84 lines
2.7 KiB
TypeScript
84 lines
2.7 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 dockModule from "tns-core-modules/ui/layouts/dock-layout";
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import * as buttonModule from "tns-core-modules/ui/button";
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import * as textModule from "tns-core-modules/text";
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import * as dialogs from "ui/dialogs";
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import * as fs from "tns-core-modules/file-system";
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/* NativeScript does not support import syntax for npm modules */
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const XLSX = require("./xlsx.full.min.js");
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@Component({
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selector: "my-app",
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template: `
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<GridLayout rows="auto, *, auto">
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<ActionBar row="0" title="SheetJS NativeScript Demo" class="action-bar"></ActionBar>
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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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`
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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.xlsx";
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/* find appropriate path */
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const target: fs.Folder = fs.knownFolders.documents() || fs.knownFolders.ios.sharedPublic();
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const url: string = fs.path.normalize(target.path + "///" + filename);
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const file: fs.File = fs.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(textModule.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 SheetJSNS.xlsx 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.xlsx";
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/* generate binary string */
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const wbout: string = XLSX.write(wb, { bookType: 'xlsx', type: 'binary' });
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/* find appropriate path */
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const target: fs.Folder = fs.knownFolders.documents() || fs.knownFolders.ios.sharedPublic();
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const url: string = fs.path.normalize(target.path + "///" + filename);
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const file: fs.File = fs.File.fromPath(url);
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/* attempt to save binary string to file */
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await file.writeText(wbout, textModule.encoding.ISO_8859_1);
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dialogs.alert(`Wrote to SheetJSNS.xlsx in ${url}`);
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};
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}
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