ABAP Dynpro - HTML control - access HTML data

[Former Member]

Hi all,

I have a dynpro application with a HTML-control.

I load a web page into the HTML-control.

Is it possible to fill the fields in the web page automatically?

(For example a javascript file will be executed from ABAP and then a value will be filled into a textfield.)

Or how can I fill the fields in the web page?

regards

[bbalci]

Hello,

Yes you can do it with script execution :

CL_GUI_HTML_VIEWER has methods for executing scripts, "set_script" and "execute_script"

but you should use inheritance first because these methods are Protected.

In JavaScript this code used for setting a value in an HTML input :

'document.getElementById('INPUT_FIELD_NAME).value = 'Hello'

As a result of them, Here is my class :

CLASS cl_gui_html_viewer_extend DEFINITION

INHERITING FROM cl_gui_html_viewer.

PUBLIC SECTION.

METHODS:

set_input_value

IMPORTING

ip_input_name TYPE c

ip_value TYPE c.

ENDCLASS.

CLASS cl_gui_html_viewer_extend IMPLEMENTATION.

METHOD set_input_value.

DATA : t_script TYPE TABLE OF char100,

w_script LIKE LINE OF t_script.

CONCATENATE

'document.getElementById(''' ip_input_name ''').value ='

'"' ip_value '"' INTO w_script.

APPEND w_script TO t_script.

CALL METHOD set_script

EXPORTING

script = t_script.

CALL METHOD execute_script.

ENDMETHOD.

ENDCLASS.

Use this class instead of CL_GUI_HTML_VIEWER in your code.

and call method set_input_value to set a value in an HTML input.

I hope it will be useful for u.

[Former Member]

Hi,

is there also a method how to read the values from the HTML page back to the ABAP?

I try it this way but the error is: CL_JAVA_SCRIPT, Rcode: ( 600 ), Error at line 1 : ReferenceError: document is not defined

js_processor = cl_java_script=>create( ).

CONCATENATE

'var string = document.getElementById(''' ip_input_name ''').value;'

INTO source.

CONCATENATE source

'function Set_String() '

' { return (string); '

' } '

'Set_String(); '

INTO source SEPARATED BY cl_abap_char_utilities=>cr_lf.

js_processor->compile( script_name = 'HELLO_WORLD.JS'

script = source ).

return_VALUE = js_processor->execute( 'HELLO_WORLD.JS' ).

regards

[bbalci]

Hello,

The only way to get values from an HTML page is submitting the HTML form

just like user pressed a button on a web page,

Than page sends a navigation string with field - value pairs

field1=value1&field2=value2 .. like all web navigations.

You can parse field values from this string.

CL_GUI_HTML_VIEWER has an event SAPEVENT for that,

you can activate and set a handler for that event

and trigger submit with small JavaScript execution.

I think the example in link below can be helpful for this :

http://abap-explorer.blogspot.com/2008/08/html-through-abap.html

Let me know further problems if you'd have.

[Former Member]

Hi,

can I use this eventing with an existing webpage?

In your example the webpage will be build up in ABAP.

I have a HTML control where I load a webpage and then I want to know which value is specified in a specific field.

regards