Hello!
Do not ask me why, but now is a time of the day where I have to read a QR code from a Web browser. As I’m obviously not the first nor the last in this need, the first BING search leads me to a great JS library: DWA012 / html5-qrcode .
And from here it is simpler than anyone else
1. Create an ASP.Net WEB API project (just to test)
2. Add the JS and the load of the same on BundleConfig.cs
3. Add the following code to the Index.cshtml page
1: @{
2: ViewBag.Title = "El Bruno - QR Reader";
3: }
4: <div class="row">
5: <div class="col-md-12">
6: <h2>QR Code</h2>
7: <div id="reader" style="width:300px;height:250px">
8: </div>
9: <h6>Result</h6>
10: <span id="read" class="center"></span>
11: <br>
12: </div>
13: </div>
14:
15: @section scripts {
16: <!--Script references. -->
17: <script>
1:
2: $(document).ready(function () {
3: $('#reader').html5_qrcode(function (data) {
4: alert(data);
5: },
6: function (error) {
7: console.log(error);
8: }, function (videoError) {
9: console.log(videoError);
10: }
11: );
12: });
13:
</script>
18: }
4. Run the app and ready!
As always a video to make it better
And the download of the code already… well better code this your self 
Download: https://github.com/dwa012/html5-qrcode
Greetings @ La Finca
El Bruno
El Bruno 
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