Import export annotation in EJ2 TypeScript Pdfviewer control

15 Jan 20252 minutes to read

The PDF Viewer library allows you to import annotations from objects or streams instead of loading it as a file. To import such annotation objects, the PDF Viewer control must export the PDF annotations as objects using the ExportAnnotationsAsObject() method. Only the annotations objects that are exported from the PDF Viewer can be imported.

The following steps are used to import and export annotations in various formats such as objects, JSON, and XFDF.

Step 1: Follow the steps provided in the link to create a simple PDF Viewer sample.

Step 2: Use the following code snippet to perform import and export annotation.

    <button id="ExportXfdf">ExportXfdf</button>
    <button id="ExportJSON">ExportJSON</button>
    <button id="export">ExportasObject</button>
    <button id="import">Import</button>

enum AnnotationDataFormat {
    Json = 'Json',
    Xfdf = 'Xfdf'
  }

let ExportXfdf = document.getElementById('ExportXfdf');
if (ExportXfdf) {
    ExportXfdf.addEventListener('click', function () {
        // export the annotation in XFDF format.
        pdfviewer.exportAnnotation(AnnotationDataFormat.Xfdf);
    });
}

let ExportJSON = document.getElementById('ExportJSON');
if (ExportJSON) {
    ExportJSON.addEventListener('click', function () {
        // export the annotation in JSON format.
        pdfviewer.exportAnnotation(AnnotationDataFormat.Json);
    });
}

let exportObject: any;
let ExportAnnotationsAsObject = document.getElementById('export');
//Export annotation as object.
if (ExportAnnotationsAsObject) {
    ExportAnnotationsAsObject.addEventListener('click', () => {
        pdfviewer.exportAnnotationsAsObject().then(function (value: any) {
            exportObject = value;
        });
    });
}

let Import = document.getElementById('import');
//Import annotation that are exported as object.
if (Import) {
    Import.addEventListener('click', () => {
        pdfviewer.importAnnotation(JSON.parse(exportObject));
    });
}

View sample in GitHub