How To Generate Barcode In ASP.NET Using C#

We can add the annotation to the barcode, set them, set the font, display its value below it, add margins, change the barcode color, and then save it, all quite simply in C#. We can also choose to export to HTML or PDF instead of an image if that is more appropriate for our application.

// Styling a QR code and adding annotation text
barcode.AddBarcodeValueTextBelowBarcode();
barcode.AddBarcodeValueTextAboveBarcode();
barcode.SetMargins(10);
barcode.ChangeBarCodeColor(Color.BlueViolet);

Design HTML Web From GenerateBarcode.

Drag and drop TextBox, Button, and Image control from the Visual Studio toolbox.

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="GenerateBarcode.aspx.cs" Inherits="GenerateBarcode.GenerateBarcode" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <link href="lib/bootstrap/css/bootstrap.min.css" rel="stylesheet" />
</head>
<body>
    <form id="form1" runat="server">
        <div class="container">
            <h2>Generate QR Images in C#</h2>
            <div class="row">
                <div class="col-4">
                    <div class="form-group">
                        <label>Enter a value to generate barcode:</label>
                        <div class="input-group">
                            <asp:TextBox ID="txtGenerateBarcode" runat="server" CssClass="form-control"></asp:TextBox>
                            <div class="input-group-append">
                                <asp:Button ID="BtnGenerateBarcode" runat="server" Text="Generate Barcode" CssClass="btn btn-primary" OnClick="BtnGenerateBarcode_Click" />
                            </div>
                        </div>
                    </div>
                </div>
            </div>
            <asp:Image ID="ImageGeneratedBarcode" runat="server" CssClass="img-thumbnail" Visible="false"/>
        </div>
    </form>
</body>
</html> 

Double click or enter Button control. It will create an event in code behind aspx.cs file

Write the following code,

Add namespace

using IronBarCode;
using System;
using System.Drawing;
using System.IO;

namespace GenerateBarcode
{
    public partial class GenerateBarcode : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            ImageGeneratedBarcode.Visible = false;
        }

        protected void BtnGenerateBarcode_Click(object sender, EventArgs e)
        {
            string generatebarcode = txtGenerateBarcode.Text;
            GeneratedBarcode barcode = BarcodeWriter.CreateBarcode(generatebarcode, BarcodeWriterEncoding.Code128);
            barcode.ResizeTo(400, 120);

            // Styling a QR code and adding annotation text
            //barcode.AddBarcodeValueTextAboveBarcode();
            barcode.AddBarcodeValueTextBelowBarcode();
            barcode.SetMargins(10);
            barcode.ChangeBarCodeColor(Color.BlueViolet);

            var folder = Server.MapPath("/App_Data/GeneratedBarcodeImage");
            if (!Directory.Exists(folder))
            {
                Directory.CreateDirectory(folder);
            }
            string filePath = Server.MapPath("GeneratedBarcodeImage/barcode.png");
            barcode.SaveAsPng(filePath);
            ImageGeneratedBarcode.ImageUrl = "~/GeneratedBarcodeImage/" + Path.GetFileName(filePath);
            ImageGeneratedBarcode.Visible = true;
        }
    }
}

Run project Ctrl+F5

Conclusion

The IronBarcode is also helpful in creating Barcode Images, Barcode HTML, and Barcode PDF formate. Using Barcode we can create different types of images file like png, jpg, Gif, etc. The code of this tutorial is attached. You can download the code, play with the code and modify it according to your project requirement. Thank you for reading. Happy coding.