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C#生成二维码
引用thoughtworks.qrcode.dll
1、不带图片
1 using System; 2 using System.Collections.Generic; 3 using System.Drawing; 4 using System.Linq; 5 using System.Text; 6 using System.Web; 7 using System.Web.UI; 8 using System.Web.UI.WebControls; 9 using ThoughtWorks.QRCode.Codec; 10 11 namespace makeQrcode 12 { 13 public partial class WebForm1 : System.Web.UI.Page 14 { 15 protected void Page_Load(object sender, EventArgs e) 16 { 17 18 } 19 20 protected void createQrCode_Click(object sender, EventArgs e) 21 { 22 createQrCode(this.codeInfo.Text); 23 } 24 25 private void createQrCode(string text) 26 { 27 Bitmap bt; 28 string enCodeString = text; 29 QRCodeEncoder qrCodeEncoder = new QRCodeEncoder(); 30 //bt = qrCodeEncoder.Encode(enCodeString, Encoding.UTF8); 31 bt = qrCodeEncoder.Encode(enCodeString); 32 string filename = string.Format(DateTime.Now.ToString(), "yyyymmddhhmmss"); 33 filename = filename.Replace(" ", ""); 34 filename = filename.Replace(":", ""); 35 filename = filename.Replace("-", ""); 36 filename = filename.Replace(".", ""); 37 bt.Save(Server.MapPath("~/image/") + filename + ".jpg"); 38 this.qrCodeImage.ImageUrl = "~/image/" + filename + ".jpg"; 39 } 40 41 } 42 }
2、带图片
1 using System; 2 using System.Collections.Generic; 3 using System.Drawing; 4 using System.Drawing.Drawing2D; 5 using System.Drawing.Imaging; 6 using System.IO; 7 using System.Linq; 8 using System.Web; 9 using ThoughtWorks.QRCode.Codec; 10 11 namespace QRCode.QRCode 12 { 13 /// <summary> 14 /// qrcodeImg 的摘要说明 15 /// </summary> 16 public class qrcodeImg : IHttpHandler 17 { 18 public bool IsReusable 19 { 20 get 21 { 22 return false; 23 } 24 } 25 26 public void ProcessRequest(HttpContext context) 27 { 28 //context.Response.ContentType = "text/plain"; 29 //context.Response.Write("Hello World"); 30 string text = context.Request["CodeText"]; 31 string text2 = context.Request["img"]; 32 if (text2 == "" || text2 == null) 33 { 34 text2 = "../images/wm.png"; 35 } 36 if (!string.IsNullOrEmpty(text)) 37 { 38 QRCodeEncoder qRCodeEncoder = new QRCodeEncoder(); 39 //qRCodeEncoder.set_QRCodeEncodeMode(2); 40 //qRCodeEncoder.set_QRCodeScale(4); 41 //qRCodeEncoder.set_QRCodeVersion(8); 42 //qRCodeEncoder.set_QRCodeErrorCorrect(1); 43 qRCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE; 44 qRCodeEncoder.QRCodeScale = 4; 45 qRCodeEncoder.QRCodeVersion = 8; 46 qRCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M; 47 System.Drawing.Image image = qRCodeEncoder.Encode(text); 48 MemoryStream memoryStream = new MemoryStream(); 49 image.Save(memoryStream, System.Drawing.Imaging.ImageFormat.Png); 50 MemoryStream memoryStream2 = new MemoryStream(); 51 CombinImage(image, context.Server.MapPath(text2)).Save(memoryStream2, System.Drawing.Imaging.ImageFormat.Png); 52 context.Response.ClearContent(); 53 context.Response.ContentType = "image/png"; 54 context.Response.BinaryWrite(memoryStream2.ToArray()); 55 memoryStream.Dispose(); 56 memoryStream2.Dispose(); 57 } 58 context.Response.Flush(); 59 context.Response.End(); 60 } 61 public static System.Drawing.Image CombinImage(System.Drawing.Image imgBack, string destImg) 62 { 63 System.Drawing.Image image = System.Drawing.Image.FromFile(destImg); 64 if (image.Height != 65 || image.Width != 65) 65 { 66 image = KiResizeImage(image, 65, 65, 0); 67 } 68 System.Drawing.Graphics graphics = System.Drawing.Graphics.FromImage(imgBack); 69 graphics.DrawImage(imgBack, 0, 0, imgBack.Width, imgBack.Height); 70 graphics.DrawImage(image, imgBack.Width / 2 - image.Width / 2, imgBack.Width / 2 - image.Width / 2, image.Width, image.Height); 71 GC.Collect(); 72 return imgBack; 73 } 74 public static System.Drawing.Image KiResizeImage(System.Drawing.Image bmp, int newW, int newH, int Mode) 75 { 76 System.Drawing.Image result; 77 try 78 { 79 System.Drawing.Image image = new System.Drawing.Bitmap(newW, newH); 80 System.Drawing.Graphics graphics = System.Drawing.Graphics.FromImage(image); 81 graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic; 82 graphics.DrawImage(bmp, new System.Drawing.Rectangle(0, 0, newW, newH), new System.Drawing.Rectangle(0, 0, bmp.Width, bmp.Height), System.Drawing.GraphicsUnit.Pixel); 83 graphics.Dispose(); 84 result = image; 85 } 86 catch 87 { 88 result = null; 89 } 90 return result; 91 } 92 93 } 94 }
前端调用（一个简单的下载页面）：
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 5 <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=0.5, maximum-scale=2.0, user-scalable=yes" /> 6 <title>下载</title> 7 <style type="text/css"> 8 body 9 { 10 margin: 0; 11 padding: 0; 12 color: #333333; 13 font-family: "微软雅黑"; 14 background: #f0f0f0; 15 } 16 .clear 17 { 18 clear: both; 19 } 20 .layout 21 { 22 width: 100%; 23 background: #3d3f40; 24 border-bottom: 1px solid #cccccc; 25 } 26 .layout .logo 27 { 28 max-width: 960px; 29 height: 86px; 30 margin: 0 auto; 31 background: url(../images/plat_logo.png) 10px center no-repeat; 32 } 33 .center 34 { 35 background: #ffffff; 36 border-top: 1px solid #222222; 37 } 38 .center .con 39 { 40 max-width: 960px; 41 margin: 0 auto; 42 padding: 40px 0; 43 } 44 .btn 45 { 46 width: 30%; 47 margin-left: 10px; 48 min-width: 296px; 49 float: left; 50 padding: 5px 5px; 51 text-align: center; 52 } 53 .btn a.ios 54 { 55 height: 200px; 56 display: block; 57 background: #4691dc url(../images/ios.png) center center no-repeat; 58 margin: 0 auto; 59 } 60 .btn a.android 61 { 62 height: 200px; 63 display: block; 64 background: #a4c63e url(../images/android.png) center center no-repeat; 65 margin: 0 auto; 66 } 67 </style> 68 </head> 69 <body> 70 <div class="layout"> 71 <div class="logo"> 72 </div> 73 <div class="center"> 74 <div class="con"> 75 <div class="btn"> 76 <a id="iphoneLink" href="#" class="ios"></a> 77 </div> 78 <div class="btn"> 79 <a href="#" class="android"></a> 80 </div> 81 <div class="btn"> 82 <img id="QrCodeImg" alt="" src="" /> 83 </div> 84 <div class="clear"> 85 </div> 86 </div> 87 </div> 88 </div> 89 <script type="text/javascript"> 90 91 var hostname = location.hostname; 92 var port = location.port; 93 var page = "http://" + hostname + ":" + port + "/QRCode/install.html"; 94 95 document.getElementById("QrCodeImg").src = "qrcodeImg.ashx?CodeText=" + page; 96 </script> 97 </body> 98 </html>
C#生成二维码
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