How to Upload Excel file from PC to SAP Internal table

ABAP code for uploading an Excel document into an internal table. See code below for structures. The code is based on uploading a simple Excel spreadsheet or for an actual Excel file click here. There are also a couple of alternatives which use fucntion modules 'KCD_EXCEL_OLE_TO_INT_CONVERT' and 'ALSM_EXCEL_TO_INTERNAL_TABLE' but the method below is by far the simplest method to used.

Update: Just tried uploading a file which was in the new MS excel format (.xlsx) using the below method but unfortunately it did not work. Using 'ALSM_EXCEL_TO_INTERNAL_TABLE' or 'KCD_EXCEL_OLE_TO_INT_CONVERT' function modules still uploads .xlsx files though.

*..............................................................
*: Description                                                :
*: -----------                                                :
*: This is a simple example program to get data from an excel :
*: file and store it in an internal table.                    :
*:                                                            :
*: Author : www.sapdev.co.uk, based on code from Jayanta      :
*:                                                            :
*: SAP Version : 4.7                                          :
*:............................................................:
REPORT  zupload_excel_to_itab.

TYPE-POOLS: truxs.

PARAMETERS: p_file TYPE  rlgrap-filename.

TYPES: BEGIN OF t_datatab,
      col1(30)    TYPE c,
      col2(30)    TYPE c,
      col3(30)    TYPE c,
      END OF t_datatab.
DATA: it_datatab type standard table of t_datatab,
      wa_datatab type t_datatab.

DATA: it_raw TYPE truxs_t_text_data.

* At selection screen
AT SELECTION-SCREEN ON VALUE-REQUEST FOR p_file.
  CALL FUNCTION 'F4_FILENAME'
    EXPORTING
      field_name = 'P_FILE'
    IMPORTING
      file_name  = p_file.


***********************************************************************
*START-OF-SELECTION.
START-OF-SELECTION.

  CALL FUNCTION 'TEXT_CONVERT_XLS_TO_SAP'
    EXPORTING
*     I_FIELD_SEPERATOR        =
      i_line_header            =  'X'
      i_tab_raw_data           =  it_raw       " WORK TABLE
      i_filename               =  p_file
    TABLES
      i_tab_converted_data     = it_datatab[]    "ACTUAL DATA
   EXCEPTIONS
      conversion_failed        = 1
      OTHERS                   = 2.

  IF sy-subrc <> 0.
    MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
            WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
  ENDIF.


***********************************************************************
* END-OF-SELECTION.
END-OF-SELECTION.
  LOOP AT it_datatab INTO wa_datatab.
    WRITE:/ wa_datatab-col1,
            wa_datatab-col2,
            wa_datatab-col3.
  ENDLOOP.