Generate QR Code Image in ASP.NET Using Google Chart API
Google Chart API returns an image in response to a URL GET or POST request. All the data required to create the graphic is included in the URL, including the image type and size.
var url = string.Format("http://chart.apis.google.com/chart?cht=qr&chs={1}x{2}&chl={0}", txtCode.Text, txtWidth.Text, txtHeight.Text);
WebResponse response = default(WebResponse);
Stream remoteStream = default(Stream);
StreamReader readStream = default(StreamReader);
WebRequest request = WebRequest.Create(url);
response = request.GetResponse();
remoteStream = response.GetResponseStream();
readStream = new StreamReader(remoteStream);
System.Drawing.Image img = System.Drawing.Image.FromStream(remoteStream);
img.Save("D:/QRCode/" + txtCode.Text + ".png");
response.Close();
remoteStream.Close();
readStream.Close();
txtCode.Text = string.Empty;
txtWidth.Text = string.Empty;
txtHeight.Text = string.Empty;
lblMsg.Text = "The QR Code generated successfully";
Click here for complete source code to download
Demo of application for free QR Code generator using C#
