Barcode Xpress for Node.js v13.2 - Updated
The Code 39 Extended barcode is a variable-length, alphanumeric, self-checking, bi-directional 1D barcode with an optional checksum for error detection. Code 39 Extended extends the Code 39 symbology to support the full ASCII character set.
The following example barcode encodes the information "CODE 39 EXT" as an Code 39 Extended barcode:
Extended characters are encoded by using a pair of Code 39 characters. For example, a lowercase "a" is encoded by the character pair +A. 1
Similar to Code 39 barcodes, each data character is made up of 5 bars and 4 spaces for a total of 9 elements. Each character includes 3 wide and 6 narrow elements. Thus, 3 out of the 9 elements are always wide, which is the reason why the symbology is sometimes called "Code 3 of 9".
The Code 39 Extended is governed by ISO/IEC 16388. 1
Each Code 39 Extended barcode can include an optional modulo 43 checksum. Additionally, Code 39 symbology is self-checking.
To detect Code 39 Extended barcodes, set the BarcodeTypes property to this type so that the barcode engine specifically looks for Code 39 Extended. Otherwise, it might confuse a Code 39 Extended barcode with a Code 39 barcode.
By default, Barcode Xpress does not write optional checksums. If a checksum is required for Code 39, set the CheckSum property to 1(TRUE) and Barcode Xpress will calculate and write the checksum.
Code 39 requires a quiet zone, which should be at least the width of 10 narrow bars. This means that if you set the MinimumBarWidth property to 3 pixels (narrow bar size), you should set the HorizontalWhiteSpace property to 30 pixels.
To detect Code 39 Extended barcodes, set the BarcodeTypes property to this type so that the barcode engine specifically looks for Code 39 Extended. Otherwise, it might confuse a Code 39 Extended barcode with a Code 39 barcode.
To detect Code 39 Extended barcodes, set the barcode type to this barcode type using the SetBarcodeReaderType method so that the barcode engine specifically looks for Code 39 Extended. Otherwise, it might confuse a Code 39 Extended barcode with a Code 39 barcode.
By default, Barcode Xpress does not write optional checksums. If a checksum is required for Code 39, set the WriteChecksumChar property to True and Barcode Xpress will calculate and write the checksum.
Code 39 requires a quiet zone, which should be at least the width of 10 narrow bars. This means that if you set the MakeBarcodeBarSize property to 3 pixels (narrow bar size), set the MakeBarcodeBWidth property to 30 pixels.
To detect Code 39 Extended barcodes, set the type parameter to this type so that the barcode engine specifically looks for Code 39 Extended. Otherwise, it might confuse a Code 39 Extended barcode with a Code 39 barcode.
To detect Code 39 Extended barcodes, set the BarcodeType property to this type so that the barcode engine specifically looks for Code 39 Extended. Otherwise, it might confuse a Code 39 Extended barcode with a Code 39 barcode.
By default, Barcode Xpress for Linux does not write optional checksums. If a checksum is required for Code 39, set the EnableCheckSum property to 1(TRUE) and the barcode engine will calculate and write the checksum.
Code 39 requires a quiet zone, which should be at least the width of 10 narrow bars. This means that if you set the MinimumBarWidth property to 3 pixels (narrow bar size), you should set the HorizontalWhiteSpace property to 30 pixels.
To detect Code 39 Extended barcodes, you should set the type parameter to this type so that the barcode engine specifically looks for Code 39 Extended. Otherwise, it might confuse a Code 39 Extended barcode with a Code 39 barcode.
Code 39 Extended is a variant of Code 39, extending it to support the full ASCII character set.
Code 93 barcodes were designed to increase data density and integrity in comparison to Code 39 symbology.
For more information, see the Barcode Xpress SDK product page or try our online demos.