Code 39 Extended

• Feb 20, 2026
• 2 minutes to read

Code 39 Extended, also known as Full ASCII Code 39, encodes all 128 ASCII characters. The symbology uses the $, /, %, and + symbols as shift characters. Combine a shift character with the following character to encode a Full ASCII value.

View Example

Examples

Configure Barcode Settings (Code39ExtendedOptions)

Use the Code39ExtendedOptions class to configure code 39 extended barcode settings.

The following code snippet creates an Code 39 Extended barcode and customizes its options:

C#

using DevExpress.Docs.Barcode;
using DevExpress.Drawing;
using System.Drawing;

var code39ExtOptions = new Code39ExtendedOptions();
code39ExtOptions.ShowText = true;
code39ExtOptions.Padding = new Padding(5);
code39ExtOptions.BorderWidth = 1;
code39ExtOptions.WideNarrowRatio = 3.0f;
code39ExtOptions.CalculateChecksum = true;

using var code39ExtOptionsStream = new FileStream(Path.Combine(outDir, "barcode_symbology_code39_extended.png"), FileMode.Create, FileAccess.Write);
using var code39ExtOptionsGenerator = new BarcodeGenerator(code39ExtOptions);

code39ExtOptionsGenerator.Export("Code39 ext: !@#$%", code39ExtOptionsStream, DXImageFormat.Png);

VB.NET

Imports DevExpress.Docs.Barcode
Imports DevExpress.Drawing
Imports System.Drawing

Dim code39ExtOptions As New Code39ExtendedOptions()
code39ExtOptions.ShowText = True
code39ExtOptions.Padding = New Padding(5)
code39ExtOptions.BorderWidth = 1
code39ExtOptions.WideNarrowRatio = 3.0F
code39ExtOptions.CalculateChecksum = True

Using code39ExtOptionsStream As New FileStream(Path.Combine(outDir, "barcode_symbology_code39_extended.png"), FileMode.Create, FileAccess.Write)
  Using code39ExtOptionsGenerator As New BarcodeGenerator(code39ExtOptions)
    code39ExtOptionsGenerator.Export("Code39 ext: !@#$%", code39ExtOptionsStream, DXImageFormat.Png)
  End Using
End Using

Configure Barcode Settings (Fluent API)

Use the Code39ExtendedOptionsBuilder class to configure code 39 extended barcode settings with Fluent API.

The following code snippet creates an Code 39 Extended barcode and customizes its options:

C#

using DevExpress.Docs.Barcode;
using DevExpress.Drawing;
using System.Drawing;

var code39ExtOptions = code39ExtOptionsBuilder.Create()
    .WithShowText(true)
    .WithPadding(5)
    .WithBorderWidth(1)
    .WithWideNarrowRatio(3.0f)
    .WithCalculateChecksum(true)
    .Build();

using var code39ExtOptionsStream = new FileStream(Path.Combine(outDir, "barcode_symbology_code39_extended.png"), FileMode.Create, FileAccess.Write);
using var code39ExtOptionsGenerator = new BarcodeGenerator(code39ExtOptions);

code39ExtOptionsGenerator.Export("Code39 ext: !@#$%", code39ExtOptionsStream, DXImageFormat.Png);

VB.NET

Imports DevExpress.Docs.Barcode
Imports DevExpress.Drawing
Imports System.Drawing

Dim code39ExtOptions = code39ExtOptionsBuilder.Create() _
    .WithShowText(True) _
    .WithPadding(5) _
    .WithBorderWidth(1) _
    .WithWideNarrowRatio(3.0f) _
    .WithCalculateChecksum(True) _
    .Build()

Using code39ExtOptionsStream = New FileStream(Path.Combine(outDir, "barcode_symbology_code39_extended.png"), FileMode.Create, FileAccess.Write)
  Using code39ExtOptionsGenerator = New BarcodeGenerator(code39ExtOptions)
    code39ExtOptionsGenerator.Export("Code39 ext: !@#$%", code39ExtOptionsStream, DXImageFormat.Png)
  End Using
End Using

Symbology-Specific Options

Property	Description
CalculateChecksum	Gets or sets whether to calculate and add a check character to barcode data.
WideNarrowRatio	Gets or sets the wide bar to a narrow bar ratio.