Read Barcodes in Specific Order

When an image contains several barcodes, developers may want to read them in a specific order. This code example shows how to implement this feature using Aspose.BarCode for .NET.

public static void Run()
{
   
    // The path to the documents directory.
    string dataDir = RunExamples.GetDataDir_ManageBarCodes();
    List<FoundBarCodes> found = new List<FoundBarCodes>();
    using (BarCodeReader reader = new BarCodeReader(dataDir + "tiffImage.tif", DecodeType.Code128))
    {
        foreach (BarCodeResult result in reader.ReadBarCodes())
            found.Add(new FoundBarCodes(result.CodeText, result.Region));
    }
    found.Sort(new FoundComparator());
    int i = 1;
    foreach (FoundBarCodes barcode in found)
    {
        Console.WriteLine("Codetext ( " + i + " ): " + barcode.CodeText);
        Console.WriteLine("Top left coordinates: X = " + barcode.region.Points[0].X + ", Y = " + barcode.region.Points[0].Y);
        Console.WriteLine("Bottom left coordinates: X = " + barcode.region.Points[1].X + ", Y = " + barcode.region.Points[1].Y);
        Console.WriteLine("Bottom right coordinates: X = " + barcode.region.Points[2].X + ", Y = " + barcode.region.Points[2].Y);
        Console.WriteLine("Top right coordinates: X = " + barcode.region.Points[3].X + ", Y = " + barcode.region.Points[3].Y);
        Console.WriteLine();
        i++;
    }
}

public struct FoundBarCodes
{
    public readonly string CodeText;
    public readonly BarCodeRegionParameters region;
    public FoundBarCodes(string text, BarCodeRegionParameters reg)
    {
        CodeText = text;
        region = reg;
    }
}

public class FoundComparator : IComparer<FoundBarCodes>
{
    public int Compare(FoundBarCodes found1, FoundBarCodes found2)
    {
        Point[] found1Points = found1.region.Points;
        Point[] found2Points = found2.region.Points;
        Point found1XyMin = new Point(int.MaxValue, int.MaxValue);
        Point found2XyMin = new Point(int.MaxValue, int.MaxValue);
        foreach (Point p in found1Points)
            if (p.X < found1XyMin.X && p.Y < found1XyMin.Y)
            {
                found1XyMin.X = p.X;
                found1XyMin.Y = p.Y;
            }
        foreach (Point p in found2Points)
            if (p.X < found2XyMin.X && p.Y < found2XyMin.Y)
            {
                found2XyMin.X = p.X;
                found2XyMin.Y = p.Y;
            }
        if (found1XyMin.X < found2XyMin.X && found1XyMin.Y < found2XyMin.Y)
            return -1;
        if (found1XyMin.X > found2XyMin.X && found1XyMin.Y > found2XyMin.Y)
            return 1;
        if (found1XyMin.Y < found2XyMin.Y)
            return -1;
        if (found1XyMin.Y > found2XyMin.Y)
            return 1;
        return 0;
    }
}