Update record problem

Question

drmwv 8; ASP.NET; access 2003
I want to make a record-update page with the wizard.
With just 1 record showing on the page, update is working.
If I add a repeated region and a navigation bar, I get this
errors:
System.Data.OleDb.OleDbException: Field 'gegevens.voornaam'
cannot be a zero-length string.
at
System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(tagDBPARAMS
dbParams, Object& executeResult)
at
System.Data.OleDb.OleDbCommand.ExecuteCommandText(Object&
executeResult)
at
System.Data.OleDb.OleDbCommand.ExecuteCommand(CommandBehavior
behavior, Object& executeResult)
at
System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior
behavior, String method)
at System.Data.OleDb.OleDbCommand.ExecuteNonQuery()
at DreamweaverCtrls.DataSet.DoInit()
When I put all fiels "allow zero length YES", every time I
update a record, the record shows up complete empty...

Answer 1

Your problem is a NullPointerException.
Use Blocks of try...catch in your code to find the line with problems.
Example:
<%
try {
String username = (String)session.getAttribute("username"); // get the session variable value
String oldPassword = request.getParameter("oldPassword");
String newPassword = request.getParameter("newPassword");
String confirmPassword = request.getParameter("confirmPassword");
catch(Exception e) { out.println("The NullPointerException is here!"); }
%>
A greeting.