pq scan
C# & VB.NET UPC-E Decoding Examples
C# UPC-E Reading Example
In this example, we illustrate how to use free C#.NET programming demo to detect and recognize UPC-E barcode from image file on your computer disk. As shown in this demo, robust .NET APIs can be implemented to customize a barcode type (UPC-E) to read from three forms of image source in C# programming.
public void ScanUPCEFromFile(string filename)
{
// C# example for scanning UPC-E from an image string.
BarcodeResult[] results = BarCodeScanner.Scan(filename, BarCodeType.UPCE);
// C# APIs for scanning UPC-E from an image stream and a bitmap of image.
// public static BarcodeResult[] Scan(Bitmap bitmap, BarCodeType barType);
// public static BarcodeResult[] Scan(Stream stream, BarCodeType barType);
foreach (BarcodeResult result in results)
{
Console.WriteLine(result.BarType.ToString() + "-" + result.Data);
}
}
If your image source has only one UPC-A barcode symbology, you can use the following C# sample code. It will improve the accuracy of single barcode reading.
Bitmap bmp = new Bitmap("YourImagePath");
BarcodeResult barcode = BarCodeScanner.ScanSingle(bmp);
Console.WriteLine("barcode data:{0}.", barcode.Data);
VB.NET UPC-E Reading Example
Similar to above C# example, three .NET APIs can be used in VB.NET UPC-E reading project. But here's a difference. These APIs will read all barcodes on your loaded image source instead of reading UPC-E only. You may copy this VB.NET demo to have a test.
Public Sub ScanAllFromFile(ByVal filename As String)
' VB.NET example for scanning UPC-E and all other barcode types from an image string.
Dim results() As BarcodeResult = BarCodeScanner.Scan(filename)
' VB.NET example for scanning UPC-E and all other barcode types from an image stream or a bitmap of image.
' public static BarcodeResult[] Scan(Bitmap bitmap)
' public static BarcodeResult[] Scan(Stream stream)
Dim result As BarcodeResult
For Each result In results
Console.WriteLine(result.BarType.ToString() + "-" + result.Data)
Next
End Sub
For single UPC-E barcode recognition in VB.NET project, please use the following VB.NET sample code.
Dim bmp As Bitmap = New Bitmap("YourImagePath")
Dim barcode As BarcodeResult = BarCodeScanner.ScanSingle(bmp)
Console.WriteLine("barcode data:{0}.", barcode.Data)
