B4X

Update CSV File

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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.

B4X

Dim success As Boolean = 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

Dim csv As ChilkatCsv
csv.Initialize

'  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 Then
    Log(csv.LastErrorText)
    Return
End If


'  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:
Dim csvDoc As String
csvDoc = csv.SaveToString
Log(csvDoc)

'  Save the CSV to a file:
success = csv.SaveFile("out.csv")
If success <> True Then
    Log(csv.LastErrorText)
End If