Open document from URL in Angular DocumentEditor component

import { Component, OnInit, ViewChild } from '@angular/core';
import {
  DocumentEditorContainerComponent,
  ToolbarService,
} from '@syncfusion/ej2-angular-documenteditor';
@Component({
  selector: 'app-root',
  // specifies the template string for the DocumentEditorContainer component
  template: `<button id='export'(click)="onClick(this)">Export</button><ejs-documenteditorcontainer #documenteditor_default serviceUrl="https://ej2services.syncfusion.com/production/web-services/api/documenteditor/" height="600px" style="display:block" [enableToolbar]=true> </ejs-documenteditorcontainer>`,
  providers: [ToolbarService],
})
export class AppComponent implements OnInit {
  @ViewChild('documenteditor_default')
  public container: DocumentEditorContainerComponent;
  ngOnInit(): void {}
  onClick(): void {
    let http: XMLHttpRequest = new XMLHttpRequest();
    //add your url in which you want to open document inside the ""
    let content = { fileUrl: '' };
    let baseurl: string = '/api/documenteditor/ImportFileURL';
    http.open('POST', baseurl, true);
    http.setRequestHeader('Content-Type', 'application/json;charset=UTF-8');
    http.onreadystatechange = () => {
      if (http.readyState === 4) {
        if (http.status === 200 || http.status === 304) {
          //open the SFDT text in Document Editor
          this.container.documentEditor.open(http.responseText);
        }
      }
    };
    http.send(JSON.stringify(content));
  }
}

    [AcceptVerbs("Post")]
    public string ImportFileURL([FromBody]FileUrlInfo param)
    {
        try {
            using(WebClient client = new WebClient())
            {
                MemoryStream stream = new MemoryStream(client.DownloadData(param.fileUrl));
                WordDocument document = WordDocument.Load(stream, FormatType.Docx);
                string json = Newtonsoft.Json.JsonConvert.SerializeObject(document);
                document.Dispose();
                stream.Dispose();
                return json;
            }
        }
        catch (Exception) {
            return "";
        }
    }
    public class FileUrlInfo {
        public string fileUrl { get; set; }
        public string Content { get; set; }
    }