Cancel Button - Clear Input Values

Question

Hello,
I have an input form and user can click the cancel button. When user returns later, I want emty input fields.
But my code, does not work:
public String cancelDugme_action() {
       DCBindingContainer dcBindings = (DCBindingContainer)getBindings();
       AttributeBinding id = (AttributeBinding)dcBindings.getControlBinding("idKorisnika");
       id.setInputValue(null);
       return "nazad";
}I get null pointer exception...
Why?
Thanx
Vanja

Answer 1

Hi,
Please find the explanation for the immediate property for a button found in the IDE Help section.
If this property is selected, when the user activates the button, the code in the page bean is executed before the validation, updating of model values, and so on. Essentially, code execution happens right away on the server, which then returns the page.
The most common example of an immediate action is a Cancel button. You make it immediate so that the normal validation and update steps can be skipped, but the action handler can still do whatever is necessary. Typically, the action handler will navigate back to some previous page. In some designs the action handler might also enqueue an informational message like "Transaction cancelled". It is possible to do more: for example, an application might record the fact that the user got partially through a form and then cancelled it.
Setting immediate property to false for the submit button makes the application behave as one could expect.On reading this it appears that the immediate property on the Submit button was set to true along with the Cancel button. Please ensure that the immediate property is only set when the code in the page bean is to be executed bypassing the normal cycle.
Hope this helps
Cheers
Giri