How to Display Error Messages

[Former Member]

Hi,

I have a view1 which has select-options. When the user enters some value in the select-options and clicks on the submit button, I want to validate the data entered by the user and if it is wrong, want to give an error message in a popup. To do this,

1) where should I code the validation and the popup with the error message? Is WDDOBEFOREACTION the right event?

2) How can I stop, in case of error, the code of the event handler, ONACTIONGET_DATA to be executed, so that view2 is not displayed along with the popup? I have written the following code in WDDOBEFOREACTION

Select * from vbak into table i_vbak where vbeln in <LT_RANGE_TABLE>.

If sy-subrc NE 0.

l_api_main = wd_this->wd_get_api( ).

l_cmp_api = wd_comp_controller->wd_get_api( ).

• get configuration context

l_node = wd_context->get_child_node( 'POPUP_DATA' ).

l_node_info = l_node->get_node_info( ).

l_attributes = l_node_info->get_attributes( ).

read table l_attributes assigning <attribute> with key name = `BUTTON_KIND`.

if sy-subrc = 0.

loop at <attribute>-value_set assigning <value_set>.

wa_value_set = <value_set>.

condense wa_value_set-key.

insert wa_value_set into table l_value_set.

endloop.

l_node_info->set_attribute_value_set( name = `BUTTON_KIND`

value_set = l_value_set ).

endif.

read table l_attributes assigning <attribute> with key name = `MESSAGE_TYPE`.

if sy-subrc = 0.

clear l_value_set.

loop at <attribute>-value_set assigning <value_set>.

wa_value_set = <value_set>.

condense wa_value_set-key.

insert wa_value_set into table l_value_set.

endloop.

l_node_info->set_attribute_value_set( name = `MESSAGE_TYPE`

value_set = l_value_set ).

endif.

l_node->get_static_attributes( importing static_attributes = l_conf_context ).

split l_conf_context-text at '#' into table l_text_table.

l_window_manager = l_cmp_api->get_window_manager( ).

wd_this->popup = l_window_manager->create_popup_to_confirm(

text = l_text_table

button_kind = l_conf_context-button_kind

message_type = l_conf_context-message_type

close_button = l_conf_context-close_button

window_title = l_conf_context-window_title

window_left_position = l_conf_context-window_left_position

window_top_position = l_conf_context-window_top_position

window_position = l_conf_context-window_position

window_width = l_conf_context-window_width

window_height = l_conf_context-window_height ).

wd_this->popup->set_remove_on_close( abap_true ).

wd_this->popup->open( ).

After the call to the popup->open( ) method, the code goes on to the event handler ONACTIONGET_DATA, executes the code there and dispalys the next view with the pop up.

Thanks,

Mick

[arjun_thakur · Accepted solution]

Hi Mick,

Every time you click on submit buttom, WDDOBEFOREACTION method is called. So wriiting the validation code in this method will not be a problem. Or can can also write the validation code in the ONACTION method of the submit buttom.

To stop the execution in case of an error: You can use a globe flag variable. Assign it some value (say 0). In case of error, just change its value (to say 1).

Now in the ONACTIONSUBMIT method, before you call GET_DATA method, write this line:

Check lv_flag EQ '0'.

this code will stop the execution in the case of error.

I hope it helps

Regards

Arjun

[Former Member]

Hi Mick,

If the submit button is the main view create a method check_input in that do the necessary validations.

refer to the standard webdynpro component:

package : SWDP_DEMO

--> DEMO_MESSAGES check this webdynpro component.

Regards,

Sravanthi

[Former Member]

Hi,

You have to write your code for validation at method which calling under Button event.I mean to say when you click the button the Method which are going to trigger.

-Rick