Can't delete row

Question

Hi,
i am trying to implement page 664 of dev guide which is delete row of table.
My page shows the data of one row.
I added a delete submitbutton to my page.
Here is my code :
int idi = Integer.parseInt(id.toString());
XxVOImpl vo = getXxVO1();
XxVORowImpl row = null;
int fetchedRowCount = vo.getFetchedRowCount();
boolean rowFound = false;
RowSetIterator deleteIter = vo.createRowSetIterator("deleteIter");
if (fetchedRowCount > 0)
deleteIter.setRangeStart(0);
deleteIter.setRangeSize(fetchedRowCount);
for (int i = 0; i < fetchedRowCount; i++)
row = (XxVORowImpl)deleteIter.getRowAtRangeIndex(i);
oracle.jbo.domain.Number primaryKey = row.getId();
if (primaryKey.compareTo(idi) == 0)
row.remove();
rowFound = true;
getTransaction().commit();
break;
deleteIter.closeRowSetIterator();
my problem is that fetchedRowCount is 0. But there are about 100 rows in my table.
And my VO is just a simple select * from mytable.
So i do not understand why fetchedRowCount is still 0 ?
Help thanks
Dan

Answer 1

Dan
You need to create a dialog page with yes no button when you click on delete icon. Please refer dev guide for dialog page or you ma refer below code snippet that you may need to change little bit
   else if ("delete".equals(pageContext.getParameter(EVENT_PARAM)))
// The user has clicked a "Delete" icon so we want to display a "Warning"
// dialog asking if she really wants to delete the employee. Note that we
// configure the dialog so that pressing the "Yes" button submits to
// this page so we can handle the action in this processFormRequest( ) method.
String employeeNumber = pageContext.getParameter("empNum");
String employeeName = pageContext.getParameter("empName");
MessageToken[] tokens = { new MessageToken("EMP_NAME", employeeName)};
OAException mainMessage = new OAException("AK",
"FWK_TBX_T_EMP_DELETE_WARN", tokens);
// Note that even though we're going to make our Yes/No buttons submit a
// form, we still need some non-null value in the constructor's Yes/No
// URL parameters for the buttons to render, so we just pass empty
// Strings for this.
OADialogPage dialogPage = new OADialogPage(OAException.WARNING,
mainMessage, null, "", "");
// Always use Message Dictionary for any Strings you want to display.
String yes = pageContext.getMessage("AK", "FWK_TBX_T_YES", null);
String no = pageContext.getMessage("AK", "FWK_TBX_T_NO", null);
// We set this value so the code that handles this button press is
// descriptive.
dialogPage.setOkButtonItemName("DeleteYesButton");
// The following configures the Yes/No buttons to be submit buttons,
// and makes sure that we handle the form submit in the originating
// page (the "Employee" summary) so we can handle the "Yes"
// button selection in this controller.
dialogPage.setOkButtonToPost(true);
dialogPage.setNoButtonToPost(true);
dialogPage.setPostToCallingPage(true);
// Now set our Yes/No labels instead of the default OK/Cancel.
dialogPage.setOkButtonLabel(yes);
dialogPage.setNoButtonLabel(no);
// We need to keep hold of the employeeNumber, and the OADialogPage gives us a
// convenient means of doing this. Note that the use of the Hashtable is
// really more appropriate for passing multiple parameters, but we've used
// it here for illustration purposes. See the OADialogPage javadoc for an
// alternative when dealing with a single parameter.
java.util.Hashtable formParams = new java.util.Hashtable(1);
formParams.put("empNum", employeeNumber);
formParams.put("empName", employeeName);
dialogPage.setFormParameters(formParams);
pageContext.redirectToDialogPage(dialogPage);
else if (pageContext.getParameter("DeleteYesButton") != null)
// User has confirmed that she wants to delete this employee.
// Invoke a method on the AM to set the current row in the VO and
// call remove() on this row.
String employeeNumber = pageContext.getParameter("empNum");
String employeeName = pageContext.getParameter("empName");
Serializable[] parameters = { employeeNumber };
OAApplicationModule am = pageContext.getApplicationModule(webBean);
am.invokeMethod("deleteEmployee", parameters);
// Now, redisplay the page with a confirmation message at the top. Note
// that the deleteEmployee() method in the AM commits, and our code
// won't get this far if any exceptions are thrown.
MessageToken[] tokens = { new MessageToken("EMP_NAME", employeeName) };
OAException message = new OAException("AK",
"FWK_TBX_T_EMP_DELETE_CONFIRM", tokens, OAException.CONFIRMATION, null);
pageContext.putDialogMessage(message);
}Thanks
AJ