ASP.NET UPC-E Barcode Reader SDK - Scan & Decode UPC-E in ASP.NET Web

Besides the general UPC-E barcode recognition way, user could also use some other scanning methods to read & decode UPC-E barcodes in the ASP.NET web applications.

Method 1: Set maxOneBarcodePerPage to true
UPC-E Barcode Scanning SDK from BarcodeLib.com has a special function which could help the reader scan a maximum UPC-E barcode in a shorter time. And this function will be activated if user sets maxOneBarcodePerPage to true.

Once the function is activated, the reader will stop scanning instantly after it detects an UPC-E barcode. And the default value of maxOneBarcodePerPage in our barcode reader dll is false, which means the reader will use total 5 algorithms and scan the whole image from 4 directions.
Method 2: Use axis-positioning function
Our UPC-E barcode reader separates the whole image file into numerous small regions and those regions can be accurately located with usage of coordinates. The default coordinate of most left top point is (0%, 0%), and the coordinate of most right bottom point is (100%, 100%). The point X, Y values are expressed in percentage of the whole image.

Therefore, if user just wants to scan the top 20% and bottom 20% area, he/she could use following C# or VB.NET codes.

     OptimizeSetting setting = new OptimizeSetting();
    
     setting.setMaxOneBarcodePerPage(true);
    
     ScanArea top20 = new ScanArea(new PointF(0.0F, 0.0F), new PointF(100.0F, 20.0F));

     ScanArea bottom20 = new ScanArea(new PointF(0.0F, 80.0F), new PointF(100.0F, 100.0F));
    
     List<ScanArea> areas = new List<ScanArea>();
     areas.Add(top20);
     areas.Add(bottom20);
    
     setting.setAreas(areas);
    
     string[] results = BarcodeReader.read("c:/upce-aspnet.gif", BarcodeReader.UPCE, setting);

The above C# codes are built in Visual C# 2005

     Dim setting As OptimizeSetting = New OptimizeSetting()

     setMaxOneBarcodePerPage(True)

     Dim top20 As ScanArea = New ScanArea(New Drawing.PointF(0.0F, 0.0F), New Drawing.PointF(100.0F, 20.0F))

     Dim bottom20 As ScanArea = New ScanArea(New Drawing.PointF(0.0F, 80.0F), New Drawing.PointF(100.0F, 100.0F))

     Dim areas As List(Of ScanArea) = New List(Of ScanArea)
     areas.Add(top20)
     areas.Add(bottom20)

     setting.setAreas(areas)

     Dim datas() As String = BarcodeReader.read("c:/upce-aspnet.gif", BarcodeReader.UPCE, setting)

UPC-E Barcode Reader Library for ASP.NET Project