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MaxRecords Property Example (VJ++)

This example uses the MaxRecords property to open a Recordset containing the 10 most expensive titles in the Titles table.

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

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

   public static void main (String[] args)
   {
      MaxRecordsX();
      System.exit(0);
   }
   // MaxRecordsX Function

   static void MaxRecordsX()
   {
      //  Define ADO Objects
      Recordset rstTemp = null;

      try
      {
         // Declarations
         BufferedReader in = 
            new BufferedReader(new InputStreamReader(System.in));

         // Open recordset containing the 10 most expensive
         // titles in the Titles table.
         String strCnn = " Provider='sqloledb';Data Source='MySqlServer';"+
            " Initial Catalog='Pubs';Integrated Security='SSPI';";
         rstTemp = new Recordset();
         rstTemp.setMaxRecords(10);
         rstTemp.open("select title,price from Titles" + 
            " order by price desc", strCnn,AdoEnums.CursorType.FORWARDONLY, 
            AdoEnums.LockType.READONLY, AdoEnums.CommandType.TEXT);

         // Display the contents of the recordset.
         System.out.println("Top Ten Titles by Price:\n");
         while (!rstTemp.getEOF())
         {
            System.out.println(" "+ rstTemp.getField("title").getString() +
               " - " + rstTemp.getField("Price").getString());
            rstTemp.moveNext();
         }

         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 (rstTemp!=null)
         {
            PrintProviderError(rstTemp.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 (rstTemp != null)
            if (rstTemp.getState() == 1)
               rstTemp.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");
   }
}
// EndMaxRecordsJ

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