First create a node of the same structure as the .CSV file and then bind it to a table in the layout and use the following coding in the On Action method of the Upload button that you have created.
begin of wa, " structure of the node/file
mandt type mandt,
matnr type matnr,
end of wa,
itab like table of wa,
rows type standard table of string , " will hold the entire contents
wa_rows(300) type c .
DATA lo_el_context TYPE REF TO if_wd_context_element.
DATA ls_context TYPE wd_this->element_context.
DATA lv_contents LIKE ls_context-contents.
* get element via lead selection
lo_el_context = wd_context->get_element( ).
* get single attribute
lo_el_context->get_attribute(
EXPORTING
name = `CONTENTS`
IMPORTING
value = lv_contents ).
DATA : loc_conv TYPE REF TO cl_abap_conv_in_ce,
var_string TYPE string, " holds the string value of the file
inst type ref to CL_SWF_UTL_CONVERT_XSTRING,
inst1 type ref to cl_abap_conv_in_ce.
CALL METHOD cl_abap_conv_in_ce=>create
EXPORTING
input = lv_contents
encoding = 'UTF-8'
replacement = '?'
ignore_cerr = abap_true
RECEIVING
conv = loc_conv.
CALL METHOD loc_conv->read
IMPORTING
data = var_string.
SPLIT var_string AT CL_ABAP_CHAR_UTILITIES=>CR_LF INTO TABLE ROWS.
LOOP AT ROWS INTO WA_ROWS .
split wa_rows at ',' into wa-mandt wa-matnr.
append wa to itab.
ENDLOOP.
DATA lo_nd_table TYPE REF TO if_wd_context_node.
DATA lo_el_table TYPE REF TO if_wd_context_element.
DATA ls_table TYPE wd_this->element_table.
* navigate from
