(Delphi DLL) 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 for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Csv;

...

procedure TForm1.Button1Click(Sender: TObject);
var
csv: HCkCsv;
success: Boolean;
csvDoc: PWideChar;

begin
// 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

csv := CkCsv_Create();

// Prior to loading the CSV file, indicate that the 1st row
// should be treated as column names:
CkCsv_putHasColumnNames(csv,True);

// Load the CSV records from the file:

success := CkCsv_LoadFile(csv,'sample.csv');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkCsv__lastErrorText(csv));
    Exit;
  end;

// Change "cheese" to "baguette"
// ("cheese" is at row=0, column=3
success := CkCsv_SetCell(csv,0,3,'baguette');

// Change "blue" to "magenta"
success := CkCsv_SetCell(csv,1,1,'magenta');

// Write the updated CSV to a string and display:

csvDoc := CkCsv__saveToString(csv);
Memo1.Lines.Add(csvDoc);

// Save the CSV to a file:
success := CkCsv_SaveFile(csv,'out.csv');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkCsv__lastErrorText(csv));
  end;

CkCsv_Dispose(csv);

end;