ASP. NET generates a QR code, asp.net

ASP. NET generates a QR code, asp.net

The following uses the class library ThoughtWorks. QRCode. dll to generate a QR code.

 

Add the following three namespaces for use:

 

Using ThoughtWorks. QRCode. Codec;

Using ThoughtWorks. QRCode. Codec. Data;

Using ThoughtWorks. QRCode. Codec. Util;

 

The following code is mainly used in asp.net to generate a QR code image, which is displayed on the webpage and saved in D: \ zlf \ zz. Png;

 

C # code Replication

Using System; using System. configuration; using System. data; using System. linq; using System. web; using System. web. security; using System. web. UI; using System. web. UI. htmlControls; using System. web. UI. webControls; using System. web. UI. webControls. webParts; using System. xml. linq; using System. drawing. imaging; using ThoughtWorks. QRCode. codec; using ThoughtWorks. QRCode. codec. data; using ThoughtWorks. QRCode. codec. util; Using System. IO; using System. text; public partial class _ Default: System. web. UI. page {protected void Page_Load (object sender, EventArgs e) {} protected void button#click (object sender, EventArgs e) {response QRCodeEncoder = new qrCodeEncoder (); QRCodeEncoder. QRCodeEncodeMode = QRCodeEncoder. ENCODE_MODE.BYTE; qrCodeEncoder. QRCodeScale = 4; qrCodeEncoder. QRCodeVersion = 8; qrCodeEncoder. QR CodeErrorCorrect = QRCodeEncoder. ERROR_CORRECTION.M; // String data = "Hello QR code! "; String data = TextBox1.Text. toString (); Response. write (data); System. drawing. bitmap image = qrCodeEncoder. encode (data); System. IO. memoryStream MStream = new System. IO. memoryStream (); image. save (MStream, System. drawing. imaging. imageFormat. png); Response. clearContent (); Response. contentType = "image/Png"; Response. binaryWrite (MStream. toArray (); // FileInfo f = new FileInfo (@ "d: \ zl.png"); Director Y. CreateDirectory ("d :\\\ zlf"); FileStream fs = new FileStream ("d :\\\ zlf \\\\ zz. Png ", FileMode. createNew, FileAccess. readWrite); BinaryWriter bw = new BinaryWriter (fs, UTF8Encoding. UTF8); byte [] by = MStream. toArray (); for (int I = 0; I <MStream. toArray (). length; I ++) bw. write (by [I]); fs. close ();}}

 

Aspx page code

HTML code Replication

<% @ Page Language = "C #" AutoEventWireup = "true" CodeFile = "Default. aspx. cs "Inherits =" _ Default "%> 

Aspnet (ThoughtWorksQRCodedll) QR code
Qre. QRCodeEncodeMode = QRCodeEncoder. ENCODE_MODE.BYTE; // For details

This indicates a encoding method.
Qre. QRCodeScale = 4; // detailed description
Qre. QRCodeVersion = 8; // detailed description
What are the version numbers and numbers. You can change the number. The size of the generated image will be different.
Qre. QRCodeErrorCorrect = QRCodeEncoder. ERROR_CORRECTION.H; // For details

This is the level of the Failover rate. . H. M or something. Controllable
You probably know what this means. Let me give you a detailed answer, and I am also powerless to use it after all. That's not to say we need to thoroughly study it.

How to generate a QR code aspnet
Reference
Qrcodenet.codeplex.com/