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Top Forums Programming how can i read an excel file using C? Post 76882 by mbb on Friday 1st of July 2005 09:20:06 AM
Old 07-01-2005
Bear in mind that the xls file will have number types encoded in a microsoft specific way, which you will need to the detail of. Not to mention a potential endian difference between your hardware platforms which you will also have to take into account.

Do you have control over how the file is saved? If you do, you might be better off requesting the Spreadsheet be saved as a CSV file.

A CSV file would be ASCII, with each column seaparted by a comma and each row on a single line (delimited by a carriage return).

A CSV file would be much easier for you to parse in a C program or scripting language. Although you will have to interpret string representations of numbers into their internal equivalent. e.g. string to integer type, or string to date type.

Don't forget that a text file originating from DOS will have newline and then control-m at the end-of each line. Unix does not require the control-m character, so any text files will have to be pre-processed in UNIX to remove the control-m characters from the end of each line.

Hope this helps

MBB
 

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Spreadsheet::ParseExcel::Simple(3pm)			User Contributed Perl Documentation		      Spreadsheet::ParseExcel::Simple(3pm)

NAME
Spreadsheet::ParseExcel::Simple - A simple interface to Excel data SYNOPSIS
my $xls = Spreadsheet::ParseExcel::Simple->read('spreadsheet.xls'); foreach my $sheet ($xls->sheets) { while ($sheet->has_data) { my @data = $sheet->next_row; } } DESCRIPTION
This provides an abstraction to the Spreadsheet::ParseExcel module for simple reading of values. You simply loop over the sheets, and fetch rows to arrays. For anything more complex, you probably want to use Spreadsheet::ParseExcel directly. BOOK METHODS
read my $xls = Spreadsheet::ParseExcel::Simple->read('spreadsheet.xls'); This opens the spreadsheet specified for you. Returns undef if we cannot read the book. sheets @sheets = $xls->sheets; Each spreadsheet can contain one or more worksheets. This fetches them all back. You can then iterate over them, or jump straight to the one you wish to play with. book my $book = $xls->book; The Spreadsheet::ParseExcel object we are working with. You can use this if you need to manipulate it in ways that this interface doesn't allow. SHEET METHODS
These methods can be called on each sheet returned from $xls->sheets: has_data if ($sheet->has_data) { ... } This lets us know if there are more rows in this sheet that we haven't read yet. This allows us to differentiate between an empty row, and the end of the sheet. next_row my @data = $sheet->next_row; Fetch the next row of data back. sheet my $obj = $sheet->sheet; The underlying Spreadsheet::ParseExcel object for the worksheet. You can use this if you need to manipulate it in ways that this interface doesn't allow (e.g. asking it for the sheet's name). AUTHOR
Tony Bowden BUGS and QUERIES Please direct all correspondence regarding this module to: bug-Spreadsheet-ParseExcel-Simple@rt.cpan.org COPYRIGHT AND LICENSE
Copyright (C) 2001-2005 Tony Bowden. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. SEE ALSO
Spreadsheet::ParseExcel. perl v5.8.8 2008-03-12 Spreadsheet::ParseExcel::Simple(3pm)
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