In this article I will explain with an example, how to dynamically create and display Barcode Image in ASP.Net Core (.Net Core 10).
The Barcode Image will be dynamically generated using .Net Graphics API and Barcode Font in ASP.Net Core (.Net Core 10).
Note: The IDAutomationHC39M Free Version Barcode Font is provided by IDAutomation and they are the creators and owners of the Font and its license.
 
 

Software Information

This article makes use of Visual Studio 2026, and .Net Core 10.
 
 

Downloading and installing Barcode Font

First you will need to download the Free Barcode Font from the following link.
Download Barcode Font
Once downloaded follow the following steps.
1. Extract the Font from the ZIP file.
2. Double Click, Open the File and then click the Install Button as shown below.
.Net Core 10: Create and display Barcode in ASP.Net
 
3. After installation is completed, restart your machine.
 
 

Downloading System.Drawing.Common library

You will need to install the System.Drawing.Common package using the following command.
Install-Package System.Drawing.Common -Version 10.0.5
 
Note: The System.Drawing.Common package is necessary to use the System.Drawing class as it is not available in .Net Core.
 
 

Namespaces

You will need to import the following namespaces.
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;
 
 

Controller

The Controller consists of following Action methods.

Action method for handling GET operation

Inside this Action method, simply the View is returned.
 

Action method for handling POST operation

Inside this Action method, the value of the Barcode entered in the TextBox is captured as parameter.
First the length of the Barcode text is determined and a Bitmap Image is drawn. Then a White rectangle is drawn over the Bitmap Image using White Brush and the Barcode is drawn using Black Brush.
Finally, the image is saved to MemoryStream and then converted to Base64 string.
The Base64 string is set into a ViewBag object.
public class HomeController  : Controller
{
    public IActionResult Index()
    {
        return View();
    }
 
    [HttpPost]
    public IActionResult Index(string barcode)
    {
        using (MemoryStream  ms =  new MemoryStream())
        {
            //The Image is drawn based on length of Barcode text.
            using (Bitmap  bitMap =  new Bitmap(barcode.Length * 40, 80))
            {
                //The Graphics library object is generated for the Image.
                using (Graphics  graphics = Graphics.FromImage(bitMap))
                {
                    //The installed Barcode font.
                    Font  oFont =  new Font("IDAutomationHC39M Free Version", 16);
                    PointF  point =  new PointF(2f, 2f);
 
                    //White Brush is used to fill the Image with white color.
                    SolidBrush  whiteBrush =  new SolidBrush(Color.White);
                    graphics.FillRectangle(whiteBrush, 0, 0, bitMap.Width, bitMap.Height);
 
                    //Black Brush is used to draw the Barcode over the Image.
                    SolidBrush  blackBrush =  new SolidBrush(Color.Black);
                    graphics.DrawString("*"  + barcode +"*", oFont, blackBrush, point);
                }
 
                //The Bitmap is saved to Memory Stream.
                bitMap.Save(ms,ImageFormat.Png);
 
                //The Image is finally converted to Base64 string.
                ViewBag.BarcodeImage = "data:image/png;base64,"  +Convert.ToBase64String(ms.ToArray());
            }
        }
 
        return View();
    }
}
 
 

View

HTML Markup

The View consists of an HTML Form with following ASP.Net Tag Helpers attributes.
asp-action – Name of the Action. In this case the name is Index.
asp-controller – Name of the Controller. In this case the name is Home.
method – It specifies the Form Method i.e. GET or POST. In this case it will be set to POST.
The View consists of an HTML TextBox, a Submit Button and an Image element.
When the Submit Button is clicked, the Form is submitted and the generated Barcode Image is displayed in HTML Image element using ViewBag object.
@addTagHelper*, Microsoft.AspNetCore.Mvc.TagHelpers
@{
    Layout =  null;
}
 
<!DOCTYPE html>
 
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
</head>
<body>
    <form asp-action="Index" asp-controller="Home">
        <input type="text" name="barcode" />
        <input type="submit" value="Generate Barcode" />
    </form>
    <hr />
    @if  (ViewBag.BarcodeImage !=  null)
    {
        <img src="@ViewBag.BarcodeImage" alt="" />
    }
</body>
</html>
 
 

Screenshot

.Net Core 10: Create and display Barcode in ASP.Net
 
 

Testing Log

Compiled in: Visual Studio 2026
Framework: .Net Core 10.
Result: 100% Success
 
 

Downloads

Download Code