C # implements two-dimensional code functions, WinForm and ASP.

QR code now uses a lot, how to use C # programming to generate it?

Prepare ThoughtWorks.QRCode.dll

Requires a class QRCode, which is specifically designed to generate two-dimensional code

usingSystem;usingSystem.Collections.Generic;usingSystem.Drawing;usingSystem.Linq;usingSystem.Text;usingSystem.Threading.Tasks;usingThoughtworks.qrcode;usingThoughtWorks.QRCode.Codec;namespaceqrcodepro{ Public classQRCode {///generate two-dimensional code/// </summary>        /// <param name= "Strdata" >the text or number to be generated</param>        /// <param name= "qrencoding" >Three sizes: BYTE, Alpha_numeric,numeric</param>        /// <param name= "level" >size: L M Q H</param>        /// <param name= "version" >version: if 8</param>        /// <param name= "scale" >scale: If 4</param>        /// <returns></returns>         Public StaticImage Createcode_choose (stringStrdata,stringQrencoding,stringSizeintVersionintScale ) {Qrcodeencoder Qrcodeencoder=NewQrcodeencoder (); stringencoding =qrencoding; Switch(encoding) { Case "Byte": Qrcodeencoder.qrcodeencodemode=Qrcodeencoder.encode_mode.                    BYTE;  Break;  Case "alphanumeric": Qrcodeencoder.qrcodeencodemode=Qrcodeencoder.encode_mode.                    Alpha_numeric;  Break;  Case "Numeric": Qrcodeencoder.qrcodeencodemode=Qrcodeencoder.encode_mode.                    NUMERIC;  Break; default: Qrcodeencoder.qrcodeencodemode=Qrcodeencoder.encode_mode.                    BYTE;  Break; } Qrcodeencoder.qrcodescale=Scale ; Qrcodeencoder.qrcodeversion=version; Switch(size) { Case "L": Qrcodeencoder.qrcodeerrorcorrect=qrcodeencoder.error_correction.                    L  Break;  Case "M": Qrcodeencoder.qrcodeerrorcorrect=qrcodeencoder.error_correction.                    M  Break;  Case "Q": Qrcodeencoder.qrcodeerrorcorrect=qrcodeencoder.error_correction.                    Q;  Break; default: Qrcodeencoder.qrcodeerrorcorrect=qrcodeencoder.error_correction.                    H  Break; }            //text Generation PicturesImage image =Qrcodeencoder.encode (strdata); returnimage; }    }}

Create a new form in VS, build the form:

Code required in the main form

usingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.IO;usingSystem.Linq;usingSystem.Text;usingSystem.Threading.Tasks;usingSystem.Windows.Forms;namespaceqrcodepro{ Public Partial classForm1:form { PublicForm1 () {InitializeComponent (); }        Private voidForm1_Load (Objectsender, EventArgs e) {CBOENCODING.ITEMS.ADD ("Byte"); CBOENCODING.ITEMS.ADD ("alphanumeric"); CBOENCODING.ITEMS.ADD ("Numeric"); Cboencoding.selectedindex=0; //Fill Size drop-down boxCBOSIZE.ITEMS.ADD ("M"); CBOSIZE.ITEMS.ADD ("L"); CBOSIZE.ITEMS.ADD ("Q"); CBOSIZE.ITEMS.ADD ("H"); Cbosize.selectedindex=0; //Fill text BoxTxtversion.text ="8"; Txtscale.text="4"; }        Private voidBtncreatecode_click (Objectsender, EventArgs e) {            stringContent =Txtcontent.text; intVersion =Convert.ToInt32 (Txtversion.text); intScale =Convert.ToInt32 (Txtscale.text); stringSize =cboSize.SelectedItem.ToString (); stringencoding =cboEncoding.SelectedItem.ToString (); //check null value string            if(Content = =NULL|| Content = ="") {MessageBox.Show ("Please input QR code information, support Chinese"); }            Else{Image img=qrcode.createcode_choose (content, encoding, size, version, scale); Piccode.image=img; }        }        Private voidBtnreset_click (Objectsender, EventArgs e) {Txtcontent.text=""; }        Private voidBtnsave_click (Objectsender, EventArgs e) {            if(Piccode.image! =NULL) {saveimages (Piccode); }            Else{MessageBox.Show ("We haven't generated the image yet! "); }        }        Private voidsaveimages (PictureBox pic) {stringParentpath =@"D:\Photo"; //number of milliseconds since January 1, 1970 00:00:00 GMT            stringfilename =DateTime.Now.Ticks.ToString (); if(Parentpath.substring (Parentpath.length-1,1) !=@"\") Parentpath= Parentpath +@"\"; stringChildpath = Parentpath + DateTime.Now.ToString ("YYYYMMDD"); if(!directory.exists (Childpath))            Directory.CreateDirectory (Childpath); Pic. Image.Save (Childpath+"\\"+ filename +". jpg", System.Drawing.Imaging.ImageFormat.Jpeg); MessageBox.Show ("Save success! "); }    }}

The effect of the implementation

Keep files

Porting this project to an ASP. NET site is also extremely straightforward and is no longer demonstrated here.

C # implements two-dimensional code functions, WinForm and ASP.