(C# UWP/WinRT) 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.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

// 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:
bool success;
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);
}