Set Barcode Source

To perform barcode recognition using the Aspose.BarCode.Cloud SDK for Dart, you need to set the source of the barcode image. Methods of this SDK support loading barcode images from multiple sources, such as file URL, file, and base64 encoded data. This guide provides detailed examples on how to set barcode image source through different API methods.

Supported Barcode Image Formats

JPEG
TIFF
PNG
BMP
GIF

Supported Barcode Source Formats

File URL: Link directly to an image URL.
file: The image file for processing.
Base64 Encoded Image: Convert the image to a base64 encoded string for secure transfer.

Examples for ScanApi

Using GET Request with File URL

import 'dart:io';

import 'package:aspose_barcode_cloud/aspose_barcode_cloud.dart';

Configuration makeConfiguration() {
  final jwtToken = Platform.environment['TEST_CONFIGURATION_ACCESS_TOKEN'];
  if (jwtToken != null) {
    return Configuration(accessToken: jwtToken);
  } else {
    return Configuration(
      clientId: "Client Id from https://dashboard.aspose.cloud/applications",
      clientSecret:
          "Client Secret from https://dashboard.aspose.cloud/applications",
    );
  }
}

Future<void> main() async {
  final config = makeConfiguration();
  final scanApi = ScanApi(ApiClient(config));

  final barcodeImageUrl =
      "https://products.aspose.app/barcode/scan/img/how-to/scan/step2.png";

  final BarcodeResponseList result = await scanApi.scan(barcodeImageUrl);

  if (result.barcodes.isNotEmpty) {
    final barcode = result.barcodes[0];
    print(
        "File '$barcodeImageUrl' recognized, results: value: '${barcode.barcodeValue}', type: ${barcode.type}");
  } else {
    print("File '$barcodeImageUrl' recognized, but no barcodes found.");
  }
}

Using POST Request with Base64 Encoded Image

import 'dart:convert';
import 'dart:io';
import 'package:aspose_barcode_cloud/aspose_barcode_cloud.dart';

Configuration makeConfiguration() {
  final jwtToken = Platform.environment['TEST_CONFIGURATION_ACCESS_TOKEN'];
  if (jwtToken != null) {
    return Configuration(accessToken: jwtToken);
  } else {
    return Configuration(
      clientId: "Client Id from https://dashboard.aspose.cloud/applications",
      clientSecret:
          "Client Secret from https://dashboard.aspose.cloud/applications",
    );
  }
}

Future<void> main() async {
  final config = makeConfiguration();
  final scanApi = ScanApi(ApiClient(config));

  final fileName =
      File("${Directory.current.path}${Platform.pathSeparator}qr.png")
          .absolute
          .path;
  final fileBytes = File(fileName).readAsBytesSync();
  final imageBase64 = base64Encode(fileBytes);

  final scanBase64Request = ScanBase64Request(imageBase64);
  final result = await scanApi.scanBase64(scanBase64Request);

  print(
      "File '$fileName' recognized, result: '${result.barcodes[0].barcodeValue}'");
}

Using POST Request with File Stream

import 'dart:io';

import 'package:aspose_barcode_cloud/aspose_barcode_cloud.dart';

Configuration makeConfiguration() {
  final jwtToken = Platform.environment['TEST_CONFIGURATION_ACCESS_TOKEN'];
  if (jwtToken != null) {
    return Configuration(accessToken: jwtToken);
  } else {
    return Configuration(
      clientId: "Client Id from https://dashboard.aspose.cloud/applications",
      clientSecret:
          "Client Secret from https://dashboard.aspose.cloud/applications",
    );
  }
}

Future<void> main() async {
  final config = makeConfiguration();
  final scanApi = ScanApi(ApiClient(config));

  final file =
      await File("${Directory.current.path}${Platform.pathSeparator}qr.png")
          .readAsBytes();

  final BarcodeResponseList result = await scanApi.scanMultipart(file);

  print("File recognized, result: '${result.barcodes[0].barcodeValue}'");
}

Examples for RecognizeApi

Using GET Request with File URL

import 'dart:io';

import 'package:aspose_barcode_cloud/aspose_barcode_cloud.dart';

Configuration makeConfiguration() {
  final jwtToken = Platform.environment['TEST_CONFIGURATION_ACCESS_TOKEN'];
  if (jwtToken != null) {
    return Configuration(accessToken: jwtToken);
  } else {
    return Configuration(
      clientId: "Client Id from https://dashboard.aspose.cloud/applications",
      clientSecret:
          "Client Secret from https://dashboard.aspose.cloud/applications",
    );
  }
}

Future<void> main() async {
  final config = makeConfiguration();
  final recognizeApi = RecognizeApi(ApiClient(config));

  final result = await recognizeApi.recognize(
    DecodeBarcodeType.QR,
    "https://products.aspose.app/barcode/scan/img/how-to/scan/step2.png",
  );

  if (result.barcodes.isNotEmpty) {
    print("File recognized, result: '${result.barcodes[0].barcodeValue}'");
  } else {
    print("No barcodes were recognized.");
  }
}

Using POST Request with Base64 Encoded Image

import 'dart:convert';
import 'dart:io';

import 'package:aspose_barcode_cloud/aspose_barcode_cloud.dart';

Configuration makeConfiguration() {
  final jwtToken = Platform.environment['TEST_CONFIGURATION_ACCESS_TOKEN'];
  if (jwtToken != null) {
    return Configuration(accessToken: jwtToken);
  } else {
    return Configuration(
      clientId: "Client Id from https://dashboard.aspose.cloud/applications",
      clientSecret:
          "Client Secret from https://dashboard.aspose.cloud/applications",
    );
  }
}

Future<void> main() async {
  final config = makeConfiguration();
  final recognizeApi = RecognizeApi(ApiClient(config));

  final fileName =
      File("${Directory.current.path}${Platform.pathSeparator}qr.png")
          .absolute
          .path;
  final fileBytes = File(fileName).readAsBytesSync();
  final imageBase64 = base64Encode(fileBytes);

  final recognizeBase64Request = RecognizeBase64Request(
    [DecodeBarcodeType.QR],
    imageBase64,
  );

  final BarcodeResponseList result =
      await recognizeApi.recognizeBase64(recognizeBase64Request);

  print(
      "File '$fileName' recognized, result: '${result.barcodes[0].barcodeValue}'");
}

Using POST Request with File Stream

import 'dart:io';

import 'package:aspose_barcode_cloud/aspose_barcode_cloud.dart';

Configuration makeConfiguration() {
  final jwtToken = Platform.environment['TEST_CONFIGURATION_ACCESS_TOKEN'];
  if (jwtToken != null) {
    return Configuration(accessToken: jwtToken);
  } else {
    return Configuration(
      clientId: "Client Id from https://dashboard.aspose.cloud/applications",
      clientSecret:
          "Client Secret from https://dashboard.aspose.cloud/applications",
    );
  }
}

Future<void> main() async {
  final config = makeConfiguration();
  final recognizeApi = RecognizeApi(ApiClient(config));

  final file =
      await File('${Directory.current.path}${Platform.pathSeparator}qr.png')
          .readAsBytes();

  final BarcodeResponseList result =
      await recognizeApi.recognizeMultipart(DecodeBarcodeType.QR, file);

  if (result.barcodes.isNotEmpty) {
    final barcode = result.barcodes[0];
    print(
        "File recognized, results: value: '${barcode.barcodeValue}', type: ${barcode.type}");
  } else {
    print("File recognized, but no barcodes found.");
  }
}

Conclusion

Using the Aspose.BarCode.Cloud SDK for .NET, you can easily load and recognize barcode images in file URL, file, and base64 encoded formats.

Optimize your barcode recognition workflows by selecting the most appropriate method based on your specific image format and application requirements.

Set Target Barcode Types