如何在ASP .NET中掃描QR碼

using System.ComponentModel.DataAnnotations;
namespace IronQRScannerAsp.Models
{
    public class QRCodeModel
    {
        [Display(Name = "Select QR Image")]
        public IFormFile QRCodeImage
        {
            get;
            set;
        }
    }
}

Imports System.ComponentModel.DataAnnotations
Namespace IronQRScannerAsp.Models
	Public Class QRCodeModel
		<Display(Name := "Select QR Image")>
		Public Property QRCodeImage() As IFormFile
	End Class
End Namespace

using IronQr;
using IronQRScannerAsp.Models;
using IronSoftware.Drawing;
using Microsoft.AspNetCore.Mvc;
namespace IronQRScannerAsp.Controllers
{
    public class QrCodeController : Controller
    {
        private readonly IWebHostEnvironment _environment;
        public QrCodeController(IWebHostEnvironment environment)
        {
            _environment = environment;
        }
        public IActionResult Index()
        {
          ViewBag.QrCodeText = "Text";
          return View();
        }
        [HttpPost]
        public IActionResult ScanQRCode(QRCodeModel qrImage)
        {
            string path = Path.Combine(_environment.WebRootPath, "ScanQRCode");
            if (!Directory.Exists(path))
            {
                Directory.CreateDirectory(path);
            }
            string filePath = Path.Combine(_environment.WebRootPath, "ScanQRCode/qrcode.png");
            using (var stream = System.IO.File.Create(filePath))
            {
                qrImage.QRCodeImage.CopyTo(stream);
            }
            // 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 an get all embedded QR Codes
            IEnumerable<QrResult> results = reader.Read(imageInput);
            ViewBag.QrCodeText = results.First().Value;
            string imageUrl = $"{this.Request.Scheme}://{this.Request.Host}{this.Request.PathBase}" + "/ScanQRCode/qrcode.png";
            ViewBag.QrCodeUri = imageUrl;
          return View();
        }
    }
}

Imports IronQr
Imports IronQRScannerAsp.Models
Imports IronSoftware.Drawing
Imports Microsoft.AspNetCore.Mvc
Namespace IronQRScannerAsp.Controllers
	Public Class QrCodeController
		Inherits Controller

		Private ReadOnly _environment As IWebHostEnvironment
		Public Sub New(ByVal environment As IWebHostEnvironment)
			_environment = environment
		End Sub
		Public Function Index() As IActionResult
		  ViewBag.QrCodeText = "Text"
		  Return View()
		End Function
		<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
			Dim filePath As String = System.IO.Path.Combine(_environment.WebRootPath, "ScanQRCode/qrcode.png")
			Using stream = System.IO.File.Create(filePath)
				qrImage.QRCodeImage.CopyTo(stream)
			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 an get all embedded QR Codes
			Dim results As IEnumerable(Of QrResult) = reader.Read(imageInput)
			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

@model IronQRScannerAsp.Models.QRCodeModel
@{
    ViewData["Title"] = "ScanQRCode";
}
<h1>ScanQRCode</h1>
<h4>QRCodeModel</h4>
<hr />
<div class="row">
    <div class="col-md-14">
        <form asp-action="ScanQRCode" enctype="multipart/form-data">
            <div asp-validation-summary="ModelOnly" class="text-danger"></div>
            <div class="form-group">
            </div>
            <div class="form-group">
                <h3>Scanned Text:</h3>
                <h4>@ViewBag.QrCodeText</h4>
            </div>
            <div class="form-group">
                <img src="@ViewBag.QrCodeUri" class="img-thumbnail" />
            </div>
        </form>
    </div>
</div>
<div>
    <a asp-action="Index">Clear</a>
</div>
@section Scripts {
    @{
        await Html.RenderPartialAsync("_ValidationScriptsPartial");
    }
}

model ReadOnly Property () As IronQRScannerAsp.Models.QRCodeModel
	ViewData("Title") = "ScanQRCode"
End Property
'INSTANT VB WARNING: An assignment within expression was extracted from the following statement:
'ORIGINAL LINE: <h1> ScanQRCode</h1> <h4> QRCodeModel</h4> <hr /> <div class="row"> <div class="col-md-14"> <form asp-action="ScanQRCode" enctype="multipart/form-data"> <div asp-validation-summary="ModelOnly" class="text-danger"></div> <div class="form-group"> </div> <div class="form-group"> <h3> Scanned Text:</h3> <h4> @ViewBag.QrCodeText</h4> </div> <div class="form-group"> <img src="@ViewBag.QrCodeUri" class="img-thumbnail" /> </div> </form> </div> </div> <div> <a asp-action="Index"> Clear</a> </div> @section Scripts
"form-group"> </div> <div class="form-group"> (Of h3) Scanned Text
	Inherits </h3>(Of h4) ViewBag.QrCodeText</h4> </div> <div class="form-group"> <img src="@ViewBag.QrCodeUri" class="img-thumbnail" /> </div> </form> </div> </div> (Of div) <a asp-action="Index"> Clear</a> </div> section Scripts

'INSTANT VB WARNING: An assignment within expression was extracted from the following statement:
'ORIGINAL LINE: Friend <h1> ScanQRCode</h1> <h4> QRCodeModel</h4> <hr /> <div Class="row"> <div class="col-md-14"> <form asp-action="ScanQRCode" enctype="multipart/form-data"> <div asp-validation-summary="ModelOnly" class="text-danger"></div> <div class="form-group"> </div> <div class
"text-danger"></div> <div class="form-group"> </div> <div class
'INSTANT VB WARNING: An assignment within expression was extracted from the following statement:
'ORIGINAL LINE: Private Friend <h1> ScanQRCode</h1> <h4> QRCodeModel</h4> <hr /> <div Class="row"> <div class="col-md-14"> <form asp-action="ScanQRCode" enctype="multipart/form-data"> <div asp-validation-summary="ModelOnly" class="text-danger"></div> <div class
"ModelOnly" class="text-danger"></div> <div class
'INSTANT VB WARNING: An assignment within expression was extracted from the following statement:
'ORIGINAL LINE: Private Private Friend <h1> ScanQRCode</h1> <h4> QRCodeModel</h4> <hr /> <div Class="row"> <div class="col-md-14"> <form asp-action="ScanQRCode" enctype="multipart/form-data"> <div asp-validation-summary="ModelOnly" class
"multipart/form-data"> <div asp-validation-summary="ModelOnly" class
'INSTANT VB WARNING: An assignment within expression was extracted from the following statement:
'ORIGINAL LINE: Private Private Private Friend <h1> ScanQRCode</h1> <h4> QRCodeModel</h4> <hr /> <div Class="row"> <div class="col-md-14"> <form asp-action="ScanQRCode" enctype="multipart/form-data"> <div asp-validation-summary
"ScanQRCode" enctype="multipart/form-data"> <div asp-validation-summary
'INSTANT VB WARNING: An assignment within expression was extracted from the following statement:
'ORIGINAL LINE: Private Private Private Private Friend <h1> ScanQRCode</h1> <h4> QRCodeModel</h4> <hr /> <div Class="row"> <div class="col-md-14"> <form asp-action="ScanQRCode" enctype
"col-md-14"> <form asp-action="ScanQRCode" enctype
'INSTANT VB WARNING: An assignment within expression was extracted from the following statement:
'ORIGINAL LINE: Private Private Private Private Private Friend <h1> ScanQRCode</h1> <h4> QRCodeModel</h4> <hr /> <div Class="row"> <div class="col-md-14"> <form asp-action
"row"> <div class="col-md-14"> <form asp-action
'INSTANT VB WARNING: Instant VB cannot determine whether both operands of this division are integer types - if they are then you should use the VB integer division operator:
Private Private Private Private Private Private Private Friend (Of h1) ScanQRCode</h1> (Of h4) QRCodeModel</h4> <hr /> <div Class="row"> <div class
	@
	If True Then
		Await Html.RenderPartialAsync("_ValidationScriptsPartial")
	End If
End Class

app.MapControllerRoute(
name: "default",
pattern: "{controller=QrCode}/{action=Index}");

app.MapControllerRoute(name:= "default", pattern:= "{controller=QrCode}/{action=Index}")

using IronQr;
using IronSoftware.Drawing;
using IronQr.Enum;
using System.Collections.Generic;
var inputBmp = AnyBitmap.FromFile("QrImage.png");
// Use Auto => Machine Learning Scan
// Careful Scan => Useful for scanning documents slowly and carefully
QrImageInput scan_ML_and_normal = new QrImageInput(inputBmp, QrScanMode.OnlyDetectionModel);
IEnumerable<QrResult> results1 = new QrReader().Read(scan_ML_and_normal);
// Use Machine Learning Scan
// High Speed => For scanning frames from a camera
QrImageInput scan_ML_only = new QrImageInput(inputBmp, QrScanMode.OnlyDetectionModel);
IEnumerable<QrResult> results2 = new QrReader().Read(scan_ML_only);
// Use Scan without Machine Learning
QrImageInput scan_normal_only = new QrImageInput(inputBmp, QrScanMode.OnlyBasicScan);
IEnumerable<QrResult> results3 = new QrReader().Read(scan_normal_only);

Imports IronQr
Imports IronSoftware.Drawing
Imports IronQr.Enum
Imports System.Collections.Generic
Private inputBmp = AnyBitmap.FromFile("QrImage.png")
' Use Auto => Machine Learning Scan
' Careful Scan => Useful for scanning documents slowly and carefully
Private scan_ML_and_normal As New QrImageInput(inputBmp, QrScanMode.OnlyDetectionModel)
Private results1 As IEnumerable(Of QrResult) = (New QrReader()).Read(scan_ML_and_normal)
' Use Machine Learning Scan
' High Speed => For scanning frames from a camera
Private scan_ML_only As New QrImageInput(inputBmp, QrScanMode.OnlyDetectionModel)
Private results2 As IEnumerable(Of QrResult) = (New QrReader()).Read(scan_ML_only)
' Use Scan without Machine Learning
Private scan_normal_only As New QrImageInput(inputBmp, QrScanMode.OnlyBasicScan)
Private results3 As IEnumerable(Of QrResult) = (New QrReader()).Read(scan_normal_only)