Convert internal table to excel format

Question

I have used GUI_DOWNLOAD function module to download an internal table to excel format.
Download the excel file.
CALL FUNCTION 'GUI_DOWNLOAD'
     EXPORTING
          filename                  =  filename
          filetype                    = 'ASC'
          write_field_separator = 'X'
     TABLES
          data_tab                   = <tab>
     EXCEPTIONS
         file_write_error             = 1
         no_batch                    = 2
         gui_refuse_filetransfer  = 3
         invalid_type                 = 4
         no_authority                = 5
         unknown_error             = 6
         header_not_allowed     = 7
         separator_not_allowed = 8
         filesize_not_allowed    = 9
         header_too_long         = 10
         dp_error_create          = 11
         dp_error_send            = 12
         dp_error_write            = 13
         unknown_dp_error      = 14
         access_denied          = 15
         dp_out_of_memory    = 16
         disk_full                    = 17
         dp_timeout               = 18
         file_not_found           = 19
         dataprovider_exception = 20
         control_flush_error    = 21
         OTHERS                 = 22.
And I am able to successfully download the excel file but the problem occurs when I try to open the file.
System throws the warning "The file you are trying to open, '[filename]', is in a different format than specified by the file extension. Verify that the file is not corrupted and is from a trusted source before opening the file. Do you want to open the file now?"
And if I click yes, it correctly displays the excel file.
I want to get rid of this warning. Is there any way I can code so that this warning does not occur. Kindly advise.

Answer 1

Hi,
Try Like This
data:begin of it occurs 0,
      grp type c,
      val type i,
     end of it.
data:begin of heading occurs 0,
      TEXT(10) type c,
     end of heading.
    it-grp = 'A'.
    it-val = 100.
    append it.
    it-grp = 'B'.
    it-val = 200.
    append it.
     heading-text = 'GROUP'.
     append heading.
     heading-text = 'VALUE'.
     append heading.
     call function 'GUI_DOWNLOAD'
       exporting
         filename                        = 'C:\text.xls'
         FILETYPE                        = 'DAT'
         WRITE_FIELD_SEPARATOR           = '#'
         SHOW_TRANSFER_STATUS            = 'X'
       tables
        data_tab                        = it[]
        FIELDNAMES                      = heading[]
      EXCEPTIONS
        FILE_WRITE_ERROR                = 1
        NO_BATCH                        = 2
        GUI_REFUSE_FILETRANSFER         = 3
        INVALID_TYPE                    = 4
        NO_AUTHORITY                    = 5
        UNKNOWN_ERROR                   = 6
        HEADER_NOT_ALLOWED              = 7
        SEPARATOR_NOT_ALLOWED           = 8
        FILESIZE_NOT_ALLOWED            = 9
        HEADER_TOO_LONG                 = 10
        DP_ERROR_CREATE                 = 11
        DP_ERROR_SEND                   = 12
        DP_ERROR_WRITE                  = 13
        UNKNOWN_DP_ERROR                = 14
        ACCESS_DENIED                   = 15
        DP_OUT_OF_MEMORY                = 16
        DISK_FULL                       = 17
        DP_TIMEOUT                      = 18
        FILE_NOT_FOUND                  = 19
        DATAPROVIDER_EXCEPTION          = 20
        CONTROL_FLUSH_ERROR             = 21
        OTHERS                          = 22
     if sy-subrc <> 0.
         MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
         WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
     endif.