Get previous / next record

Hi,
I have a little problem with getting the previous / next record.
Because build-in is not working, if user filters and sorts the table, I tried many things to get it managed. My last test was creating a query, returning the previous and next id. I have this PL/SQL statement
DECLARE
str_express varchar2(2000);
str_order varchar2(500);
str_where varchar2(500);
BEGIN
IF :F109_FILTER_PROJECT = 'N' THEN
str_order := 'ORDER BY pro_id desc';
ELSE
str_order := :P250_SORT;
IF :P250_WHERE != '0' THEN
str_where := :P250_WHERE;
END IF;
END IF;
str_express :=
'SELECT DECODE(prev_id, 0, null,' || Chr(39) || 'value=' || prev_id || Chr(39) || ')
FROM (
SELECT pro_id,
nvl(LAG(pro_id) OVER (' || str_order || '), 0) prev_id,
nvl(LEAD(pro_id) OVER (' || str_order || '), 0) next_id
FROM view_project ' ||
str_where || ')
WHERE pro_id = ' || :P251_PRO_ID;
RETURN str_express;
END;
It should just show the previous id and if there is none, should show i.e. 'value=1'. If I let return only the prev_id (code: DECODE(prev_id, 0, null, prev_id) ) it is working fine, if I enter DECODE(prev_id, 0, null,' || Chr(39) || 'value=' || prev_id || Chr(39) || ') it's always showing the error, that prev_id is not declared.
What's wrong?
I thought, I can show buttons for prev and next id in the table with this code:
DECODE(prev_id, 0, null,' || Chr(39) || '<input type="button" class="t10button" value="< Previous" onClick="javascript:html_GetElement(' || Chr(39) || 'P251_PRO_ID' || Chr(39) || ').value = '|| prev_id || ';doSubmit();" />' || Chr(39) || ') prev_id
This is working fine without DECODE syntax, but then also a button is shown, if prev is none.
Any ideas how to manage????
Thanks

Hi,
I now understand why preV_id is not known ... it's way my fault in thinking ...
but how can I set my prev and next ID ... has anybody an idea?
It's very stupid, to move from table to form and back to table and form to get the next / prev record ...
thanks
chrissy

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package Assignment2;
import javax.swing.event.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
import java.util.Vector;
import java.io.*;
public class GUIDatabase extends JFrame implements ListSelectionListener, ActionListener {
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private JTextField fn, mi, ln, t, s, y;
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String action, selectedQName, selectedQDSN, selectedQString;
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private DbSource dbs3 = new DbSource("empdb", true);
private DbSource dbs4 = new DbSource("empdb", true);
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super("Employee Interface");
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JMenuBar menuBar = new JMenuBar();
JMenu navMenu = new JMenu("Navigation");
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navMenu.add(ListeningMenuItem("Prev"));
navMenu.add(ListeningMenuItem("Next"));
navMenu.add(ListeningMenuItem("Last"));
navMenu.add(new JSeparator());
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last = new JButton(new ImageIcon(path + "Last.gif"));
next = new JButton(new ImageIcon(path + "Next.gif"));
prev = new JButton(new ImageIcon(path + "Prev.gif"));
save = new JButton(new ImageIcon(path + "save.gif"));
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last.setToolTipText("Go to Last Record");
next.setToolTipText("Go to Next Record");
prev.setToolTipText("Go to Prev Record");
save.setToolTipText("Save File");
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first.addActionListener(this);
last.addActionListener(this);
next.addActionListener(this);
prev.addActionListener(this);
save.addActionListener(this);
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myToolBar.add(first);
myToolBar.add(prev);
myToolBar.add(next);
myToolBar.add(last);
myToolBar.add(save);
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JTextField fn = new JTextField(30);
JTextField mi = new JTextField(30);
JTextField ln = new JTextField(30);
JTextField t = new JTextField(30);
JTextField s = new JTextField(30);
JTextField y = new JTextField(30);
y.setEditable(false);
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pdNames = new Vector();
JList pd = new JList(pdNames);
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pd.addListSelectionListener(this);
// pd = new JList(myArray);
pd.setFixedCellHeight(20);
pd.setFixedCellWidth(90);
// pd.addListSelectionListener(this);
//labels
LabelComponent fnText = new LabelComponent("First Name", fn);
LabelComponent miText = new LabelComponent("MI", mi);
LabelComponent lnText = new LabelComponent("Last Name", ln);
LabelComponent tCombo = new LabelComponent("Title", titleCombo);
LabelComponent tText = new LabelComponent("Telephone", t);
LabelComponent sText = new LabelComponent("Salary", s);
LabelComponent dCombo = new LabelComponent("Department", departmentCombo);
LabelComponent yText = new LabelComponent("Years in Service", y);
// LabelComponent pdText = new LabelComponent("Project Description", pd);
JPanel p1 = new JPanel();
p1.setLayout(new GridLayout(9, 2, 1, 15));
p1.add(fnText);
p1.add(miText);
p1.add(lnText);
p1.add(tCombo);
p1.add(tText);
p1.add(sText);
p1.add(dCombo);
p1.add(yText);
pdText.add(pd);
// pdText.setEditable(false);
//set layout for frame
setLayout(new BorderLayout());
add(p1, BorderLayout.EAST);
add(myToolBar, BorderLayout.NORTH);
add(pdText, BorderLayout.SOUTH);
//set up the frame properties
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(470, 550);
setLocationRelativeTo(null);
setVisible(true);
if (dbs2.isConnected()) {
boolean two = dbs2.processQuery("select e.FirstName, e.middlename, e.lastname, e.title, e.workphone, format(e.salary, 'currency'), d.departmentname, e.yearsinservice from employees e, departments d", false);
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vc = new Vector();
while (dbs2.nextRecord()) {
vc.addElement(dbs2.getField(4));
titleCombo = new JComboBox(vc);
if (dbs3.isConnected()) {
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if (three) {
vc2 = new Vector();
while (dbs3.nextRecord()) {
vc2.addElement(dbs3.getField(1));
departmentCombo = new JComboBox(vc2);
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if (four) {
vc3 = new Vector();
while (dbs4.nextRecord()) {
vc3.addElement(dbs4.getField(1));
pd.setListData(vc3);
if (dbs.isConnected()) {
boolean one = dbs.processQuery("select * from employees, departments", false);
if (one) {
while (dbs.nextRecord()) {
fn.setText(dbs.getField(2));
mi.setText(dbs.getField(3));
ln.setText(dbs.getField(4));
titleCombo.setSelectedItem(dbs.getField(5));
t.setText(dbs.getField(6));
s.setText(dbs.getField(7));
departmentCombo.setSelectedItem(dbs.getField(9));
y.setText(dbs.getField(8));
//project descriptions method
/* public Vector getProjectDescription() {
String pdSQL = "Select projectDescription from projects;";
source.processQuery(pdSQL, true);
//create new vector for list of project descriptions
pdNames = new Vector();
while (source.nextRecord()) {
pdNames.addElement(source.getField(3));
return pdNames;
JMenuItem ListeningMenuItem(String label) {
JMenuItem mi = new JMenuItem(label);
mi.setActionCommand(label);
mi.addActionListener(this);
return mi;
public void valueChanged(ListSelectionEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
/*public void valueChanged(ListSelectionEvent e) {
//set text boxes, state combo box
String infoSQL = "select * from employees";
if (source.processQuery(infoSQL, false)) {
while (source.nextRecord()) {
fn.setText(source.getField(1));
mi.setText(source.getField(2));
ln.setText(source.getField(3));
t.setText(source.getField(4));
// s.setSelectedItem(source.getField(5));
y.setText(source.getField(6));
// pd.setText(source.getField(7));
throw new UnsupportedOperationException("Not supported yet.");
// class for a labeled component*/
class LabelComponent extends JPanel {
JLabel l;
public LabelComponent(String s, Component c) {
setLayout(new BorderLayout());
l = new JLabel(s);
l.setHorizontalAlignment(SwingConstants.CENTER);
add(l, BorderLayout.WEST);
add(c, BorderLayout.EAST);
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//get command
// String command = e.getActionCommand();
// action = e.getActionCommand();
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source.firstRecord();
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String updateSQL = "UPDATE Employees"
+ " SET first_name = '" + fn.getText() + "',"
+ " middle_name = '" + mi.getText() + "',"
+ " last_name = '" + ln.getText() + "',"
+ " title = '" + titleCombo.getSelectedItem().toString() + "',"
+ " work_phone = '" + t.getText() + "'"
+ " salary = '" + s.getText() + "'"
+ " department = '" + departmentCombo.getSelectedItem().toString() + "'"
+ " yearsinservice = '" + y.getText() + "'";
// + " projectdescription = '" + pd.getSelectedItem().toString() + "'"
// + " WHERE Customer_ID = " + IDText.getText();
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pd.setListData(getProjectDescription());
} catch (Exception a) {
System.out.println(a.toString());
throw new UnsupportedOperationException("Not supported yet.");
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DbSource dbs = new DbSource("empdb", true);
if (!dbs.isConnected()) {
System.out.println("Connection Error: " + dbs.getErrorMessage());
System.exit(1);
GUIDatabase m = new GUIDatabase();
m.setVisible(true);
m.setLocationRelativeTo(null);
m.setDefaultCloseOperation(EXIT_ON_CLOSE);
PHP Code:
package Assignment2;
import java.sql.*;
public class DbSource {
public ResultSet rs;
public ResultSetMetaData rsmd;
public String error;
public Connection con;
public DbSource(String b, boolean a) {
try {
String dataSource;
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Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
//Evaluate connection type
if (a) {
dataSource = "jdbc:odbc:" + b;
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con = DriverManager.getConnection(dataSource, null, null);
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error = e.toString();
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//test for connection validity
boolean x;
try {
if (con == null || con.isClosed()) {
x = false;
} else {
x = true;
return x;
} catch (SQLException e) {
error = e.toString();
return false;
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//process sql statement passed along with whether to allow bidirectional scrolling
try {
Statement stmt;
if (s) {
stmt = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,
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rs = stmt.executeQuery(sqlSelect);
//ResultSet MetaData
rsmd = rs.getMetaData();
catch (SQLException e) {
error = (e.toString());
rs = null;
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// process Update
try {
int nbr = 0;
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nbr = stmt.executeUpdate(sqlStatement);
return nbr;
} catch (SQLException e) {
error = e.toString();
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//proceed to next record
try {
if (rs.next()) {
return true;
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return false;
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error = e.toString();
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boolean a = false;
try {
if (rs.previous()) {
a = true;
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} catch (SQLException e) {
error = e.toString();
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try {
rs.first();
return true;
} catch (SQLException e) {
error = e.toString();
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try {
rs.last();
return true;
} catch (SQLException e) {
error = e.toString();
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try {
String a = rs.getString(x);
return a;
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error = (e.toString());
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try {
String a = rsmd.getColumnName(x);
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} catch (SQLException e) {
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error = e.toString();
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try {
int a = rsmd.getColumnCount();
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nbrRows++;
String[] tblNames = new String[nbrRows];
rs = dbmd.getTables(null, null, "%", tables);
nbrRows = 0;
while (rs.next()) {
tblNames[nbrRows] = rs.getString(3);
nbrRows++;
return tblNames;
} catch (Exception e) {
error = e.toString();
return null;
public String resultSetToXML() {
//turn result set to XML formatting
String rsToXML = "";
try {
rsmd = rs.getMetaData();
// begin to write XML document
rsToXML += ("<?xml version="1.0\"?>\r\n");
// Root node
rsToXML += ("<ResultSet>");
// get metadata into XML document
rsToXML += (" <MetaData>");
for (int i = 1; i <= getFieldCount(); i++) {
rsToXML += (" <Column>" + getFieldName(i) + "</Column>");
rsToXML += (" </MetaData>");
// get data into XML document
rsToXML += (" <Data>");
while (rs.next()) {
rsToXML += (" <Row>");
for (int i = 1; i <= getFieldCount(); i++) {
rsToXML += (" <" + getFieldName(i) + ">"
+ rs.getString(i)
+ "</" + getFieldName(i) + ">");
rsToXML += (" </Row>");
rsToXML += (" </Data>");
rsToXML += ("</ResultSet>");
} catch (Exception e) {
error = e.toString();
return rsToXML;
}

805487 wrote:
it is a lot of code but i just need to figure out how to get to the next record under the action performed. Thank you for your time!!!It's too much code and it's unformatted. Put tags on both sides of the code (check that it works with the preview button), then ask an exact question (none of those "I don't know what to do" ones).

Create NEXT RECORD button on form

I want to create a NEXT RECORD and PREVIOUS RECORD button on my form. how do I do this so that the buttons are function.

Review the discussions at
http://forums.oracle.com/forums/search.jspa?threadID=&q=get+next+record+process&objID=f137

User Interface : position for previous/next links when browsing spreadsheet

Hello,
When you have a reasonable number of columns to display the html page width can be quite large. So you have to scroll right to get the previous/next set of records hyperlinks controls because by default they are located at the bottom right corner of the spreadsheet. This is not very user friendly.
Is there a mean to specify a different location for the previous/next set of records hyperlinks controls ?
Thanks in advance for your response. It will considerably enhance my apex experience.

Yes, the "Pagination Display Position" lets you control where the pagination shows up. So you could put it top left, top right, bottom left, bottom right. IMHO there are pros and cons to each position.
Mike

Get previous / next record

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