.data.*;

public class NextRecordsetX
{
   // The main entry point for the application.

   public static void main (String[] args)
   {
      NextRecordsetX();
      System.exit(0);
   }
   // NextRecordsetX Function
   static void NextRecordsetX()
   {
      // Define ADO Object
      Recordset rstCompound = null;

      // Declarations
      BufferedReader in = 
         new BufferedReader(new InputStreamReader(System.in));
      String strCnn;
      int intCount;
      int intDisplayRecords = 15;
      int intRecordCount;

      try
      {
         // Open compound recordset.
         strCnn = "Provider='sqloledb';Data Source='MySqlServer';" +
             "Initial Catalog='Pubs';Integrated Security='SSPI';";

         rstCompound = new Recordset();
         rstCompound.open("select * from Authors;" +
             "select * from stores;" +
             "select * from jobs", strCnn, AdoEnums.CursorType.FORWARDONLY, 
            AdoEnums.LockType.READONLY,AdoEnums.CommandType.TEXT);

         // Display results from each select statement.
         intCount=1;

         while (rstCompound != null)
         {  
            System.out.println(
               "Contents of recordset #" + intCount + "\n");
            intRecordCount = 0;

            while(!rstCompound.getEOF())
               {
                  System.out.println(
                     rstCompound.getField(0).getString()+" " + 
                     rstCompound.getField(1).getString());
                  intRecordCount++;

                  rstCompound.moveNext();
                  if ( intRecordCount == intDisplayRecords)
                  {
                     System.out.println("\nPress <Enter> to continue..");
                     in.readLine();
                     intRecordCount = 0;
                  }
               }
            System.out.println("\nPress <Enter> to continue..");
            in.readLine();

            rstCompound = rstCompound.nextRecordset(); 

            intCount++;
         }
      }
      // System read requires this catch.
      catch(java.io.IOException je)
      {
         PrintIOError(je);
      }
      catch(AdoException ae)
      {
         // Notify the user of any errors that result from ADO.

         // As passing a recordset. check for the null pointer first
         if(rstCompound!=null)
         {
            PrintProviderError(rstCompound.getActiveConnection());
         }
         else
         {
            System.out.println("Exception: " + ae.getMessage());
         }
      }
      catch(java.lang.NullPointerException ne)
      {
         System.out.println("Error Description: " + ne.getMessage());
      }   

      finally
      {
         // Cleanup objects before exit.   
         if (rstCompound != null)
            if (rstCompound.getState() == 1)
               rstCompound.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");
   }
}
// EndNextRecordsetJ

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