How to create and display a BarCode in a web application

Overview

Important

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This example illustrates how you can use our Barcode Generation API in ASP.NET to generate and display a barcode image on the webpage. The best approach implies creating a custom HTTP handler that generates and outputs an image. Here is a code of this handler:

public class BarCodeHandler : IHttpHandler {
    public void ProcessRequest(HttpContext context) {
        BarCode barCode = new BarCode();

        barCode.Symbology = Symbology.QRCode;
        barCode.CodeText = "123";

        context.Response.ContentType = "image/png";
        barCode.Save(context.Response.OutputStream, ImageFormat.Png);
        context.Response.End();
    }

    public bool IsReusable {
        get {
            return false;
        }
    }
}

Files to Review

• BarCodeHandler.ashx
• Default.aspx
• Default.aspx.cs

See Also:

• HTTP-handler for image

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