如何在 ASP .NET 中扫描 QR 代码

// Import necessary namespaces
using System.ComponentModel.DataAnnotations;

namespace IronQRScannerAsp.Models
{
    public class QRCodeModel
    {
        // Property to hold the uploaded QR code image
        [Display(Name = "Select QR Image")]
        public IFormFile QRCodeImage { get; set; }
    }
}

' Import necessary namespaces
Imports System.ComponentModel.DataAnnotations

Namespace IronQRScannerAsp.Models
	Public Class QRCodeModel
		' Property to hold the uploaded QR code image
		<Display(Name := "Select QR Image")>
		Public Property QRCodeImage() As IFormFile
	End Class
End Namespace

// Import necessary namespaces
using IronQr;
using IronQRScannerAsp.Models;
using IronSoftware.Drawing;
using Microsoft.AspNetCore.Mvc;

namespace IronQRScannerAsp.Controllers
{
    // Controller to handle QR code scanning functionalities
    public class QrCodeController : Controller
    {
        private readonly IWebHostEnvironment _environment;

        // Constructor for dependency injection of the hosting environment
        public QrCodeController(IWebHostEnvironment environment)
        {
            _environment = environment;
        }

        // Displays the initial View
        public IActionResult Index()
        {
            ViewBag.QrCodeText = "Text";
            return View();
        }

        // Handles the POST request to scan a QR code
        [HttpPost]
        public IActionResult ScanQRCode(QRCodeModel qrImage)
        {
            string path = Path.Combine(_environment.WebRootPath, "ScanQRCode");
            if (!Directory.Exists(path))
            {
                Directory.CreateDirectory(path);
            }

            // Define the file path for saving the uploaded QR image
            string filePath = Path.Combine(_environment.WebRootPath, "ScanQRCode/qrcode.png");
            using (var stream = System.IO.File.Create(filePath))
            {
                qrImage.QRCodeImage.CopyTo(stream); // Save uploaded image to server
            }

            // Open the asset to read a QR Code from
            var bitmap = AnyBitmap.FromFile(filePath);

            // Load the asset into QrImageInput
            QrImageInput imageInput = new QrImageInput(bitmap);

            // Create a QR Reader object
            QrReader reader = new QrReader();

            // Read the Input and get all embedded QR Codes
            IEnumerable<QrResult> results = reader.Read(imageInput);

            // Display scanned text and image on the view
            ViewBag.QrCodeText = results.First().Value;
            string imageUrl = $"{this.Request.Scheme}://{this.Request.Host}{this.Request.PathBase}" + "/ScanQRCode/qrcode.png";
            ViewBag.QrCodeUri = imageUrl;

            return View();
        }
    }
}

' Import necessary namespaces
Imports IronQr
Imports IronQRScannerAsp.Models
Imports IronSoftware.Drawing
Imports Microsoft.AspNetCore.Mvc

Namespace IronQRScannerAsp.Controllers
	' Controller to handle QR code scanning functionalities
	Public Class QrCodeController
		Inherits Controller

		Private ReadOnly _environment As IWebHostEnvironment

		' Constructor for dependency injection of the hosting environment
		Public Sub New(ByVal environment As IWebHostEnvironment)
			_environment = environment
		End Sub

		' Displays the initial View
		Public Function Index() As IActionResult
			ViewBag.QrCodeText = "Text"
			Return View()
		End Function

		' Handles the POST request to scan a QR code
		<HttpPost>
		Public Function ScanQRCode(ByVal qrImage As QRCodeModel) As IActionResult
			Dim path As String = System.IO.Path.Combine(_environment.WebRootPath, "ScanQRCode")
			If Not Directory.Exists(path) Then
				Directory.CreateDirectory(path)
			End If

			' Define the file path for saving the uploaded QR image
			Dim filePath As String = System.IO.Path.Combine(_environment.WebRootPath, "ScanQRCode/qrcode.png")
			Using stream = System.IO.File.Create(filePath)
				qrImage.QRCodeImage.CopyTo(stream) ' Save uploaded image to server
			End Using

			' Open the asset to read a QR Code from
			Dim bitmap = AnyBitmap.FromFile(filePath)

			' Load the asset into QrImageInput
			Dim imageInput As New QrImageInput(bitmap)

			' Create a QR Reader object
			Dim reader As New QrReader()

			' Read the Input and get all embedded QR Codes
			Dim results As IEnumerable(Of QrResult) = reader.Read(imageInput)

			' Display scanned text and image on the view
			ViewBag.QrCodeText = results.First().Value
			Dim imageUrl As String = $"{Me.Request.Scheme}://{Me.Request.Host}{Me.Request.PathBase}" & "/ScanQRCode/qrcode.png"
			ViewBag.QrCodeUri = imageUrl

			Return View()
		End Function
	End Class
End Namespace