How to create and display a BarCode in a web application

This example illustrates how you can use our new Bar Code Library in ASP.NET to generate and display a barcode image on the webpage. The best approach implies creating a custom HTTP Handler that will generate and output an image. Here is a code of this handler:

[C#]
publicclassBarCodeHandler:IHttpHandler{publicvoidProcessRequest(HttpContextcontext){BarCodebarCode=newBarCode();barCode.Symbology=Symbology.QRCode;barCode.CodeText="123";context.Response.ContentType="image/png";barCode.Save(context.Response.OutputStream,ImageFormat.Png);context.Response.End();}publicboolIsReusable{get{returnfalse;}}}

The img tag in the main aspx page is defined as follows:

[ASPx]
<imgsrc="BarCodeHandler.ashx"alt="QRCode"width="200px"height="200px"/>

See Also:

HTTP-handler for image