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Code 39 Extended

Code 39 Extended is a linear symbology, and supports the encoding of many more characters than standard Code 39.

This symbology is also known as Code 39 Full ASCII.

Screenshot

A sample of this symbology

Symbology Characteristics

The following table gives an overview of the characteristics of the symbology.

Item Details
Implementation Class Code39ExtendedSymbology
Base Class Code39Symbology
Related ValidationRule Class Code39ExtendedValidationRule
Encodable Characters All lower 128 ASCII characters.
Supports Checksum Yes. While this symbology is self-checking, the implementation can optionally auto-calculate and insert a check character. This is referred to as Code 39 mod 43.
Has Special Start/Stop Characters Yes. Must start and stop with * characters, but these are automatically appended for you.
Fixed Length Requirements No. The symbology value may be any number of characters.

Important Members

This symbology has these important members:

Member Description
AreStartStopCharactersVisible Property Gets or sets whether the start/stop characters (*) are visible in the displayed value.
Background Property Gets or sets the Brush to use for rendering the background.
BarHeight Property Gets or sets the desired height of the bars.
BarWidthRatio Property Gets or sets the width ratio of wide lines to narrow lines.
DisplayName Property Gets the display name of the symbology.
DisplayValue Property Gets or sets the value that is displayed if ValueDisplayStyle is not None.
Foreground Property Gets or sets the Brush to use for rendering the foreground.
IsChecksumEnabled Property Gets or sets whether the optional checksum should be added.
MeasureDesiredSize Method Measures the desired size of the symbology, based on the specified available size.
MinBarHeightWidthRatio Property Gets or sets the minimum ratio that the height of the bar code must be in relation to its width.
QuietZoneThickness Property Gets or sets the Thickness of the quiet zone.
Render Method Renders the symbology to the specified DrawingContext.
ToBitmap Method Creates a BitmapSource based on the contents of the symbology.
ValidateValue Method Validates that the symbology can parse the specified value.
Value Property Gets or sets the value to encode in the bar code.
ValueDisplayStyle Property Gets or sets a LinearBarCodeValueDisplayStyle that indicates how the value should rendered.
ValueIntrusionOffset Property Gets or sets the distance that the Value text intrudes into the bar code when ValueDisplayStyle is not None.

Sample XAML

This sample XAML code shows how to create a BarCode using this symbology.

<barCode:BarCode>
	<barCode:Code39ExtendedSymbology Value="abc-123" />
</barCode:BarCode>