UPC-A Barcode C#.NET Generation SDK

1. Create a new Linear object, and set the Type property to BarcodeType.UPCA
2. Set the property Data with the UPC-A encoding digits. You can provide 11 digits or 12 digits to barcode property.
3. Call method drawBarcode to print the UPC-A barcode to a png image file.

Linear barcode = new Linear();
barcode.Type = BarcodeType.UPCA;
barcode.Data = "12345678901";
barcode.drawBarcode("C://BarcodeLib//csharp-upc-a-sample.png");

• Country code: 2 to 3 digits (identifies the country/region of origin).
• Manufacturer code: Unique code assigned to the product manufacturer.
• Product code: Specific code for the individual product.
• Check digit: The 13th digit, used to verify the validity of the entire barcode.

• Use BarcodeType.UPCA_2 for a 2‑digit add‑on symbol. Use BarcodeType.UPCA_5 for a 5‑digit add‑on symbol.
• Set the Data property to your valid EAN‑13 main barcode data.
• Set the SData property to the 2‑digit or 5‑digit add‑on value.

Linear barcode = new Linear();
barcode.Type = BarcodeType.UPCA_2;
barcode.Data = "12345678901";
barcode.SData = "12";
barcode.drawBarcode("C://BarcodeLib//csharp-upc-a-addon-2-digits.png");

5-digit addon

Linear barcode = new Linear();
barcode.Type = BarcodeType.UPCA_5;
barcode.Data = "12345678901";
barcode.SData = "12345";
barcode.drawBarcode("C://BarcodeLib//csharp-upc-a-addon-5-digits.png");

1. First, identify the position (odd/even) of each digit.
   
   Treat the right-most digit of the UPC-A number as being in an "odd" position.
   Assign odd/even positions to each digit by moving from right to left.


2. Calculate the sum of all digits that fall in odd positions.
   Multiply this sum by 3 to get the weighted odd-position total.


3. Calculate the sum of all digits that fall in even positions.


4. Add the weighted odd-position total (from step 2) and the even-position sum (from step 3) together.


5. Determine the checksum digit. It is the number that, when added to the total from step 4, results in a value divisible by 10.


6. If the total from step 4 is already evenly divisible by 10, the checksum digit is 0 (not 10, as 10 is not a single digit).

• Use the ImageWidth property to set the total width of the generated UPC-A barcode image.
• Use the ImageHeight property to set the total height of the generated UPC-A barcode image.

Linear barcode = new Linear();
barcode.Type = BarcodeType.UPCA;
barcode.Data = "12345678901";
barcode.ImageWidth = 250;
barcode.ImageHeight = 200;
barcode.drawBarcode("C://BarcodeLib//csharp-upc-a-barcode-size.png");

Space between text and barcode modules

Linear barcode = new Linear();
barcode.Type = BarcodeType.UPCA;
barcode.Data = "12345678901";
barcode.TextFont = new Font("OCR-B", 22);
barcode.TextMargin = 10;
barcode.drawBarcode("C://BarcodeLib//csharp-upc-a-barcode-text-label.png");

• Enable the EANUPCShowIndicator property to true to show the UPC-A (with add-on) quiet zone indicator.

Linear barcode = new Linear();
barcode.Type = BarcodeType.UPCA_2;
barcode.Data = "12345678901";
barcode.SData = "12";
barcode.EANUPCShowIndicator = true;
barcode.drawBarcode("C://BarcodeLib//csharp-upc-a-addon-2-digits-show-indicator.png");

Adjust Horizontal Spacing for UPC-A Barcode

• Use the EANUPCFirstDigitShift property to increase the space between the first digit and the start bar of a UPC-A barcode.
• Use the EANUPCLastDigitShift property to increase the space between the stop character and the quiet zone indicator.
• Both properties help you fine-tune the barcode layout for better readability and printing.

Adjust Vertical Offset of Barcode Digits

• Use the EANUPCFirstDigitShiftY property to set the vertical offset distance for the first digit in the barcode text.
• Use the EANUPCLastDigitShiftY property to set the vertical offset distance for the last digit in the barcode text.
• These properties apply to both UPC-A and EAN-13 barcode formats.

Customize Font Size of First and Last Digits

• Use the UPCFirstLastDigitScale property to customize the font size of the first and last digits.
• This property defines the size ratio between the first/last digits and all other digits in the UPC-A barcode.
• Adjust the value to enlarge or reduce the font size of the leading and trailing digits.

Linear barcode = new Linear();
barcode.Type = BarcodeType.UPCA;
barcode.Data = "12345678901";
barcode.EANUPCFirstDigitShift = 10;
barcode.EANUPCLastDigitShift = 10;
barcode.EANUPCFirstDigitShiftY = -20;
barcode.EANUPCLastDigitShiftY = -20;
barcode.UPCFirstLastDigitScale = 0.7f;
barcode.drawBarcode("C://BarcodeLib//csharp-upc-a-barcode-first-last-digits-setting.png");

Bar Height (SHeightRatio)

Bar Space (SSeparation)

Linear barcode = new Linear();
barcode.Type = BarcodeType.UPCA_2;
barcode.Data = "12345678901";
barcode.SData = "12";
barcode.SHeightRatio = 0.6f;
barcode.SSeparation = 100;
barcode.drawBarcode("C://BarcodeLib//csharp-upc-a-addon-setting.png");

• Configure the BarColor property to define the color of the barcode bar modules (set to red).
• Configure the BackgroundColor property to define the color of the barcode space modules and quiet zones (set to light blue).
• Configure the TextFontColor property to define the color of the UPC-A barcode text label.

Linear barcode = new Linear();
barcode.Type = BarcodeType.UPCA;
barcode.Data = "12345678901";
barcode.BarColor = Color.Red;
barcode.BackgroundColor = Color.LightBlue;
barcode.TextFontColor = Color.Red;
barcode.drawBarcode("C://BarcodeLib//csharp-upc-a-barcode-color-setting.png");