get_attribute- Input a excel file

Hi,

I am facing an issue. I am tring to input a excel file through attribute, but when i input an excel file as exporting parameter, i am not able to see the correct data in the importing parameter(l_xstring).

What type should be specified for the export parameter.

wd_context->get_attribute( EXPORTING name = `INPUT_FILE`

IMPORTING value = l_xstring ).

Thanks