InvalidOperationException

Question

hi, I have a jsp page that selects all the records from a table, presents them in a table and has a radio button beside each one. The user can choose a record to update. The radio button has the value of the primary key(EMPLOYEE_NO). This value is passed to another jsp page where it finds that record, and displays it's values in textboxes so they can be altered and udated in the next page. I am having problems with selecting the record and displaying it in the textboxes. Here is my error:
javax.servlet.ServletException: [interclient] Invalid operation to read at current cursor position.
See API reference for exception interbase.interclient.InvalidOperationException
     at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:457)
     at org.apache.jsp.UpdateB$jsp._jspService(UpdateB$jsp.java:138)........
here is my JSP code:
     String update = request.getParameter("update");
     System.out.println(update);
     Class.forName("interbase.interclient.Driver");
     Connection con=DriverManager.getConnection("jdbc:interbase://diarmuid/c:/Employees.gdb","SYSDBA","masterkey");
     String sql="SELECT * FROM EMPOYEES WHERE EMPLOYEE_NO ='"+update+"' ";
     Statement stmt = con.createStatement();
     rs = stmt.executeQuery(sql);
%>
<table><tr><FORM METHOD="POST" ACTION="UpdateC.jsp">
<td width="22" bgcolor="#A52A2A"><font color="#000000" size="2" face="Arial"><b>EMPLOYEE_NO</b></font></td>
<td><%=rs.getString("EMPLOYEE_NO")%> </td>
</tr>
<tr>
<td bgcolor="#A52A2A" align="center" width="87"><font color="#000000" size="2"><b>FIRST_NAME</b></font></td>
<td><input type="text" name="FIRST_NAME" value="<%=rs.getString("FIRST_NAME")%>"></td>
</tr>
<tr>
<td bgcolor="#A52A2A" align="center" width="87"><font color="#000000" size="2"><b>LAST_NAME</b></font></td>
<td><input type="text" name="LAST_NAME" value="<%=rs.getString("LAST_NAME")%>"></td>
</tr>
<tr>
<td bgcolor="#A52A2A" align="center" width="87"><font color="#000000" size="2"><b>ADDRESS</b></font></td>
<td><input type="text" name="ADDRESS" value="<%=rs.getString("ADDRESS")%>"></td>
</tr>
<tr>
<td bgcolor="#A52A2A" align="center" width="87"><font color="#000000" size="2"><b>PHONE</b></font></td>
<td><input type="text" name="PHONE" value="<%=rs.getString("PHONE")%>"></td>
</tr>
<tr>
<td bgcolor="#A52A2A" align="center" width="87"><font color="#000000" size="2"><b>SEX</b></font></td>
<td><input type="text" name="SEX" value="<%=rs.getString("SEX")%>"></td>
</tr>
<tr>
<td bgcolor="#A52A2A" align="center" width="87"><font color="#000000" size="2"><b>DOB</b></font></td>
<td><input type="text" name="DOB" value="<%=rs.getString("DOB")%>"></td>
</tr>
<td colspan="2" align="center"><input type="submit" value="Update"></td></form>
</tr></table>
<input type="button" value="Print" onClick="window.print()"><br>
Exit</td></tr></table>
</html>
</body>
Any help is much appreciated, thank you in advance

Answer 1

You know, I should really just not post anything before my morning caffeine.rs = stmt.executeQuery(sql);
%>
<table><tr><FORM METHOD="POST" ACTION="UpdateC.jsp">
<td width="22" bgcolor="#A52A2A"><font color="#000000" size="2" face="Arial"><b>EMPLOYEE_NO</b></font></td>
<td><%=rs.getString("EMPLOYEE_NO")%> </td>Between the execution of the query and the first getString() there is no call to next(); the cursor is in BeforeFirst position and has nothing to read.rs = stmt.executeQuery(sql);
//ADD THESE LINES
if (!rs.next()){
   //do some error condition
%>
<table><tr><FORM METHOD="POST" ACTION="UpdateC.jsp">
<td width="22" bgcolor="#A52A2A"><font color="#000000" size="2" face="Arial"><b>EMPLOYEE_NO</b></font></td>
<td><%=rs.getString("EMPLOYEE_NO")%> </td>Sorry about that! =\