Import export annotation in React Pdfviewer component

15 Jan 20251 minute 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 onClick={ExportXfdf}>Export XFDF</button>
    <button onClick={ExportJSON}>Export JSON</button>
    <button onClick={ExportAsObject}>Export as Object</button>
    <button onClick={Import}>Import from Object</button>

<script>
    // export the annotation in XFDF format.
  function ExportXfdf(){   
        var viewer = document.getElementById('container').ej2_instances[0]; 
        viewer.exportAnnotation('Xfdf');
    }
    // export the annotation in JSON format.
    function ExportJSON(){
        var viewer = document.getElementById('container').ej2_instances[0];
        viewer.exportAnnotation('Json');
    }
    let exportAsObject;
    //Export annotation as object.
    function ExportAsObject(){
        var viewer = document.getElementById('container').ej2_instances[0];
        viewer.exportAnnotationsAsObject().then(function(value) {
            exportAsObject = value;
        });
    }
    //Import annotation that are exported as object.
    function Import (){
        var viewer = document.getElementById('container').ej2_instances[0];
        viewer.importAnnotation(JSON.parse(exportAsObject));
    }

View sample in GitHub.