Objective-C

CSV Special Chars - Comma, Double-Quotes

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The Chilkat CSV class/component automatically handles special characters which include double-quotes, and the delimiter character (comma or semicolon).

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.

Objective-C

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

BOOL success = NO;

// 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:

success = [csv LoadFile: @"sample.csv"];
if (success != YES) {
    NSLog(@"%@",csv.LastErrorText);
    return;
}

// A field may contain the delimiter character (in this case
// the delimiter is a comma):
// Change "cheese" to "cheese,baguette"
// ("cheese" is at row=0, column=3
success = [csv SetCell: [NSNumber numberWithInt: 0] col: [NSNumber numberWithInt: 3] content: @"cheese,baguette"];

// A field may also contain double-quotes:
// Change blue to shiny "metallic" blue
success = [csv SetCell: [NSNumber numberWithInt: 1] col: [NSNumber numberWithInt: 1] content: @"shiny \"metallic\" blue"];

// 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);
}

// The out.csv contains this:
// year,color,country,food
// 2001,red,France,"cheese,baguette"
// 2005,"shiny ""metallic"" blue","United States",hamburger
// 2008,green,Italy,pasta
// 1998,orange,Japan,sush