83 lines
2.5 KiB
TypeScript
83 lines
2.5 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 { encoding } from '@nativescript/core/text';
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import { File, Folder, knownFolders, path } from '@nativescript/core/file-system';
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import { Dialogs } from '@nativescript/core';
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import { Page, GridLayout, WebView, DockLayout, Button } from '@nativescript/core';
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import * as XLSX from './xlsx.full.min';
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@Component({
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selector: 'ns-app',
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template: `
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<Page>
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<GridLayout rows="auto, *, auto">
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<!-- data converted to HTML and rendered in web view -->
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<WebView row="1" src="{{html}}"></WebView>
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<DockLayout row="2" dock="bottom" stretchLastChild="false">
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<Button text="Import File" (tap)="import()" style="padding: 10px"></Button>
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<Button text="Export File" (tap)="export()" style="padding: 10px"></Button>
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</DockLayout>
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</GridLayout>
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</Page>
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`
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})
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export class AppComponent {
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html: string = "";
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constructor() {
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const ws = XLSX.utils.aoa_to_sheet([[1,2],[3,4]]);
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this.html = XLSX.utils.sheet_to_html(ws);
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};
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/* Import button */
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async import() {
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const filename: string = "SheetJSNS.csv";
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/* find appropriate path */
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const target: Folder = knownFolders.documents() || knownFolders.ios.sharedPublic();
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const url: string = path.normalize(target.path + "///" + filename);
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const file: File = File.fromPath(url);
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try {
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/* get binary string */
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const bstr: string = await file.readText(encoding.ISO_8859_1);
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/* read workbook */
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const wb = XLSX.read(bstr, { type: "binary" });
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/* grab first sheet */
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const wsname: string = wb.SheetNames[0];
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const ws = wb.Sheets[wsname];
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/* update table */
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this.html = XLSX.utils.sheet_to_html(ws);
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Dialogs.alert(`Attempting to read to ${filename} in ${url}`);
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} catch(e) {
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Dialogs.alert(e.message);
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}
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};
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/* Export button */
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async export() {
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const wb = XLSX.read(this.html, { type: "string" });
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const filename: string = "SheetJSNS.csv";
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/* generate binary string */
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const wbout: string = XLSX.write(wb, { bookType: 'csv', type: 'binary' });
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/* find appropriate path */
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const target: Folder = knownFolders.documents() || knownFolders.ios.sharedPublic();
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const url: string = path.normalize(target.path + "///" + filename);
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const file: File = File.fromPath(url);
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/* attempt to save binary string to file */
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await file.writeText(wbout, encoding.ISO_8859_1);
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Dialogs.alert(`Wrote to ${filename} in ${url}`);
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};
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}
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