AbsolutePosition and CursorLocation Properties Example (VJ++)

AbsolutePosition and CursorLocation Properties Example (VJ++)

This example demonstrates how the AbsolutePosition property can track the progress of a loop that enumerates all the records of a Recordset. It uses the CursorLocation property to enable the AbsolutePosition property by setting the cursor to a client cursor.

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

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

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

    //.AbsolutePositionX function

    static void AbsolutePositionX()
    {

        // define ADO Objects.
        Recordset rstEmployees = null;

        // Declarations.
        BufferedReader in = 
            new BufferedReader(new InputStreamReader(System.in));
        String line = null;
        String strCnn = "Provider=sqloledb;Data Source=srv;" +
            "Initial Catalog=pubs;User Id=sa;Password=;";

        String strLName;
        String strMessage;
        String strAbsolutePosition,strRecordCount;
        int intAbsolutePosition;
        int intRecordCount;
        int intChoice;
        
        try
        {

            rstEmployees = new Recordset();

            // Use client cursor to enable AbsolutePosition property.
            rstEmployees.setCursorLocation( AdoEnums.CursorLocation.CLIENT);

            // Open a recordset for Employees table using a client cursor.
            rstEmployees.open("employee", strCnn,
                AdoEnums.CursorType.FORWARDONLY ,
                AdoEnums.LockType.READONLY,
                AdoEnums.CommandType.TABLE);

            // Enumerate Recordset.
            while ( !rstEmployees.getEOF()) // continuous loop
            {
                intRecordCount = rstEmployees.getRecordCount();
                strRecordCount = Integer.toString(intRecordCount);

                // Read data field in the variables.
                strLName = rstEmployees.getField("lname").getString();
                intAbsolutePosition = rstEmployees.getAbsolutePosition();
                strAbsolutePosition = Integer.toString(intAbsolutePosition);

                // Display current record information.
                strMessage = "\nEmployee: " + strLName + "\n" + "(Record " + 
                    strAbsolutePosition + " of " +strRecordCount + " )";
                System.out.println(strMessage);
                System.out.println(
                    "\nDo you want to continue (1 -> Yes / 2 -> No)?");
                //user types a number followed by enter (cr-lf).
                line = in.readLine().trim();
                intChoice = Integer.parseInt(line);
                if ( intChoice != 1)
                    break;
                rstEmployees.moveNext();
            }

            //Cleanup objects before exit.
            rstEmployees.close();
        }

        catch( NumberFormatException ne)
        {
            System.out.println("\nException : Integer Input required.");
            System.exit(0);
        }

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

            // Check for null pointer for connection object.
            if (rstEmployees.getActiveConnection()== null)
                System.out.println("Exception: " + ae.getMessage());
            // As passing a Recordset, check for 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);
        }
    }

    // PrintProviderError Function

    static void PrintProviderError( Connection Cnn1 )
    {
        // Print Provider errors from Connection object.
        // ErrItem is an item object in the Connection’s 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");
    }
}