C # generates and displays a two-dimensional code

ref https://jingyan.baidu.com/article/fb48e8bef1ebab6e622e1409.html

1. Visual Studio> right-click the project name> Manage NuGet Packages ...> Search Spire.Barcode and install it. The current version is v3.5.0, VS using a VS Community 2017 Version 15.9.12

Add the following code within the function 2. Program.cs Main, generated QR Code:

. 1  the using Spire.Barcode;
 2  the using the System.Drawing;
 . 3  
. 4          static  void the Main ( String [] args)
 . 5          {
 . 6  
. 7              // Create BarcodeSettings objects 
. 8              BarcodeSettings Settings = new new BarcodeSettings ();         
 . 9  
10              // set to two barcode types dimensional code 
. 11              settings.Type = BarCodeType.QRCode;
 12 is  
13 is              // set two-dimensional code data 
14              settings.Data = " 123456789 " ;
 15 
16              // set the display text 
. 17              settings.Data2D = " 123456789 " ;
 18 is  
. 19              // Set digital data type 
20 is              settings.QRCodeDataMode = QRCodeDataMode.Numeric;
 21 is  
22 is              // set the error correction code is a two-dimensional level 
23 is              settings.QRCodeECL = QRCodeECL .H;
 24  
25              // set the width 
26 is              settings.X = 3.0f ;
 27  
28              // instantiate an object of class BarCodeGenerator 
29              BarCodeGenerator = Generator new new BarCodeGenerator (settings);
30  
31 is              // generate two-dimensional code image and save it as a PNG format 
32              Image Image = generator.GenerateImage ();
 33 is              Image.Save ( " QRCode.png " ); // Not mandatory

3. Form1.cs, the parameters passed to the generated image to be displayed Form

        public Form1(Image image) // add args image
        {
            InitializeComponent(image); // parse image to form

4. Form1.Designer.cs, for displaying a two-dimensional code added pictureBox

using System.Drawing; // add name space if report error

        private void InitializeComponent(Image image) // parse image

            this.pictureBox1.Image = image; // show QRCode

            the this .pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.AutoSize; // the AutoSize pictureBox automatically extended according to the size of the image