Coul anyone help me with a sql query that involves a jcombobox?

Question

HI all
i'm writing this program in wich i want to query a table in a ms access db. My os is win2000 and i use access2000.
so i have a list of categories in a jcombobox.When one of the categories is selected i have to display the corresponding product for that category in a jtext area.
I wrote the code.But i keep getting an erro at run time when i selct an item from the combobox wich is :
SQL Error: java.sql.SQLException: [Microsoft][ODBC Microsoft Access Driver]Invalid descriptor index 20 S1002
here's my code:
boxcategories.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JComboBox cb = (JComboBox)e.getSource();
String mySelection = (String)cb.getSelectedItem();
//connecting to the data base
Connection connec;
String data = "jdbc:odbc:MyDB";
try {  
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
connec = DriverManager.getConnection(
data , "", "");
PreparedStatement ps = connec.prepareStatement(" SELECT Category from products"+
" WHERE Category =?");
ps.setString(1,mySelection );
ResultSet rs = ps.executeQuery();
if (rs.next() )      {
products.append(rs.getString(1)+"\t"+
rs.getString(2)+"\t\t"+
"$" rs.getString(4) "\t ");
} catch (SQLException s) {
System.out.println("SQL Error: " + s.toString() + " "
+ s.getErrorCode() + " " + s.getSQLState());
} catch (Exception x) {
System.out.println("Error: " + x.toString()
+ x.getMessage());
so what do u think i should do
Franck

Answer 1

hi
i'm having a problem with this query.When i select a categoryfrom
the combobox,i only get one corresponding product displayed in the jtextarea
I tryed everythin but i cant get this code to work correctly.
i want that when i select a category from the combobox that the corresponding product of wich the in stock quantity is >20 to be displayed
in one jtext area and thos who's in stock quantity is < in another jtext area
What should i do?
here's my code
boxcategories.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JComboBox cb = (JComboBox)e.getSource();
String mySelection = (String)cb.getSelectedItem();
//connecting to the data base
Connection connec;
String data = "jdbc:odbc:MyDB";
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
connec = DriverManager.getConnection(
data , "", "");
PreparedStatement ps = connec.prepareStatement(" SELECT Category from products"+
" WHERE Category =?");
ps.setString(1,mySelection );
ResultSet rs = ps.executeQuery();
if (rs.next() ) {
products.setText((rs.getInt(1)+"\t"+
rs.getString(2)+"\t\t"+
"$" rs.getFloat(4) "\t " rs.getInt(5) "\n" );
if(rs.getInt(5) < 20)
products1.setText(rs.getInt(1)+"\t"+
     rs.getString(2)+"\t\t"+
     "$" rs.getFloat(4) "\t " + rs.getInt(5) +"\n" );
else
produitdescription.setText("");produitdescription1.setText("");
} catch (SQLException s) {
System.out.println("SQL Error: " + s.toString() + " "
+ s.getErrorCode() + " " + s.getSQLState());
} catch (Exception x) {
System.out.println("Error: " + x.toString()
+ x.getMessage());
when i selct a category i get this runtime error at the same time the product is displayed
SQL Error: java.sql.SQLException: No data found 0 null
what should i do
FRanck