Trying to change the text of the command button.

Question

Hi.,
Am using jdeveloper 11.1.1.6.,
I have dragged and dropped a command button in my jsff page.
When there is no record in my VO which dragged and dropped as a af:form the button will act as a create insert so that the text of the button should also be create Insert. If there is record the button should act as a update so that the text should also be update. I have used the follwoing code to change the text accordingly.
    public void settext(ActionEvent actionEvent) {
        // Add event code here...
        BindingContainer bc = getBindings();
        DCIteratorBinding dcIter =
            (DCIteratorBinding)bc.get("EssEeoDemInfView1Iterator");
        int e = (int)dcIter.getEstimatedRowCount();
        System.out.println (e);
        if ((e == 0)) {
            myButton.setText("CreateInsert");    // Null pointer exception occurs
        } else {
            myButton.setText("Update");  //null pointer exception occurs
    }Can any one pls help me?

Answer 1

Hi Timo!
This was the thing which i have did.
I have dragged and dropped a command button to my jsff page.
When i press the button a popup will show which ask the confirmation from the user.
This is the code which i have written in my managed bean.
    public String delete_action() {
        BindingContainer bindings = getBindings();
        OperationBinding operationBinding = bindings.getOperationBinding("Delete");
        Object result = operationBinding.execute();
        Commit();
        if (!operationBinding.getErrors().isEmpty()) {
            return null;
        return null;
    public void deleteItem(DialogEvent dialogEvent)
        if (dialogEvent.getOutcome() != DialogEvent.Outcome.yes)
            delete_action();
          return;
      }I have used the EL Expression in my another button which will change it property according to the values in my row.
#{bindings.EssEeoDemInfView1Iterator.estimatedRowCount gt 0 ? 'Update':'Create Insert'}For this button i have used the following code in my managed bean.
    public String update() {
         BindingContainer bc = getBindings();
        DCIteratorBinding dcIter =
            (DCIteratorBinding)bc.get("EssEeoDemInfView1Iterator");
        int e = (int)dcIter.getEstimatedRowCount();
        if ((e == 0)) {
              CreateInsert();
        } else {
               Commit();
        return null;
    }When i initially delete the record the button has not been changed to createinsert it remains as update. When i press the update am getting NULL pointer exception in CreateInsert() and Commit();