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This article is about how asp.net uses QRCode to generate QR codes with Logo or images in the picture center. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

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Using System;using System.Web;using ThoughtWorks.QRCode.Codec;using ThoughtWorks.QRCode.Codec.Data;using ThoughtWorks.QRCode.Codec.Util;using System.IO;using System.Text;using System.Drawing;using System.Drawing.Drawing2D;public class GetQRCode: IHttpHandler {public void ProcessRequest (HttpContext context) {String data = context.Request ["CodeText"]; if (! string.IsNullOrEmpty (data)) {QRCodeEncoder qrCodeEncoder = new QRCodeEncoder (); qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE QrCodeEncoder.QRCodeScale = 4; qrCodeEncoder.QRCodeVersion = 8; qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M; System.Drawing.Image image = qrCodeEncoder.Encode (data); System.IO.MemoryStream MStream = new System.IO.MemoryStream (); image.Save (MStream, System.Drawing.Imaging.ImageFormat.Png); System.IO.MemoryStream MStream1 = new System.IO.MemoryStream () CombinImage (image, context.Server.MapPath ("~ / images/201292891051540.jpg")) .Save (MStream1, System.Drawing.Imaging.ImageFormat.Png); context.Response.ClearContent (); context.Response.ContentType = "image/png"; context.Response.BinaryWrite (MStream1.ToArray ()); / / image.Dispose (); MStream.Dispose (); MStream1.Dispose ();} context.Response.Flush () Context.Response.End ();} / merge the two pictures after calling this function, similar to a photo album, with a / background image pasted with your own target picture / pasted source picture / pasted target picture public static Image CombinImage (Image imgBack, string destImg) {Image img = Image.FromFile (destImg) / / if (img.Height! = 65 | | img.Width! = 65) {img = KiResizeImage (img, 65, 65, 0);} Graphics g = Graphics.FromImage (imgBack); g.DrawImage (imgBack, 0,0, imgBack.Width, imgBack.Height); / / g.DrawImage (imgBack, 0,0, frame width, frame height) / / g.FillRectangle (System.Drawing.Brushes.White, imgBack.Width / 2-img.Width / 2-1, imgBack.Width / 2-img.Width / 2-1); / / A black border around the photo / / g.DrawImage (img, the left margin between the photo and the frame, the top margin between the photo and the frame, width, height) G.DrawImage (img, imgBack.Width / 2-img.Width / 2, imgBack.Width / 2-img.Width / 2, img.Width, img.Height); GC.Collect (); return imgBack } / Resize picture / original Bitmap / new width / / new height / / retained, temporarily not used / to process the later picture public static Image KiResizeImage (Image bmp, int newW, int newH, int Mode) {try {Image b = new Bitmap (newW, newH); Graphics g = Graphics.FromImage (b) / / quality of interpolation algorithm g.InterpolationMode = InterpolationMode.HighQualityBicubic; g.DrawImage (bmp, new Rectangle (0,0, newW, newH), new Rectangle (0,0, bmp.Width, bmp.Height), GraphicsUnit.Pixel); g.Dispose (); return b;} catch {return null;}} public bool IsReusable {get {return false Thank you for your reading! This is the end of this article on "how asp.net uses QRCode to generate a QR code for a picture center plus Logo or image". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it out for more people to see!

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