Lua

Update CSV File

See more CSV Examples

Demonstrates how to read a CSV, update some cells, and save.

The Chilkat CSV library/component/class is freeware. The downloads for .NET, C++, Perl, Java, Ruby, and Python contain all of the Chilkat classes, some of which are freeware and some of which require licensing.

Lua

local chilkat = require("chilkat")

-- This example program loads a file (sample.csv)
-- that contains this content:
--
-- year,color,country,food
-- 2001,red,France,cheese
-- 2005,blue,"United States",hamburger
-- 2008,green,Italy,pasta
-- 1998,orange,Japan,sushi
--
-- The first row contains the column names.
-- This file is available at:
-- http://www.chilkatsoft.com/testData/sample.csv

local csv = chilkat.Csv.new()

-- Prior to loading the CSV file, indicate that the 1st row
-- should be treated as column names:
csv.has_column_names = true

-- Load the CSV records from the file:

local success = csv:load_file("sample.csv")
if not success then
    print(csv.last_error_text)
    return
end

-- Change "cheese" to "baguette"
-- ("cheese" is at row=0, column=3
success = csv:set_cell(0, 3, "baguette")

-- Change "blue" to "magenta"
success = csv:set_cell(1, 1, "magenta")

-- Write the updated CSV to a string and display:
local csvDoc = csv:save_to_string()
print(csvDoc)

-- Save the CSV to a file:
success = csv:save_file("out.csv")
if not success then
    print(csv.last_error_text)
end