74 lines
1.9 KiB
TypeScript
74 lines
1.9 KiB
TypeScript
/* xlsx.js (C) 2013-present SheetJS -- http://sheetjs.com */
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/* vim: set ts=2: */
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import { Component } from '@angular/core';
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import * as XLSX from 'xlsx';
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import { saveAs } from 'file-saver';
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type AOA = Array<Array<any>>;
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function s2ab(s: string): ArrayBuffer {
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const buf = new ArrayBuffer(s.length);
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const view = new Uint8Array(buf);
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for (let i = 0; i !== s.length; ++i) {
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view[i] = s.charCodeAt(i) & 0xFF;
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};
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return buf;
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}
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@Component({
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selector: 'sheetjs',
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template: `
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<input type="file" (change)="onFileChange($event)" multiple="false" />
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<table class="sjs-table">
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<tr *ngFor="let row of data">
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<td *ngFor="let val of row">
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{{val}}
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</td>
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</tr>
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</table>
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<button (click)="export()">Export!</button>
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`
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})
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export class SheetJSComponent {
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data: AOA = [[1,2],[3,4]];
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wopts: XLSX.WritingOptions = { bookType:'xlsx', type:'binary' };
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fileName: string = "SheetJS.xlsx";
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onFileChange(evt: any) {
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/* wire up file reader */
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const target: DataTransfer = <DataTransfer>(evt.target);
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if(target.files.length != 1) { throw new Error("Cannot upload multiple files on the entry") };
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const reader = new FileReader();
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reader.onload = (e: any) => {
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/* read workbook */
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const bstr = e.target.result;
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const wb = XLSX.read(bstr, {type:'binary'});
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/* grab first sheet */
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const wsname = wb.SheetNames[0];
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const ws = wb.Sheets[wsname];
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/* save data */
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this.data = <AOA>(XLSX.utils.sheet_to_json(ws, {header:1}));
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};
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reader.readAsBinaryString(target.files[0]);
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}
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export(): void {
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/* generate worksheet */
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const ws = XLSX.utils.aoa_to_sheet(this.data);
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/* generate workbook and add the worksheet */
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const wb = XLSX.utils.book_new();
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XLSX.utils.book_append_sheet(wb, ws, 'Sheet1');
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/* save to file */
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const wbout = XLSX.write(wb, this.wopts);
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console.log(this.fileName);
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saveAs(new Blob([s2ab(wbout)]), this.fileName);
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}
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}
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