How to create, print UPC-A in SSRS Reports in ASP.NET, WinForms application?

// generate barcode and encode to image file
public void drawBarcode(string filename)

// generate barcode and paint on Graphics object
public void drawBarcode(Graphics graphics)

// generate barcode and paint on Bitmap object
public Bitmap drawBarcode()

// generate barcode and paint on Stream object
public void drawBarcode(Stream fileStream)

// generate barcode and paint on byte[] object
public byte[] drawBarcodeAsBytes()

Using the OnBarcode SSRS Barcode Generator library, you can customize your UPC-A barcode to fit your SSRS report's layout and compliance requirements. The following customization options are available, all configured in the Report Item Property pane:

• ShowQuietZoneIndicator: Displays or hides the UPC barcode quiet zone indicator. The default value is true.
• UPCEANLeadDigitSpace: Sets the space between the first digit and the start character bar. The default value is 0.
• UPCEANTrailDigitSpace: Sets the space between the stop character bar and the quiet zone indicator. The default value is 0.
• UPCEANLeadTrailDigitSizeRatio: Controls the font size of the first and last digits relative to the rest of the digits. The default value is 1.0f (all digits same size).

Let's walk through each customization option and how to apply them in your SSRS report.

The quiet zone indicator is a small mark at the end of the UPC-A barcode. It denotes the end of the quiet zone (empty space around the barcode), which is critical for scannability.

By default, the C# Barcode Generator library displays this indicator in your SSRS report.

To hide the quiet zone indicator:

• Set the ShowQuietZoneIndicator property to false in the Report Item Property pane.

You can adjust the spacing, vertical position, and font size of the first and last digits of the UPC-A barcode to improve readability or fit your SSRS report's layout.

Adjust Digit Spacing

Use the following properties to increase the space around the first and last digits (configured in the Report Item Property pane):

• UPCEANLeadDigitSpace: Increases the space between the first digit and the start bar.
• UPCEANTrailDigitSpace: Increases the space between the stop character bar and the quiet zone indicator.

Adjust Vertical Position of Digits

Use the following properties to adjust the vertical offset of the first and last digits (configured in the Report Item Property pane):

• UPCEANLeadDigitYShift: Controls the vertical offset of the first digit in the UPC-A barcode text.
• UPCEANTrailDigitYShift: Controls the vertical offset of the last digit in the UPC-A barcode text.

Adjust Digit Font Size

se the UPCEANLeadTrailDigitSizeRatio property to customize the font size of the first and last digits relative to the rest (configured in the Report Item Property pane). The value represents the ratio of the first/last digit font size to the rest of the digits (e.g., 0.6f means the first/last digits are 60% the size of the other digits).

The UPC-A check digit is a critical component for data integrity. It is calculated using a modulo 10 algorithm, based on the weighted sum of the first 11 digits (which include the UPC number system, manufacturer code, and product code). Follow these steps to calculate the UPC-A check digit manually (useful for validating your SSRS dataset data before encoding):

1. Consider the right-most digit of the 11-digit data as being in an "odd" position. Assign odd/even positions to each digit by moving from right to left.
2. Sum the digits in all odd positions, then multiply the result by 3.
3. Sum the digits in all even positions.
4. Add the two totals calculated in steps 2 and 3.
5. The check digit is the number that, when added to this total, results in a number evenly divisible by 10.
6. If the total from step 4 is already evenly divisible by 10, the check digit is "0" (not 10).

Example: If your SSRS dataset Field contains the 11-digit UPC-A data "12345678901", the correct check digit is "2". The full 12-digit UPC-A code would be "123456789012".