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Correct return channel to .NET for errors #18

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merged 3 commits into from
May 27, 2021
Merged

Correct return channel to .NET for errors #18

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5fc4f58
Correct wiring error handling wiring
May 26, 2021
ea89688
Remove debug outputs
May 26, 2021
109856a
Corrected typo
uniederer May 26, 2021
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8 changes: 8 additions & 0 deletions BlazorBarcodeScanner.ZXing.JS/JsInteropClass.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,14 @@ public static void ReceiveBarcode(string barcodeText)
BarcodeReaderInterop.OnBarcodeReceived(barcodeText);
}

[JSInvokable]
public static void ReceiveError(object error)
{
// What to do with the knowledge that an error happened?
// Looking at current examples this might indicate issues with one of the decoders
// (namely BrowserQRCodeReader appears to throw errors occasionally...)
}

[JSInvokable]
public static void ReceiveNotFound()
{
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4 changes: 1 addition & 3 deletions BlazorBarcodeScanner.ZXing.JS/wwwroot/BlazorBarcodeScanner.js
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Original file line number Diff line number Diff line change
Expand Up @@ -96,7 +96,6 @@ window.BlazorBarcodeScanner = {
console.log("Starting decoding with " + videoConstraints);
await this.codeReader.decodeFromConstraints({ video: videoConstraints }, video, (result, err) => {
if (result) {
console.log(result);
if (this.lastPictureDecodedFormat) {
this.lastPictureDecoded = this.codeReader.captureCanvas.toDataURL(this.lastPictureDecodedFormat);
}
Expand All @@ -106,8 +105,7 @@ window.BlazorBarcodeScanner = {
});
}
if (err && !(err instanceof ZXing.NotFoundException)) {
console.error(err);
DotNet.invokeMethodAsync('BlazorBarcodeScanner.ZXing.JS', 'ReceiveBarcode', err)
DotNet.invokeMethodAsync('BlazorBarcodeScanner.ZXing.JS', 'ReceiveError', err)
.then(message => {
console.log(message);
});
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