How to Generate Code128 in ASP.NET Web Server?

In this example, we will give a guide to introduce you how to generate Code128 using C# in ASP.NET project.

using System;
using System.Web;
using System.Web.UI;
using PQScan.BarcodeCreator;

namespace Code128GeneratorInWeb
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            Barcode code128 = new Barcode();

            code128.Data = "123456789";
            code128.BarType = BarCodeType.Code128;
            code128.Width = 200;
            code128.Height = 100;
            code128.ShowText = true;

            code128.CreateBarcode("code128-webforms.bmp");
        }
    }
}

1. Publish your ASP.NET web site to IIS.
2. Copy "PQScan.BarcodeCreator.dll" file from downloaded barcode generator package to your IIS bin folder.
3. Copy "BarcodeWebHandler.ashx" file from downloaded barcode generator package to your IIS.
4. Create an empty html, and add the image code <img src="http://localhost:port/BarcodeWebHandler.ashx?BarType=Code128&Data=123456789&Width=150&Height=100&ShowText=True"/> to the page.
5. Open html page on web browser to view the Code128 barcode created on the page.

Note: Ensure the "BarcodeWebHandler.ashx" file is copied to the folder where the web pages you want to generate Code 128 barcodes, otherwise the Code128 image will not appear.

Additional, we provide a much more easier way to draw Code 128 image on web pages by ASP.NET Barcode web control. Follow these steps:

1. Unzip the downloaded Code128 barcode generator package, copy the "PQScan.BarcodeCreator.dll" to your web application's bin folder.
2. Add ASP.NET Barcode Creator Web Control to Visual Studio Toolbox.
3. Drag and drop BarcodeWebControl item to your ASPX web forms.
4. Copy "BarcodeWebHandler.ashx" file to the file path where the web page would render Code128 images.
5. Run the web application to view the Code128 image generated.
6. To customize the Code128 image, you can customize barcode property settings in the right-side "properties" pane or in the run-time code. What's more, changing Code128 web image control's src property by java script in client side is also support.