How to enable/disable the input fields based on the data entered/user action in the web dynpro abap?

How to enable/disable the input fields based on the data entered in the web dynpro application abap? If the user enters data in one input field then only the next input field should be enabled else it should be in disabled state. Please guide.

Hi,
Try this code.
First create a attribute with the name readonly of type wdy_boolean and bind it read_only property of input field of which is you want to enable or disable.
Next go to Init method.
Set the readonly value as 'X'.
DATA lo_el_context TYPE REF TO if_wd_context_element.
     DATA ls_context TYPE wd_this->element_context.
     DATA lv_visible TYPE wd_this->element_context-visible.
*   get element via lead selection
     lo_el_context = wd_context->get_element( ).
*   @TODO handle not set lead selection
     IF lo_el_context IS INITIAL.
     ENDIF.
*   @TODO fill attribute
*   lv_visible = 1.
*   set single attribute
     lo_el_context->set_attribute(
       name = `READONLY`
       value = 'X').
After that Go to the Action ENTER.
First read the input field ( first input field, which is value entered field) , next give a condition
if input value is not initial then set the readonly value is ' '.
DATA lo_nd_input TYPE REF TO if_wd_context_node.
     DATA lo_el_input TYPE REF TO if_wd_context_element.
     DATA ls_input TYPE wd_this->element_input.
     DATA lv_vbeln TYPE wd_this->element_input-vbeln.
*   navigate from <CONTEXT> to <INPUT> via lead selection
     lo_nd_input = wd_context->get_child_node( name = wd_this->wdctx_input ).
*   @TODO handle non existant child
*   IF lo_nd_input IS INITIAL.
*   ENDIF.
*   get element via lead selection
     lo_el_input = lo_nd_input->get_element( ).
*   @TODO handle not set lead selection
     IF lo_el_input IS INITIAL.
     ENDIF.
*   get single attribute
     lo_el_input->get_attribute(
       EXPORTING
         name = `VBELN`
       IMPORTING
         value = lv_vbeln ).
if lv_vbeln IS not INITIAL.
    DATA lo_el_context TYPE REF TO if_wd_context_element.
    DATA ls_context TYPE wd_this->element_context.
    DATA lv_visible TYPE wd_this->element_context-visible.
* get element via lead selection
    lo_el_context = wd_context->get_element( ).
* @TODO handle not set lead selection
    IF lo_el_context IS INITIAL.
    ENDIF.
* @TODO fill attribute
* lv_visible = 1.
* set single attribute
    lo_el_context->set_attribute(
      name = `READONLY`
      value = ' ' ).

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Thanks and Regards,
Sarbjeet singh

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How to enable/disable the input fields based on the data entered/user action in the web dynpro abap?

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