.NET USPS Intelligent Mail Barcode (OneCode) Generator for .NET, ASP.NET, C#, VB.NET

OneCode 4-State Customer Barcode (4-CB) is the next generation in the evolution of USPS barcode technology. It does not replace existing barcodes - it offers a more effective alternative. Partnering with the Mailing Industry, the Postal Service developed the 4-CB which increases the amount of information carried on letter and flats mail pieces and allows for expanded tracking capability, creating greater visibility into the mailstream.

4-CB is a height-modulated barcode using four distinct, vertical bar types. It encodes a 31-digit string into 65 vertical bars each representing one of four possible states: full bar, ascender, tracker, and descender.

4-State Barcode Bars

4-CB carries a payload 31 digits comprised of the following elements.

Type	Field	Digits
Tracking Code	Barcode Identifier	2 (2nd digit must be 0?)
	Special Services	3
	Customer Identifier	6
	Sequence Number	9
Routing Code	Delivery Point ZIP Code	0, 5, 9, or 11

Table 1 - USPS OneCode SOLUTION Barcode Data Fields

For each of the fields in Table 1, except the Routing Code, leading or trailing zeros shall be provided to achieve the correct size. Spaces and nulls are not acceptable characters for padding. For ZIP Codes, which have one of four lengths, encoding shall provide padding beyond the digits to be encoded. No error detection and correction, such as a checksum with POSTNET or PLANET, shall be included as part of the data fields. The OneCode Barcode Data Fields are described as follows:

The Barcode Identifier is assigned by USPS for the type of tracking service. This is two digits, with the second digit in the range of 0-4
The Special Services is assigned by USPS for any special services on the mailpiece. The allowable encoding range is 000-999
The Customer Identifier is assigned by USPS as a unique identifier for each OneCode SOLUTION customer. The allowable encoding range is 000000?99999
The Sequence Number is assigned by the mailer for tracking mailpieces. The allowable encoding range is 000000000-999999999
The Delivery Point ZIP Code is assigned by the mailer for routing the mailpiece. This replaces POSTNET for routing the mailpiece to its final delivery point. The length may be 0, 5, 9, or 11 digits. The allowable encoding ranges are no ZIP Code, 00000-99999, 000000000-999999999, and 0000000000-99999999999

Onecode Barcode for .NET, ASP.NET supports:

0, 1, 2, 3, 4, 5, 6, 7, 8, 9

     BarcodeLib.Barcode.Linear barcode = new BarcodeLib.Barcode.Linear();    
     barcode.Type = BarcodeType.ONECODE;

     // should be 20, 25, 29, or 31 digits.
     barcode.Data = "0123456709498765432101234567891";
    
     barcode.UOM = UnitOfMeasure.PIXEL;
     barcode.BarWidth = 1;
     barcode.BarHeight = 80;
     barcode.LeftMargin = 10;
     barcode.RightMargin = 10;
     barcode.TopMargin = 10;
     barcode.BottomMargin = 10;
    
     barcode.ImageFormat = System.Drawing.Imaging.ImageFormat.Png;
     // more barcode settings here
                            
     // save barcode image into your system
     barcode.drawBarcode("c://barcode.png");
    
     // generate barcode & output to byte array
     byte[] barcodeInBytes = barcode.drawBarcodeAsBytes();
    
     // generate barcode to Graphics object
     Graphics graphics = ...
     barcode.drawBarcode(graphics);
    
     // generate barcode and output to Bitmap object
     Bitmap barcodeInBitmap = barcode.drawBarcode();
    
     // generate barcode and output to HttpResponse object
     HttpResponse response = ...;
     barcode.drawBarcode(response);
    
     // generate barcode and output to Stream object
     Stream stream = ...;
     barcode.drawBarcode(stream);

.NET USPS OneCode Generator for ASP.NET, C#, VB.NET