sheetjs/demos/angular2/src/app/sheetjs.component.ts

74 lines
1.9 KiB
TypeScript
Raw Normal View History

2017-06-21 23:10:36 +00:00
/* xlsx.js (C) 2013-present SheetJS -- http://sheetjs.com */
/* vim: set ts=2: */
import { Component } from '@angular/core';
import * as XLSX from 'xlsx';
import { saveAs } from 'file-saver';
type AOA = Array<Array<any>>;
2017-06-21 23:10:36 +00:00
function s2ab(s: string): ArrayBuffer {
2017-06-21 23:10:36 +00:00
const buf = new ArrayBuffer(s.length);
const view = new Uint8Array(buf);
for (let i = 0; i !== s.length; ++i) {
view[i] = s.charCodeAt(i) & 0xFF;
};
return buf;
}
@Component({
selector: 'sheetjs',
template: `
<input type="file" (change)="onFileChange($event)" multiple="false" />
<table class="sjs-table">
<tr *ngFor="let row of data">
<td *ngFor="let val of row">
{{val}}
</td>
</tr>
</table>
<button (click)="export()">Export!</button>
`
})
export class SheetJSComponent {
data: AOA = [[1,2],[3,4]];
wopts: XLSX.WritingOptions = { bookType:'xlsx', type:'binary' };
fileName: string = "SheetJS.xlsx";
2017-06-21 23:10:36 +00:00
onFileChange(evt: any) {
2017-06-21 23:10:36 +00:00
/* wire up file reader */
const target: DataTransfer = <DataTransfer>(evt.target);
if(target.files.length != 1) { throw new Error("Cannot upload multiple files on the entry") };
2017-06-21 23:10:36 +00:00
const reader = new FileReader();
reader.onload = (e: any) => {
2017-06-21 23:10:36 +00:00
/* read workbook */
const bstr = e.target.result;
const wb = XLSX.read(bstr, {type:'binary'});
/* grab first sheet */
const wsname = wb.SheetNames[0];
const ws = wb.Sheets[wsname];
/* save data */
this.data = <AOA>(XLSX.utils.sheet_to_json(ws, {header:1}));
2017-06-21 23:10:36 +00:00
};
reader.readAsBinaryString(target.files[0]);
}
export(): void {
2017-06-21 23:10:36 +00:00
/* generate worksheet */
const ws = XLSX.utils.aoa_to_sheet(this.data);
/* generate workbook and add the worksheet */
const wb = XLSX.utils.book_new();
XLSX.utils.book_append_sheet(wb, ws, 'Sheet1');
/* save to file */
const wbout = XLSX.write(wb, this.wopts);
console.log(this.fileName);
saveAs(new Blob([s2ab(wbout)]), this.fileName);
}
}