How can I modify an existing Excel workbook with Perl?

Question

With Spreadsheet::WriteExcel, I can create a new workbook, but what if I want to open an existing book and modify certain columns? How would I accomplish that?

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Answer 1

Spreadsheet::ParseExcel will read in existing excel files:

my $parser   = Spreadsheet::ParseExcel->new();
# $workbook is a Spreadsheet::ParseExcel::Workbook object
my $workbook = $parser->Parse('Book1.xls');

But what you really want is Spreadsheet::ParseExcel::SaveParser, which is a combination of Spreadsheet::ParseExcel and Spreadsheet::WriteExcel. There is an example near the bottom of the documentation.