Export to Excel on Angular 4

Question

I have a data table that is dynamically populated using Angular 4. I would like to export the table to excel. How can I achieve this in Angular 4. I\'m looking for .xls and not

Answer 1

before install libary

npm i file-saver
npm i xlsx

Create service excel with name class ExcelService ng g s excel/ExcelService you can coppy below code

import { Injectable } from '@angular/core';
import * as FileSaver from 'file-saver';
import * as XLSX from 'xlsx';
const EXCEL_TYPE = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=UTF-8';
const EXCEL_EXTENSION = '.xlsx';
@Injectable({
  providedIn: 'root'
})
export class ExcelServiceService {
  constructor() { }
  public exportAsExcelFile(json: any[], excelFileName: string): void {

    const worksheet: XLSX.WorkSheet = XLSX.utils.json_to_sheet(json);
    console.log('worksheet',worksheet);
    const workbook: XLSX.WorkBook = { Sheets: { 'data': worksheet }, SheetNames: ['data'] };
    const excelBuffer: any = XLSX.write(workbook, { bookType: 'xlsx', type: 'array' });
    this.saveAsExcelFile(excelBuffer, excelFileName);
  }
  private saveAsExcelFile(buffer: any, fileName: string): void {
    const data: Blob = new Blob([buffer], {
      type: EXCEL_TYPE
    });
    FileSaver.saveAs(data, fileName + '_export_' + new Date().getTime() + EXCEL_EXTENSION);
  }
}

Create folder model in have class CountryInfo

export class CountryInfo {
    country: string;
    hydro: number;
    oil: number;
    gas: number;
    coal: number;
    nuclear: number;
}

you can clone example export a file excel in angular at github

Answer 2

You can use XLSX for export to excel.

It will support json or array into excel.

Sample code

import * as XLSX from 'xlsx';

public exportAsExcelFile(json: any[], excelFileName: string): void {
  const worksheet: XLSX.WorkSheet = XLSX.utils.json_to_sheet(json);
  const workbook: XLSX.WorkBook = { Sheets: { 'data': worksheet }, SheetNames: ['data'] };
  const excelBuffer: any = XLSX.write(workbook, { bookType: 'xlsx', type: 'buffer' });
  this.saveAsExcelFile(excelBuffer, excelFileName);
}

For Save

private saveAsExcelFile(buffer: any, fileName: string): void {
  const data: Blob = new Blob([buffer], {
    type: EXCEL_TYPE
  });
  const today = new Date();
  const date = today.getFullYear() + '' + (today.getMonth() + 1) + '' + today.getDate() + '_';
  const time = today.getHours() + "-" + today.getMinutes() + "-" + today.getSeconds();
  const name = fileName + date + time;
  FileSaver.saveAs(data, name + EXCEL_EXTENSION);
}

Reference for Angular 2+

Xlsx for angular 2+

Answer 3

For those who are still looking for a working answer.

public export() {
    const worksheet: XLSX.WorkSheet = XLSX.utils.json_to_sheet(this.myDataModels);
    /* generate workbook and add the worksheet */
    const wb: XLSX.WorkBook = XLSX.utils.book_new();
    XLSX.utils.book_append_sheet(wb, worksheet, 'Sheet1');
    /* save to file */
    XLSX.writeFile(wb, this.createFileName());
}

This will save as an xlsx file automatically Got this from https://github.com/SheetJS/js-xlsx/tree/19620da30be2a7d7b9801938a0b9b1fd3c4c4b00/demos/angular2

Answer 4

It seems that microsoft provide a Javascript plugin, usable with Angular, here

Answer 5

You can only use xlsx library to write and save excel file at the same time using XLSX.writeFile()

exportExcel(data: any[]){
   const worksheet: XLSX.WorkSheet = XLSX.utils.json_to_sheet(data);
   const workbook: XLSX.WorkBook = { Sheets: { 'data': worksheet }, SheetNames: ['data'] };
   XLSX.writeFile(workbook, 'my_file.xls', { bookType: 'xls', type: 'buffer' });
}