Code39Symbology Class

public class Code39Symbology : LinearBarcodeSymbologyBase

Inheritance:

object ObservableObjectBase BarcodeSymbologyBase LinearBarcodeSymbologyBase object

Derived:

Code39ExtendedSymbology

Remarks

This symbology is also known as Alpha39, Code 39 mod 43, Code 3 of 9, Code 3/9, USD-3, and USS Code 39.

Code 39 is a linear symbology, and is one of the first alphanumeric barcodes. Each character encoded is made up of 5 bars and 4 spaces for a total of 9 elements. 3 out of the 9 element are always wide. Although it is not as dense of a symbology such as Code 128, it is one of the most widely supported symbologies by devices.

This symbology can encode numbers, uppercase letters, and -$% ./+ characters.

Each encoded value must start and stop with *, which is automatically inserted. The AreStartStopCharactersVisible property determines whether these start/stop characters are included in the displayed value.

This symbology is self-checking, so no checksum or check digit is required. However if the IsChecksumEnabled property is true, the symbology's implementation auto-calculates and inserts a check digit. This is referred to as Code 39 mod 43.

An extended implementation of Code 39 is available in Code39ExtendedSymbology. That implementation allows for all lower 128 ASCII characters to be encoded based on the core Code 39 concepts.

Constructors

Code39Symbology()

public Code39Symbology()

Properties

AreStartStopCharactersVisible

public bool AreStartStopCharactersVisible { get; set; }

ExampleValue

public override string ExampleValue { get; }

IsChecksumEnabled

public bool IsChecksumEnabled { get; set; }

Name

public override string Name { get; }

WideToNarrowRatio

public double WideToNarrowRatio { get; set; }

Methods

CreateRenderData(BarcodeEncodingRequest)

public override BarcodeRenderData CreateRenderData(BarcodeEncodingRequest request)

GetModulesWidth(int)

protected override double GetModulesWidth(int moduleCount)

PreprocessCharacter(char)

protected virtual string PreprocessCharacter(char ch)

Validate(string)

public override BarcodeValidationResult Validate(string value)

Inherited Members

• LinearBarcodeSymbologyBase.GetMargin()
• LinearBarcodeSymbologyBase.BarHeight
• LinearBarcodeSymbologyBase.MinHeightToWidthRatio
• LinearBarcodeSymbologyBase.QuietZoneThickness
• LinearBarcodeSymbologyBase.ValueAlignment
• BarcodeSymbologyBase.CreateRenderDataAsync(BarcodeEncodingRequest, CancellationToken)
• ObservableObjectBase.OnPropertyChanged(string)
• ObservableObjectBase.OnPropertyChanged(PropertyChangedEventArgs)
• ObservableObjectBase.OnPropertyChanging(string)
• ObservableObjectBase.OnPropertyChanging(PropertyChangingEventArgs)
• ObservableObjectBase.SetProperty<T>(ref T, T, string)
• ObservableObjectBase.PropertyChanged
• ObservableObjectBase.PropertyChanging
• object.GetType()
• object.MemberwiseClone()
• object.ToString()
• object.Equals(object)
• object.Equals(object, object)
• object.ReferenceEquals(object, object)
• object.GetHashCode()

Extension Methods

• ObjectExtensions.TryConvertToDouble(object, out double)
• ObjectExtensions.TryConvertToDouble(object, IFormatProvider, out double)