Generate Multiple Barcodes within Single Image

Aspose.BarCode for .NET allows creating multiple barcodes of different types within one image, including postal, QR Code, PDF417, EAN, Code 39, Code 128, ISBN, MSI, and others.

// For complete examples and data files, please go to https://github.com/aspose-barcode/Aspose.BarCode-for-.NET

// The path to the documents directory.
string dataDir = RunExamples.GetDataDir_TechnicalArticles();

Dictionary<string, BaseEncodeType> collection = new Dictionary<string, BaseEncodeType>();
collection.Add("ONE123", EncodeTypes.Code39Standard);
collection.Add("Process Collection", EncodeTypes.DataMatrix);
collection.Add("Dictionary Collection", EncodeTypes.QR);
collection.Add("X06712AT", EncodeTypes.Code128);
collection.Add("979026000043", EncodeTypes.EAN13);
collection.Add("Aztec BarCode", EncodeTypes.Aztec);

List<Bitmap> images = new List<Bitmap>();

foreach (KeyValuePair<string, BaseEncodeType> pair in collection)
{
    BarcodeGenerator builder = new BarcodeGenerator(pair.Value, pair.Key);
    images.Add(builder.GenerateBarCodeImage());
}

int maxWidth = int.MinValue;
int sumHeight = 0;
foreach (Bitmap bmp in images)
{
    sumHeight += bmp.Height;
    if (maxWidth < bmp.Width)
        maxWidth = bmp.Width;
}

const int offset = 10;
Bitmap resultBitmap = new Bitmap(maxWidth + offset * 2, sumHeight + offset * images.Count);
using (Graphics g = Graphics.FromImage(resultBitmap))
{
    g.Clear(Color.White);

    int yPosition = offset;
    for (int i = 0; i < images.Count; ++i)
    {
        Bitmap currentBitmap = images[i];
        g.DrawImage(currentBitmap, offset, yPosition);
        yPosition += currentBitmap.Height + offset;
    }
}

resultBitmap.Save(dataDir + "barcodes_out.png", ImageFormat.Png);

A sample image with several barcodes is provided below.