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NumericScale and Precision Properties Example (VJ++)

This example uses the NumericScale and Precision properties to display the numeric scale and precision of fields in the Discounts table of the Pubs database.

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

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

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

   // NumericScaleX function

   static void NumericScaleX()
   {

      // Define ADO Objects.
      Recordset rstDiscounts = null;
      Field fldTemp = null;

      // Declarations.
      BufferedReader in = 
         new BufferedReader (new InputStreamReader(System.in));
      String strCnn = "Provider='sqloledb';Data Source='MySqlServer';"
          + "Initial Catalog='Pubs';Integrated Security='SSPI';";
      int intLoop;

      try
      {
         rstDiscounts = new Recordset();

         // Open recordset.
         rstDiscounts.open("Discounts", strCnn,
                    AdoEnums.CursorType.FORWARDONLY,
                    AdoEnums.LockType.READONLY,
                    AdoEnums.CommandType.TABLE);

         // Display numeric scale and precision of
         // numeric and small integer fields.
         for ( intLoop=0; intLoop < 
            rstDiscounts.getFields().getCount();intLoop++)
         {
            fldTemp = rstDiscounts.getFields().getItem(intLoop);
            if((fldTemp.getType()== AdoEnums.DataType.NUMERIC) |
               (fldTemp.getType()== AdoEnums.DataType.SMALLINT))
            {
               System.out.println("\nField: "
                  + fldTemp.getName());
               System.out.println("\nNumeric scale: "
                  + fldTemp.getNumericScale());
               System.out.println("\nPrecision: "
                  + fldTemp.getPrecision());
               System.out.println("\n\nPress <Enter> to continue..");
               in.readLine();
            }
         }

      }
      catch( AdoException ae )
      {
         // Notify user of any errors that result from ADO.

         // As passing a Recordset, check for null pointer first.
         if (rstDiscounts != null)
         {
            PrintProviderError(rstDiscounts.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 (rstDiscounts != null)
            if (rstDiscounts.getState() == 1)
               rstDiscounts.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");
   }
}
// EndNumericScaleJ

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