(Objective-C) Update CSV File

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.

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#import <CkoCsv.h>
#import <NSString.h>

// 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

CkoCsv *csv = [[CkoCsv alloc] init];

// Prior to loading the CSV file, indicate that the 1st row
// should be treated as column names:
csv.HasColumnNames = YES;

// Load the CSV records from the file:
BOOL success;
success = [csv LoadFile: @"sample.csv"];
if (success != YES) {
    NSLog(@"%@",csv.LastErrorText);
    return;
}

// Change "cheese" to "baguette"
// ("cheese" is at row=0, column=3
success = [csv SetCell: [NSNumber numberWithInt: 0] col: [NSNumber numberWithInt: 3] content: @"baguette"];

// Change "blue" to "magenta"
success = [csv SetCell: [NSNumber numberWithInt: 1] col: [NSNumber numberWithInt: 1] content: @"magenta"];

// Write the updated CSV to a string and display:
NSString *csvDoc = 0;
csvDoc = [csv SaveToString];
NSLog(@"%@",csvDoc);

// Save the CSV to a file:
success = [csv SaveFile: @"out.csv"];
if (success != YES) {
    NSLog(@"%@",csv.LastErrorText);
}