PostNet

• May 22, 2026
• 2 minutes to read

PostNet is a USPS barcode that speeds mail sorting and routing. The symbology encodes data in bar heights - bars share a common width but vary in height.

View Example

Examples

Configure Barcode Settings (PostNetOptions)

Use the PostNetOptions class to configure PostNet barcode settings.

The following code snippet creates a PostNet barcode with 9 digits and specifies its options:

C#

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

var postnetOptions = new PostNetOptions();
postnetOptions.BackColor = Color.LightGray;
postnetOptions.ShowText = false;
postnetOptions.Padding = new Padding(5);
postnetOptions.BorderWidth = 1;
postnetOptions.BorderColor = Color.Blue;

using var postnetOptionsStream = new FileStream(Path.Combine(outDir, "barcode_symbology_postnet.png"), FileMode.Create, FileAccess.Write);
using var postnetOptionsGenerator = new BarcodeGenerator(postnetOptions);
postnetOptionsGenerator.Export("123456789", postnetOptionsStream, DXImageFormat.Png);

VB.NET

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

Dim postnetOptions As New PostNetOptions()
postnetOptions.BackColor = Color.LightGray
postnetOptions.ShowText = False
postnetOptions.Padding = New Padding(5)
postnetOptions.BorderWidth = 1
postnetOptions.BorderColor = Color.Blue

Using postnetOptionsStream As New FileStream(Path.Combine(outDir, "barcode_symbology_postnet.png"), FileMode.Create, FileAccess.Write)
    Using postnetOptionsGenerator As New BarcodeGenerator(postnetOptions)
        postnetOptionsGenerator.Export("123456789", postnetOptionsStream, DXImageFormat.Png)
    End Using
End Using

Configure Barcode Settings (Fluent API)

Use the PostNetOptionsBuilder class to configure PostNet barcode settings with Fluent API.

The following code snippet creates a PostNet barcode with 9 digits and specifies its options:

C#

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

var postNetCode = PostNetOptionsBuilder.Create()
    .WithBackColor(Color.LightGray)
    .WithShowText(false)
    .WithPadding(5)
    .WithBorderWidth(1)
    .WithBorderColor(Color.Blue)
    .Build();

var filePath = Path.GetFullPath("postnet_barcode.png");

using var stream = new FileStream(filePath, FileMode.Create);
using var generator = new BarcodeGenerator(postNetCode);
generator.Export("123456789", stream, DXImageFormat.Png);

VB.NET

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

Module Module1
    Sub Main()
        Dim postNetCode = PostNetOptionsBuilder.Create() _
            .WithBackColor(Color.LightGray) _
            .WithShowText(False) _
            .WithPadding(5) _
            .WithBorderWidth(1) _
            .WithBorderColor(Color.Blue) _
            .Build()

        Dim filePath = Path.GetFullPath("postnet_barcode.png")

        Using stream As New FileStream(filePath, FileMode.Create)
            Using generator As New BarcodeGenerator(postNetCode)
                generator.Export("123456789", stream, DXImageFormat.Png)
            End Using
        End Using
    End Sub
End Module

Symbology-Specific Options

This symbology has no additional options.