Canvas Datagrid和SheetJS导入导出xlsx示例

<!DOCTYPE html>
<!-- xlsx.js (C) 2013-present  SheetJS http://sheetjs.com -->
<!-- vim: set ts=2: -->
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>SheetJS + canvas-datagrid Live Demo</title>
<style>
#drop{
	border:2px dashed #bbb;
	-moz-border-radius:5px;
	-webkit-border-radius:5px;
	border-radius:5px;
	padding:25px;
	text-align:center;
	font:20pt bold,"Vollkorn";color:#bbb
}
#b64data{
	width:100%;
}
a { text-decoration: none }
</style>
</head>
<body>
<pre>
<b><a href="http://sheetjs.com">SheetJS Data Preview Live Demo</a></b>

<a href="https://github.com/TonyGermaneri/canvas-datagrid">canvas-datagrid component library</a>

<a href="https://github.com/SheetJS/js-xlsx">Source Code Repo</a>
<a href="https://github.com/SheetJS/js-xlsx/issues">Issues?  Something look weird?  Click here and report an issue</a>

<div id="drop">Drop a spreadsheet file here to see sheet data</div>
<input type="file" name="xlfile" id="xlf" /> ... or click here to select a file
<textarea id="b64data">... or paste a base64-encoding here</textarea>
<b>Advanced Demo Options:</b>
</pre>
<p><input type="submit" value="Export to XLSX!" id="xport" onclick="export_xlsx();" disabled="true"></p>
<div id="htmlout"></div>
<br />
<script src="https://unpkg.com/canvas-datagrid/dist/canvas-datagrid.js"></script>
<script src="shim.js"></script>
<script src="xlsx.full.min.js"></script>
<script>
/*jshint browser:true */
/* eslint-env browser */
/* eslint no-use-before-define:0 */
/*global Uint8Array, Uint16Array, ArrayBuffer */
/*global XLSX */

var cDg;

var process_wb = (function() {
	var XPORT = document.getElementById('xport');
	var HTMLOUT = document.getElementById('htmlout');

	return function process_wb(wb) {
		/* get data */
		var ws = wb.Sheets[wb.SheetNames[0]];
		var data = XLSX.utils.sheet_to_json(ws, {header:1});

		/* update canvas-datagrid */
		if(!cDg) cDg = canvasDatagrid({ parentNode:HTMLOUT, data:data });
		cDg.style.height = '100%';
		cDg.style.width = '100%';
		cDg.data = data;
		XPORT.disabled = false;

		/* create schema (for A,B,C column headings) */
		var range = XLSX.utils.decode_range(ws['!ref']);
		for(var i = range.s.c; i <= range.e.c; ++i) cDg.schema[i - range.s.c].title = XLSX.utils.encode_col(i);

		HTMLOUT.style.height = (window.innerHeight - 400) + "px";
		HTMLOUT.style.width = (window.innerWidth - 50) + "px";

		if(typeof console !== 'undefined') console.log("output", new Date());
	};
})();

var do_file = (function() {
	return function do_file(files) {
		var f = files[0];
		var reader = new FileReader();
		reader.onload = function(e) {
			if(typeof console !== 'undefined') console.log("onload", new Date());
			var data = e.target.result;
			data = new Uint8Array(data);
			process_wb(XLSX.read(data, {type: 'array'}));
		};
		reader.readAsArrayBuffer(f);
	};
})();

(function() {
	var drop = document.getElementById('drop');
	if(!drop.addEventListener) return;

	function handleDrop(e) {
		e.stopPropagation();
		e.preventDefault();
		do_file(e.dataTransfer.files);
	}

	function handleDragover(e) {
		e.stopPropagation();
		e.preventDefault();
		e.dataTransfer.dropEffect = 'copy';
	}

	drop.addEventListener('dragenter', handleDragover, false);
	drop.addEventListener('dragover', handleDragover, false);
	drop.addEventListener('drop', handleDrop, false);
})();

(function() {
	var xlf = document.getElementById('xlf');
	if(!xlf.addEventListener) return;
	function handleFile(e) { do_file(e.target.files); }
	xlf.addEventListener('change', handleFile, false);
})();

var export_xlsx = (function() {
	function prep(arr) {
		var out = [];
		for(var i = 0; i < arr.length; ++i) {
			if(!arr[i]) continue;
			if(Array.isArray(arr[i])) { out[i] = arr[i]; continue };
			var o = new Array();
			Object.keys(arr[i]).forEach(function(k) { o[+k] = arr[i][k] });
			out[i] = o;
		}
		return out;
	}

	return function export_xlsx() {
		if(!cDg) return;
		/* convert canvas-datagrid data to worksheet */
		var new_ws = XLSX.utils.aoa_to_sheet(prep(cDg.data));

		/* build workbook */
		var new_wb = XLSX.utils.book_new();
		XLSX.utils.book_append_sheet(new_wb, new_ws, 'SheetJS');

		/* write file and trigger a download */
		XLSX.writeFile(new_wb, 'sheetjs.xlsx', {bookSST:true});
	};
})();
</script>
<script type="text/javascript">
/* eslint no-use-before-define:0 */
	var _gaq = _gaq || [];
	_gaq.push(['_setAccount', 'UA-36810333-1']);
	_gaq.push(['_trackPageview']);

	(function() {
		var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
		ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
		var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
	})();
</script>
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Canvas Datagrid和SheetJS导入导出xlsx示例

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