Set Barcode Colorscheme

This documentation provides a comprehensive guide on how to set the colorscheme for barcodes using the Aspose.BarCode Cloud SDK for Node.js. The API allows customization of barcode appearance, including foreground and background colors, ensuring your barcodes match your design needs.

Overview

The GenerateApi interface includes methods to generate barcodes using different request formats:

generate: GET request with parameters in route and query string.
generateBody: POST request with parameters in the body (JSON or XML).
generateMultipart: POST request with parameters in multipart form.

Colorscheme Parameters

The foregroundColor and backgroundColor properties enable you to define the colors for the barcode:

foregroundColor: Specifies the color of the bars and text.
backgroundColor: Specifies the background color of the barcode image.

Both properties accept standard color names or ARGB values (e.g., AliceBlue or #FF000000).

Examples

Example 1: Setting Colors Using GET Request

const fs = require('fs');
const path = require('path');
const Barcode = require('aspose-barcode-cloud-node');

function makeConfiguration() {
    const envToken = process.env['TEST_CONFIGURATION_ACCESS_TOKEN'];
    if (!envToken) {
        return new Barcode.Configuration(
            'Client Id from https://dashboard.aspose.cloud/applications',
            'Client Secret from https://dashboard.aspose.cloud/applications',
            null,
            null
        );
    } else {
        return new Barcode.Configuration(
            null,
            null,
            null,
            envToken
        );
    }
}
const config = makeConfiguration();

async function generateBarcode(api, fileName) {
    const request = new Barcode.GenerateRequestWrapper(
        Barcode.EncodeBarcodeType.Qr,
        'https://products.aspose.cloud/barcode/family/'
    );
    request.foregroundColor = "DarkBlue";
    request.backgroundColor = "LightGray";
    request.imageFormat = Barcode.BarcodeImageFormat.Png;

    const generated = await api.generate(request);

    fs.writeFileSync(fileName, generated.body);
}

const genApi = new Barcode.GenerateApi(config);
const fileName = path.resolve('testdata','Qr.png');

generateBarcode(genApi, fileName)
    .then(() => {
        console.log('File \'' + fileName + '\' generated.');
    })
    .catch(err => {
        console.error("Error: " + JSON.stringify(err, null, 2));
        process.exitCode = 1;
    });

Result Image is:

Example 2: Setting Colors Using POST Request with JSON Body

const fs = require('fs');
const path = require('path');
const Barcode = require('aspose-barcode-cloud-node');

function makeConfiguration() {
    const envToken = process.env['TEST_CONFIGURATION_ACCESS_TOKEN'];
    if (!envToken) {
        return new Barcode.Configuration(
            'Client Id from https://dashboard.aspose.cloud/applications',
            'Client Secret from https://dashboard.aspose.cloud/applications',
            null,
            null
        );
    } else {
        return new Barcode.Configuration(
            null,
            null,
            null,
            envToken
        );
    }
}
const config = makeConfiguration();

async function generateBarcode(api, fileName) {
    const imageParams = new Barcode.BarcodeImageParams();
    imageParams.foregroundColor = "#FF5733";
    imageParams.backgroundColor = "#FFFFFF";
    imageParams.imageFormat = Barcode.BarcodeImageFormat.Jpeg;

    const encodeData = new Barcode.EncodeData();
    encodeData.data = 'Aspose.BarCode.Cloud';
    encodeData.dataType = Barcode.EncodeDataType.StringData;

    const generateParams = new Barcode.GenerateParams();
    generateParams.barcodeType = Barcode.EncodeBarcodeType.Pdf417;
    generateParams.encodeData = encodeData;
    generateParams.barcodeImageParams = imageParams;

    const request = new Barcode.GenerateBodyRequestWrapper(generateParams);

    const generated = await api.generateBody(request);

    fs.writeFileSync(fileName, generated.body);
}

const genApi = new Barcode.GenerateApi(config);
const fileName = path.resolve('testdata','Pdf417.png');

generateBarcode(genApi, fileName)
    .then(() => {
        console.log('File \'' + fileName + '\' generated.');
    })
    .catch(err => {
        console.error("Error: " + JSON.stringify(err, null, 2));
        process.exitCode = 1;
    });

Result Image is:

Example 3: Setting Colors Using Multipart Form POST

const fs = require('fs');
const path = require('path');
const Barcode = require('aspose-barcode-cloud-node');

function makeConfiguration() {
    const envToken = process.env['TEST_CONFIGURATION_ACCESS_TOKEN'];
    if (!envToken) {
        return new Barcode.Configuration(
            'Client Id from https://dashboard.aspose.cloud/applications',
            'Client Secret from https://dashboard.aspose.cloud/applications',
            null,
            null
        );
    } else {
        return new Barcode.Configuration(
            null,
            null,
            null,
            envToken
        );
    }
}
const config = makeConfiguration();

function generateBarcode(api, fileName) {
    return new Promise(async (resolve, reject) => {
        try {
            const request = new Barcode.GenerateMultipartRequestWrapper(
                Barcode.EncodeBarcodeType.Code39,
                'Aspose'
            );
            request.foregroundColor = "Green";
            request.backgroundColor = "Yellow";
            request.imageFormat = Barcode.BarcodeImageFormat.Gif;

            const generated = await api.generateMultipart(request);

            fs.writeFileSync(fileName, generated.body);
            resolve();
        } catch (err) {
            reject(err);
        }
    });
}

const genApi = new Barcode.GenerateApi(config);
const fileName = path.resolve('testdata','Code39.png');

generateBarcode(genApi, fileName)
    .then(() => {
        console.log('Barcode saved to ' + fileName);
    })
    .catch(err => {
        console.error("Error: " + JSON.stringify(err, null, 2));
        process.exitCode = 1;
    });

Result Image is:

Conclusion

With GenerateApi in Aspose.BarCode Cloud SDK for Node.js, you can easily generate barcodes with customized colors. Whether you prefer GET, POST with JSON, or multipart form POST, the flexibility of this API ensures seamless integration and customization of barcodes in your applications.

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