Where does Code128EncodingSegment live in the IronBarcode API?

Code128EncodingSegment is a class in the IronBarCode namespace, shipped in IronBarCode.dll, with base type Object. Instances arrive in the Segments list of Code128EncodingInfo rather than being constructed directly.

How do you tell which Code 128 character set encoded a run in C#?

Read the CharacterSet property of Code128EncodingSegment, which returns a Code128CharacterSet value, or use CharacterSetName and CharacterSetShort for readable labels. The Data property holds the characters that run encoded.

Class Code128EncodingSegment

Q: What do StartPosition, Length, and SymbolCount mean on a segment?

StartPosition is the run's offset in the original data, Length is how many source characters it covers, and SymbolCount is how many barcode symbols it used. Together they show where a character-set switch happened and how many symbols it cost.

Represents a segment of data encoded with a specific Code 128 character set.

Inheritance

System.Object

Code128EncodingSegment

Namespace: IronBarCode

Assembly: IronBarCode.dll

Syntax

public class Code128EncodingSegment : Object

One contiguous run of Code 128 data encoded under a single character set is described by Code128EncodingSegment. A Code 128 barcode rarely stays in one set: the encoder shifts between sets A, B, and C to pack control codes, mixed text, and digit pairs efficiently, and each shift starts a new segment. A developer reaches for this object when the goal is to understand, run by run, exactly how a payload was laid out inside the symbol.

A segment sits inside the Segments list on Code128EncodingInfo, so a developer obtains it by inspecting an encoding report rather than constructing it directly. The object pins the run to its place and set. CharacterSet returns the Code128CharacterSet value that encoded the run, with CharacterSetName and CharacterSetShort giving readable and abbreviated labels for that set. Data holds the characters this run carried.

The position and size fields locate and measure the run. StartPosition is the run's offset within the original data, Length is how many source characters it covers, and SymbolCount is how many barcode symbols it consumed once encoded. Reading these together shows where a costly set switch happened and how many symbols it added, which is the practical way to explain why one input produced a wider barcode than another. The segment is read-only detail describing a finished encoding, so treat it as a measurement rather than a setting. The output data formats how-to shows how to surface these results, and the reading barcodes tutorial covers the surrounding read workflow.

using IronBarCode;

foreach (Code128EncodingSegment segment in info.Segments)
    Console.WriteLine(
        $"{segment.CharacterSetName} @ {segment.StartPosition}: {segment.Data} ({segment.SymbolCount} symbols)");

The checksum and format validation how-to walks through validating encoded data.

Constructors

Code128EncodingSegment()

Declaration

public Code128EncodingSegment()

Properties

CharacterSet

The character set used for this segment.

Declaration

public Code128CharacterSet CharacterSet { get; }

Property Value

Type	Description
Code128CharacterSet

CharacterSetName

Gets the character set as a string (e.g., "Code A", "Code B", "Code C").

Declaration

public string CharacterSetName { get; }

Property Value

Type	Description
System.String

CharacterSetShort

Gets a short representation of the character set (A, B, or C).

Declaration

public string CharacterSetShort { get; }

Property Value

Type	Description
System.String

Data

The raw data content of this segment.

Declaration

public string Data { get; }

Property Value

Type	Description
System.String

Length

The length of the data in the original input string.

Declaration

public int Length { get; }

Property Value

Type	Description
System.Int32

StartPosition

The starting position in the original input string.

Declaration

public int StartPosition { get; }

Property Value

Type	Description
System.Int32

SymbolCount

Number of Code 128 symbols required to encode this segment.

Declaration

public int SymbolCount { get; }

Property Value

Type	Description
System.Int32

Methods

ToString()

Declaration

public override string ToString()

Returns

Type	Description
System.String