barcode in mvc

January 22, 2021

 Generate barcode in c# using Itext7

Install Itext7 from Nuget

Copy this code to your controller

[HttpGet]
        public ActionResult GenerateBarcode()
        {
         return View();
        }
        [HttpPost]
        public ActionResult GenerateBarcode(string barcode)
        {
            if (System.IO.File.Exists(Environment.GetFolderPath(Environment.SpecialFolder.Desktop) + "/Itext7Barcodes.pdf"))
                System.IO.File.Delete(Environment.GetFolderPath(Environment.SpecialFolder.Desktop) + "/Itext7Barcodes.pdf");
            using (var writer = new iText.Kernel.Pdf.PdfWriter(new FileStream(Environment.GetFolderPath(Environment.SpecialFolder.Desktop) + "/Itext7Barcodes.pdf", FileMode.Create)))
            {
                DataTable dt = new DataTable();
                dt.Columns.Add("Barcode");
                for (int i = 0; i < 20; i++)
                {
                    DataRow row = dt.NewRow();
                    row["Barcode"] = barcode;
                    dt.Rows.Add(row);
                }
                using (var pdf = new iText.Kernel.Pdf.PdfDocument(writer))
                {
                   var doc = new Document(pdf,new iText.Kernel.Geom.PageSize(24,12));
                    doc.SetMargins(5, 5, 1, 1);
                    for (int i = 0; i < dt.Rows.Count; i++)
                    {
                        var page = pdf.AddNewPage();
                        PdfFont font = PdfFontFactory.CreateFont("Times-BoldItalic", false);
                        PdfCanvas pdfCanvas = new PdfCanvas(page);
                        pdfCanvas.SetFontAndSize(font, 1.0f);
                        pdfCanvas.BeginText();
                        pdfCanvas.SetTextMatrix(1.2f, 7.5f);
                        pdfCanvas.ShowText("Product Name");
                        pdfCanvas.EndText();

                        var bc = new Barcode128(pdf);
                        bc.SetTextAlignment(0);
                        bc.SetCodeType(Barcode128.CODE128);
                        bc.SetStartStopText(false);
                        bc.SetCode(barcode);
                        bc.SetExtended(true);

                        //Here's how to add barcode to PDF with IText7
                        var img = new Image(bc.CreateFormXObject(pdf));
                        img.ScaleToFit(60, 5);
                        doc.Add(img);
                    }
                   

                    doc.Close();
                    
                    
                }
              
            }

            System.Diagnostics.Process.Start(Environment.GetFolderPath(Environment.SpecialFolder.Desktop) + "/Itext7Barcodes.pdf");
            return Json(0, JsonRequestBehavior.AllowGet);
        }
copy this code to your view
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@{
    ViewBag.Title = "GenerateBarcode";
}


@using (Html.BeginForm("GenerateBarcode", "Home", FormMethod.Post))
{
    <div class="row">
        <div class="col-md-3"></div>
        <div class="col-md-6">
            <h2>Generate Bar Code</h2>
            <input type="text" name="barcode" Class="form-control col-4" ID="textCode" />
            <br />
            <input type="submit" Class="btn btn-primary" ID="btnGenerate" value="Generate" />
            <hr />
        </div>
    </div>
}

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