Type Property Example (Field) (VJ++)

This example demonstrates the Type property by displaying the name of the constant that corresponds to the value of the Type property of all the Field objects in the Employees table. The FieldType function is required for this procedure to run.

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

public class TypeFieldX
{

   // The main entry point of the application.

   public static void main (String[] args)
   {
      TypeFieldX();
      System.exit(0);
   }
   
   // TypeFieldX Function
   static void TypeFieldX()
   {
      // Define ADO Objects.
      Recordset rstEmployees = null;
      Field fldLoop = null;

      // Declarations.
      String strCnn = "Provider='sqloledb';Data Source='MySqlServer';"+
                "Initial Catalog='Pubs';Integrated Security='SSPI';";
      int intLoop;
      int intRecordCount = 0;
      BufferedReader in = 
         new BufferedReader(new InputStreamReader(System.in));

      try
      {
         // Open the Recordset with data from Employees table.
         rstEmployees = new Recordset();
         rstEmployees.open("employee", strCnn, 
            AdoEnums.CursorType.FORWARDONLY, AdoEnums.LockType.READONLY, 
            AdoEnums.CommandType.TABLE);

         System.out.println("Fields in the Employees table:\n");

         // Enumerate fields collection of Employees table.
         for(intLoop = 0;intLoop < 
            rstEmployees.getFields().getCount();intLoop++)
         {
            intRecordCount++;
            // Loop needed for display of records
            if((intRecordCount % 6)==0)
            {
               System.out.println("Press <Enter> to continue..");
               in.readLine();
            }

            fldLoop = rstEmployees.getFields().getItem(intLoop);
            System.out.println("  Name:" + fldLoop.getName() + "\n"+
               "  Type:" + FieldType(fldLoop.getType()) + "\n");

         }
         System.out.println("Press <Enter> to continue");
         in.readLine();
      }
      catch(AdoException ae)
      {
         // Notify the user of any errors that result from ADO.

         // As passing a Recordset, check for the 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();
      }
   }
   // FieldType Function
   static String FieldType( int intType )
   {
      String strLoop = null;

         switch(intType)
         {
         case AdoEnums.DataType.CHAR:
            strLoop = "adChar";
            break;
         case AdoEnums.DataType.VARCHAR:
            strLoop ="adVarChar";
            break;
         case AdoEnums.DataType.SMALLINT:
            strLoop = "adSmallInt";
            break;
         case AdoEnums.DataType.UNSIGNEDTINYINT:
            strLoop = "adUnsignedTinyInt" ;
            break;
         case AdoEnums.DataType.DBTIMESTAMP:
            strLoop = "adDBTimeStamp";
            break;
         default:
            break;
         }

      return strLoop;
   }

   // 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("\t Source: " + je.getClass() + "\n");
      System.out.println("\t Description: "+ je.getMessage() + "\n");
   }
}
// EndFieldTypeJ

See Also

Field Object | Type Property