Code 128

Code 128 is a high-density barcode symbology, used extensively worldwide in shipping and packaging industries.

It is especially efficient when encoding sequential numbers since they are merged into a single output character width.

Screenshot

A sample of this symbology

Symbology Characteristics

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

Item	Details
Implementation Class	Code128Symbology
Base Class	LinearBarCodeSymbology
Related `ValidationRule` Class	Code128ValidationRule
Encodable Characters	All lower 128 ASCII characters.
Supports Checksum	Yes. This symbology implementation auto-calculates and inserts a check character.
Has Special Start/Stop Characters	No.
Fixed Length Requirements	No. The symbology value may be any number of characters.

This symbology has these important members:

Member	Description
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.
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`.

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

<barCode:BarCode>
	<barCode:Code128Symbology Value="ABC-123" />
</barCode:BarCode>