Displaying resultset one record at a time

This is a rather long question, but I have never done any projects like this before with Java.
I have an application in which users can view each record within a range of values one at a time. I have created a recordset that is sorted by one column in the resultset. What is the best way to display each record using forward/back buttons to "flip" through each record? How would I keep track of which record in the set I am actually displaying so I can move to either the next or previous depending on which button the user selects? Another problem I have is whether a particular button should be disabled?
Thanks in advance,
Chris

Try this link
http://www.theserverside.com/resources/article.jsp?l=DataListHandler
Select the Read PDF here link and it will download the PDF for you to read.
It's a pattern for the sort of problem that you describe. It comes complete with source code that you could use.
If you wish you can contact me via e-mail and I'll email you a working example.
Dave

Similar Messages

Displaying one record at a time

Is any body able to help me? I need to display one record at a time from a Select statement.
Could I copy the results of the Select query from a table into an array for later display or is there a better alternative.
Please, any part knowledge with regard to the above would be usefull.
Regards
Eddie

What application do you want to use to display the data?
You can use "rownum" in your SQL statement to ensure that you only get record N of a query. Asktom has a good article on this sort of windowing
http://asktom.oracle.com/pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:127412348064
More commonly, however, you'll write a SQL query that returns all the rows, fetch a small number, display those to the user, and then fetch more records.
Justin

Master_detail for more than one record at a time

Hi,
How can i display master_detail records for more than one records at a time, for example, i have two tables A and B , A has username and role and B has username and profile. here i wanted to display 10 users at a time on my 6i form with username, role and profile.
i have created a master-detail relation ship with these tables when i'm executing F8 on blcok A , it displays 10 records on BlockA but, only one at a time on block B, how can i display all corresponding records on block B at a time.
Thanks for your help.Bcj

Thanks Roberts, that was realy informative due to some doubts i would like to confirm my requirements , i have two blocks A and B and each master record has only one detail record. but i wanted to display at least 10 master_detail relationships(records) on the form at a time, i would like to know is it possible to do without creating any table or view for example,
data in table A,
username role
AAA R1
BBB R2
CCC R3
data in table B,
username profile
AAA P1
BBB P2
CCC P3
i wanted to display it on form like below,
username role profile
AAA R1 P1
BBB R2 P2
CCC R3 P3
Also would like to know that how can i select data from dba_users, any restriction is there on forms 6i, i can select it on sqlplus.
Thanks Again, Bcj

Challenge involving creating a file on GUI & seeing one record at a time...

Hi,
If anyone can help me with this project I'd be most appreciative. I'll try and explain the problem the best I can. I'm adding students to a database at a university they're either a Graduate or an Undergraduate. I'm taking in first, lastname's, ssn, & ACT/SAT/GMAT test results. I have a GUI called StudentRecord that has all the JTextFields, JButton's, etc. I'm also writing it to a .txt file called StudentDA. For this I used a BufferedFile reader.
What I really need is on my StudentRecord when I click the display button I want it to show one record at a time in another JFrame. This other JFrame I named it display. I'm trying to create an instance of JFrame inside of the actionPerformed for StudentRecord but when I click display nothing happens.
I adding the students with a vector that I'm calling v. I want the Display to read from the .txt file and display one at a time hence next, and previous. I'm going to post the tidbit of relevant code. If anyone can help me you'd be my hero for the day for all time I've tried to get this to work.
Here's the StudentRecord (GUI) display part:
      public void actionPerformed( ActionEvent event )
     try {
          Display d = new Display(StudentDA.v);
         }//end try
        //catch right here no problems with this..Here's the DataAccess part:
public class StudentDA{
static Vector v = new Vector();;
static String pathName = "a:/Final Project/test1.txt";
static File studentFile = new File(pathName);
static String status;
public StudentDA() {}
public static void initialize() {
    if (studentFile.exists() && studentFile.length() !=0) {
     try{
      BufferedReader in = new BufferedReader(new
      FileReader(studentFile) );
      do{
         status = in.readLine();
          if(status.equals ("uGrad")) {
            uGrad u = new uGrad();
            u.setFName(in.readLine() );
            u.setLName(in.readLine() );
            u.setssNum(Integer.parseInt(in.readLine()) );
            u.setACT(Integer.parseInt(in.readLine() ));
            v.add(u);
            System.out.println(u + "inside ugrad");
          }//end if uGrad
          else{
            if(status.equals("Grad")) {
            //same process as uGrad
            v.add(g);
          }//end else Grad
      }while (status != null);
    }//end try statement
    catch (Exception e) {
      }//end catch
    }//end if there's something there
}//end method initialize
//creating the terminate method
public static void terminate() {
    try{
      PrintStream out = new PrintStream ( new
      FileOutputStream (studentFile) );
      for (int i = 0; i < v.size(); i++) {
        Student s = (Student) v.elementAt(i);
        String p = s.printRecord();
        StringTokenizer rt = new StringTokenizer(p, "\t");
        while (rt.hasMoreTokens() ) {
          out.println(rt.nextToken() );
          }//end while
      }//end for loop
    }//end try loop
    catch (Exception e){
    }//end catch
}//end terminate
public static void add(Student s){// throws DuplicateException{
          boolean duplicate = false;
          for(int i = 0; i < v.size(); i++){
               if(s.getssNum() == ((Student)(v.elementAt(i))).getssNum()){
                    duplicate = true;
                    break;
               if(duplicate){
                    throw new DuplicateException("Student Already Exists");
               else{
                    v.add(s);
}//end add method
}//end classHere's the display class:
public class Display extends JFrame {
     private JButton Next, Previous;
     private JTextField statusField, firstField, lastField, socialField, advPlacementField, actField;
     private JLabel statusLabel, firstLabel, lastLabel, socialLabel, advPlacementLabel, actLabel;
     private JPanel fieldPanel, buttonsPanel;
     private JTextArea displayArea;
     static int count = 0;
     static String status;
     public Display(){}
public Display(Vector v){
     //setting up the GUI components for the display class here
     //JTextAreas & JLabels
     buttonsPanel = new JPanel();
     buttonsPanel.setLayout(new GridLayout(1,2));
    Next = new JButton("Next");
    buttonsPanel.add(Next);
    Next.addActionListener(
    new ActionListener() {
      public void actionPerformed( ActionEvent event )
          //try to catch display errors
       try {
                    count++;
                 displayData(count);
                 //displayData();
      }//end try
          catch {
         }//end catch
      } // end actionPerformed
    } // end anonymous inner class
    ); // end call to addActionListener
    buttonsPanel.add(Next);
    Previous = new JButton("Previous");
    buttonsPanel.add(Previous);
    Previous.addActionListener(
    new ActionListener() {
      public void actionPerformed( ActionEvent event )
          //try to catch display errors
          try {
               count--;
               displayData(count);
               //displayData();
         }//end try
          catch {
         }//end catch
      } // end actionPerformed
    } // end anonymous inner class
    ); // end call to addActionListener
}//end display() constructor
public void displayData(int count) {
     StudentDA.initialize();
       if (status.equals ("uGrad")) {
       //these are all part of the StudentRecord GUI not Display GUI
            fieldPanel.setVisible(true);
            buttonsPanel.setVisible(true);
            actLabel.setVisible(true);
            actField.setVisible(true);
            advPlacementLabel.setVisible(false);
            advPlacementLabel.setVisible(false);
       }//end if
       else {
            if(status.equals ("Grad")) {
             fieldPanel.setVisible(true);
             buttonsPanel.setVisible(true);
             actLabel.setVisible(false);
             actField.setVisible(false);
             advPlacementLabel.setVisible(true);
             advPlacementLabel.setVisible(true);
              }//end if
       }//end else
}//end method displayData()
public static void main ( String args[] )
    Display application = new Display();
    application.addWindowListener(
          new WindowAdapter(){
               public void windowClosing( WindowEvent e)
                    System.exit(0);
    application.setSize( 300, 200);
    application.setVisible( true );
};//end main
}//end class Display{}I know this is long but if anyone can help I'd greatly appreciate it. Please ask me if you need me to clarify something, I tried to not make it way too long. --rockbottom01


I'm not really too sure what it is that you are after, but here is some code, that loads up an array with each line of a .txt file, then displays them. I hope you can make use of a least some of it.
just ask if you don't understand any of the code.
String array[];
int i;
public Test() {
          readFile("file.txt");
          i = 0;
          nextEntry();
     public void nextEntry() {
          Display display = new Display();
          display.show();
     class Display extends JFrame implements ActionListener {
          JLabel label1;
          JButton button;
          public Display() {
               label1 = new JLabel(array);
               button = new JButton("OK");
               getContentPane().setLayout(new FlowLayout());
               getContentPane().add(label1);
               getContentPane().add(button);
               button.addActionListener(this);
          public void actionPerformed(ActionEvent e) {
               setVisible(false);
               i++;
               if(i < array.length) {
                    nextEntry();
     public void readFile(String fileName) {
          String s, s2 = "";
          int lineCount = 0;
          BufferedReader in;
          try {
               in = new BufferedReader(new FileReader(fileName));
               while((s = in.readLine()) != null) {
                    lineCount++;
               array = new String[lineCount];
               in.close();
               in = new BufferedReader(new FileReader(fileName));
               int j = 0;
               while((s = in.readLine()) != null) {
                    array[j] = s;
                    j++;
          catch(IOException e) {
               System.out.println("Error");

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Hi all,
I have to use ALV report. Each record on the report output should have a button (or radio button) which will allow the record to be selected. My requirement is to select only one record at a time.
please guide me how to proceed further.
regards
manish

hi
https://www.sdn.sap.com/irj/sdn/wiki?path=/display/snippets/sampleCheckBoxProgram
Regards
Pavan

How to display only one record.

Hi Gurus,
Here my requirement is i have 2 pages.
first page having project_number lov,create and tableRN.
once u select the projectnumber and click on the create button it is navigate to secound page,here enter the data and click on the submit button it ll insert into database table and navigate to fitst page and display the data in tableRN what ever u insert the data(this part is over).
but the problem is, in tableRN displays all the records(previous records also displayed)
my requirement is display only one record(click on the submit button at the time of record only).
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its very urgent.
Thanks
Seshu.
Edited by: its urgent on Jan 3, 2012 10:52 PM

Seshu,
Do u want to display the inserted row...
Regards,
Gyan
www.gyanoracleapps.blogspot.com
www.querenttech.com

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Hi !
One of our Java folks here need at function where he reads one record at at time in id order;
create table url_recs (id number, url varchar2(4000));
insert into url_recs values(1,'www.fona.dk');
insert into url_recs values(2,'www.dr.dk');
insert into url-recs values(17,'www.ihk.dk');
select read_rec() from dual; - get id 1
select read_rec() from dual; - get id 2
select read_rec() from dual; - get id 17
select read_rec() from dual; - get id 1 - "no more rows - start all over again)
select read_rec(45) from dual; - get NULL (no rows with that id)
select read_rec(1) from dual; - get id 1
The purpose id for some "round robin" trying to get to some internal URL's.
Can you give me a hint for creating the function(s)
best regards
Mette

Will successive calls come on the same Oracle session? Or across different Oracle sessions?
If you're going to call the function multiple times within the same Oracle session, you could store the last value returned in a package variable and select the record whose ID is greater than that value every time the function is called. That's unlikely to do exactly what the Java developer is hoping, though, because the Java calls are likely to bounce between multiple Oracle sessions due to connection pooling. And it'll likely require that the Java developer (or app server admin) adds some code when they get a connection from the pool where they reset the package state. Or it'll require that someone develop a method to keep the Java and Oracle session state in sync.
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Where do u want to delete the record - database?
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You should be posting in the advanced queuing forum.
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     '''Override the CrystalReportButton_Click and call DisplayReportAsPDF_CrystalReportButton function
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      Dim fileName As String = "test.rpt"
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          Dim errMsg As String = ex.Message.Replace(Chr(13).ToString(), "").Replace(Chr(10).ToString(), "")
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Dim paramValue As CrystalDecisions.Shared.ParameterDiscreteValue = New CrystalDecisions.Shared.ParameterDiscreteValue()
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           crReportDocument.SetParameterValue("Orders", 67)
DisplayReportAsPDF_CrystalReportButton(crReportDocument)
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          Dim errMsg As String = ex.Message.Replace(Chr(13).ToString(), "").Replace(Chr(10).ToString(), "")
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Please refer to the note below:
Note 1575981
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Hello Experts,
I built an import map to run it manually with import manager, but when I click on Ready to Import, the import manager is doing one record at a time. I have to go back to the match tab and refresh in order to import the rest.
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Thanks,
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i am trying to display one record from my database on my jsp page per time using next and previous buttons to navigate. I have tried to implement this by putting the resultset in a vector and then tried to tried to dispaly data with no success.Please somebody help ,i been at this for two days with no success.Could someone give a concreate example to guide me

Please post all code, i dont know how to put my resultset in a vector or arraylist.
I need a First Previous next and Last link in asp it is called recordset paging or recordset navigation.
<%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" errorPage="" %>
<%@ include file="Connections/connEvents.jsp" %>
<%
int index = 0; //or wherever you wish to start
if((String s = request.getParameter("index")) != null)
index = Integer.parseInt(s);
%>
<%
Driver DriverrsEvents = (Driver)Class.forName(connEvents_DRIVER).newInstance();
Connection ConnrsEvents = DriverManager.getConnection(connEvents_STRING,connEvents_USERNAME,connEvents_PASSWORD);
//PreparedStatement StatementrsEvents = ConnrsEvents.prepareStatement("SELECT * FROM hog_evenementen", ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
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//ResultSet rsEvents = StatementrsEvents.executeQuery();
PreparedStatement StatementrsEvents = ConnrsEvents.prepareStatement("SELECT * FROM hog_evenementen");
ResultSet rsEvents = StatementrsEvents.executeQuery();
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>HD - Evenementen-beheer</title>
<style type="text/css">

</style></head>
<script>
function post(actValue)
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document.MyForm.submit() ;
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<body>
<table width="60%" border="0" align="center" cellpadding="0" cellspacing="0" class="">
<tr>
<td><table width="100%" class="" border="0" cellpadding="6" cellspacing="0">
<tr>
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<td bgcolor="#333333" class=""><span class=""><span class="formField">
</span></span></td>
</tr>
</table></td>
</tr>
<tr>
<td><table width="100%" border="0" cellspacing="0" cellpadding="6">
<tr bgcolor="#61ABD0" class="verdana10zwart">
<td width="4"> </td>
<td width="512" height="29"> <span class="">Evenementenoverzicht</span></td>
</tr>
<tr bgcolor="#61ABD0" class="">
<td> </td>
<td><table width="100%" border="0" align="center" cellpadding="6" cellspacing="0">
<tr class="">
<td width="252" class="smallText">record 1 van 1 etc moet hier komen <br></td>
<td width="231" align="left" class="smallText"><table width="50%" border="0" align="center">
<tr>
<td width="23%" align="center"> Firs </td>
<td width="23%" align="center"> <a href="index.jsp?index=<%= (index-10)%>">Previous</a></td>
<td width="23%" align="center"><a href="index.jsp?index=<%= (index+10)%>">Next</a></td>
<td width="23%" align="center">Last</td>
</tr>
</table>
<br>
</td>
</tr>
<tr bgcolor="#CCCCCC">
<td>Thema</td>
<td>Datum</td>
</tr>
               <%
               int rowCount = 0;
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<tr>
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<td width="231"><%= rsEvents.getObject("datum")%></td>
</tr>
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</table></td>
</tr>
</table></td>
</tr>
<tr>
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<table width="100%" border="0" cellpadding="6" cellspacing="0" class="verdana10zwart">
<tr bgcolor="#CCCCCC">
<td width="9"> </td>
<td colspan="2"><span class="kop1"><br>
Evenement toevoegen </span><span class="formField"><br>
</span><br>
<span class="formField"> </span></td>
</tr>
<tr bgcolor="#CCCCCC">
<td width="9"> </td>
<td width="107" class="downBorder">Thema:</td>
<td width="383" class="downBorder"><input name="thema" type="text" id="thema"></td>
</tr>
<tr bgcolor="#CCCCCC">
<td width="9"> </td>
<td class="downBorder">Omschrijving:</td>
<td class="downBorder"><textarea name="omschrijving" cols="40" rows="10" id="omschrijving"></textarea>
               </td>
</tr>
<tr bgcolor="#CCCCCC">
<td width="9"> </td>
<td class="downBorder">Datum:</td>
<td class="downBorder"><input name="datum" type="text" id="datum"></td>
</tr>
<tr bgcolor="#CCCCCC">
<td width="9"> </td>
<td class="downBorder">Tijd:</td>
<td class="downBorder"><input name="tijd" type="text" id="tijd"></td>
</tr>
<tr bgcolor="#CCCCCC">
<td width="9"> </td>
<td class="downBorder">Lokatie:</td>
<td class="downBorder"><input name="lokatie" type="text" id="lokatie"></td>
</tr>
<tr bgcolor="#CCCCCC">
<td width="9"> </td>
<td class="downBorder">Plaatje:</td>
<td class="downBorder"><input name="plaatje" type="text" id="plaatje"></td>
</tr>
<tr bgcolor="#CCCCCC">
<td width="9"> </td>
<td class="downBorder"> </td>
<td class="downBorder"><input name="insert" type="button" id="insert" onClick="post('insert');return false;" value="Evenement toevoegen"></td>
</tr>
<tr bgcolor="#CCCCCC">
<td width="9"> </td>
<td>
               <input name="action" type="hidden" class="" id="action" value="">
<% while(rsEvents.next()){ %>
               <input name="ID" type="hidden" class="" id="ID" value="<%=rsEvents.getString("ID")%>">
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               %>
               </td>
<td> </td>
</tr>
</table>
</form></td>
</tr>
</table>
</body>
</html>
<%
rsEvents.close();
StatementrsEvents.close();
ConnrsEvents.close();
%></a>

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How to Insert more than one record at a time

How to insert multiple records at a time?
If someone can advise on this, then the actual problem is described below:
I have a MS access database with one table. The table has three fields. The
first field is an autonumber field for ID number.
The second field contains string values- One out of 7 predefined values. One
set of records consists of 7 records containing all the seven types of
predefined values in fields no 1.
The third field is a numeric field and can contain integers.
I want that the user can enter data for the table using an ASP form in such
a way that he enters one set of records at a time in one single screen. This
way he will not have to remember that he has /has not entered all the seven
set of values for the field no 1.
I am not creating fields with the 7 types of field1value as their names as
it will increase the number of fields drastically.
Please help with inserting multiple records at a time.

I have successfully inserted seven records in one form submit operation by looping through the command object execute method.
However, the data that is being inserted by the command object is repetition of the first record and the command object is not taking any data from the text boxes for the second record onwards. In this I had used the isert record behavious generated by DW CS4 and modified it to suit my requirement. However, the data inserted in the first row is getting repeated in all the seven rows.
Please help.
Also advise if there are any free dreamweaver server side validation extensions available.

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