C#

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.

C#

bool success = false;

//  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

Chilkat.Csv csv = new Chilkat.Csv();

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

//  Load the CSV records from the file:

success = csv.LoadFile("sample.csv");
if (success != true) {
    Debug.WriteLine(csv.LastErrorText);
    return;
}

//  Change "cheese" to "baguette"
//  ("cheese" is at row=0, column=3
success = csv.SetCell(0,3,"baguette");

//  Change "blue" to "magenta"
success = csv.SetCell(1,1,"magenta");

//  Write the updated CSV to a string and display:
string csvDoc;
csvDoc = csv.SaveToString();
Debug.WriteLine(csvDoc);

//  Save the CSV to a file:
success = csv.SaveFile("out.csv");
if (success != true) {
    Debug.WriteLine(csv.LastErrorText);
}