Step by step Create QR Code with QrCodeNet
Step.1 新建項目
Step.2 下載QrCodeNet代碼,解壓QrCodeNetsourceCodeqrcodenetGma.QrCodeNet ugetlib et45Gma.QrCodeNet.Encoding.dll
Step.3 加入參考(引用)
Step.4 在窗口中拖入一個Button
Step.5 添中 Imports
Imports Gma.QrCodeNet.Encoding Imports Gma.QrCodeNet.Encoding.Windows.Render Imports System.IO
Step.6 粘貼代碼

1 Public Class Form1 : Inherits Form 2 3 ' // 定義常量 4 Public Const str = "160-12345678-8888,AbcdefgHijklmnOpqRst,2018/05/22.160-12345678-8888,AbcdefgHijklmnOpqRst,2018/05/22." 5 6 ' // 重寫 OnPaint 方法,增加繪制二維碼方法調用 7 Protected Overrides Sub OnPaint(e As PaintEventArgs) 8 MyBase.OnPaint(e) 9 10 ' // 繪制二維碼 11 Call ShowQrCode(e.Graphics) 12 13 tbStrContent.Text = str 14 15 End Sub 16 17 ' // Save File 按鈕事件 18 Private Sub btnSaveFile_Click(sender As Object, e As EventArgs) Handles btnSaveFile.Click 19 20 Const moduleSizeInPixels = 4 21 22 Dim qrEncoder As New QrEncoder(ErrorCorrectionLevel.L) 23 Dim qrCode As New QrCode() 24 25 Dim moduleSize As New FixedModuleSize(moduleSizeInPixels, QuietZoneModules.Two) 26 Dim render As New GraphicsRenderer(moduleSize, Brushes.Black, Brushes.White) 27 28 Dim fileName As String = Application.ExecutablePath + "_One.png" 29 30 ' // 錯誤繼續執行 31 On Error Resume Next 32 33 ' // 根據字符串生成 QR Code 34 qrEncoder.TryEncode(str, qrCode) 35 36 ' // 寫入文件 37 Using stream As New FileStream(fileName, FileMode.Create) 38 render.WriteToStream(qrCode.Matrix, System.Drawing.Imaging.ImageFormat.Png, stream) 39 End Using 40 41 End Sub 42 43 ' // 繪制二維碼 44 Private Sub ShowQrCode(g As Graphics) 45 Dim qrEncoder As New QrEncoder(ErrorCorrectionLevel.L) 46 Dim qrCode As New QrCode() 47 48 Dim moduleSize As New FixedModuleSize(2, QuietZoneModules.Two) 49 Dim render As New GraphicsRenderer(moduleSize, Brushes.Black, Brushes.White) 50 51 ' // 根據字符串生成 QR Code 52 qrCode = qrEncoder.Encode(str) 53 54 ' // 描繪 QR Code 55 render.Draw(g, qrCode.Matrix) 56 57 End Sub 58 59 End Class
Step.7 運行結果
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參考資料:
QR Code
http://www.qrcode.com/zh/about/
C#利用QrCode.Net生成二维码(Qr码)
https://www.cnblogs.com/tianma3798/p/4054270.html
利用QrCode.Net生成二维码 asp.net mvc c#
https://blog.csdn.net/paolei/article/details/12584295
草料二维码
https://cli.im/
VB.Net创建和调用DLL教程
https://blog.csdn.net/namecgc/article/details/77940698