【发布时间】：2017-02-10 11:00:37
【问题描述】：
我正在从 fileUpload 控件获取一个 csv 文件，并将 csv 文件也转换为 JSON 对象。现在我正在尝试用这个 JSON 数据填充 html 表。我写了一个 populatetable() 函数，但它没有正确显示数据。从这里可以看出，CSV 到 JSON 的转换正常进行 - JSON object
HTML 文件：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script src="http://code.jquery.com/jquery-1.11.1.min.js" type="text/javascript"> </script>
<!--<script type="text/javascript" src="JavaScript.js"></script>-->
<script type="text/javascript" src="CSV_to_JSON.js"></script>
<style>
table, th, td {
border: 1px solid black;
border-collapse: collapse;
}
th, td {
padding: 15px;
}
th {
text-align: left;
}
table {
border-spacing: 5px;
}
.guide {
text-decoration: underline;
text-align: center;
}
.odd {
color: #fff;
background: #666;
}
.even {
color: #666;
}
.hot {
border: 1px solid #f00;
}
</style>
</head>
<body>
<div class="container">
<div class="row">
<h2>---</h2>
</div>
<div class="panel panel-primary">
<div class="panel-heading">---</div>
<div class="panel-body">
<div class="row">
<div class="col-sm-12 col-sm-offset-1">
<form id="form1" runat="server" class="form-horizontal">
<div class="form-group">
<div class="col-sm-5">
<div class="col-sm-6">
<input type="file" accept=".csv" id="fileUpload" />
</div>
<div class="col-sm-6">
<input type="button" id="upload" class="btn btn-primary" value="Upload" />
</div>
</div>
<div class="col-sm-7">
<div class="col-sm-2">
<input type="button" id="cancel" class="btn btn-primary btn pull-right" value="Cancel/Save" style="visibility: hidden" />
</div>
<div class="col-sm-2">
<input type="button" id="process" class="btn btn-primary btn pull-right" value="Process" style="visibility: hidden" />
</div>
</div>
</div>
</form>
</div>
</div>
<div class="row">
<div class="col-sm-12">
<div class="panel panel-default" style="align-self: center">
<div class="panel-body" style="max-height: 400px; min-height: 400px; overflow-y: scroll;">
<div class="row">
<div class="col-sm-12">
<center>
<div class="input-append" id="filterDev" style="visibility:hidden">
<input name="search" id="inputFilter" placeholder="Enter ID to filter" />
<input type="button" value="Filter" id="filter" class="btn btn-primary" />
</div></center>
</div>
<br />
<br />
</div>
<div class="row">
<div class="col-sm-12" id="dvCSV"></div>
</div>
</div>
</div>
</div>
</div>
<div class="row">
<div class="col-sm-12">
<p id="download" style="color: cornflowerblue; visibility: hidden"><strong>Please click the below links to download the processed file..</strong></p>
</div>
</div>
<div class="row">
<div class="col-sm-12">
<div class="col-sm-3">
<p id="File1" style="color: cornflowerblue; text-decoration: underline; visibility: hidden">File1 Download</p>
</div>
<div class="col-sm-3">
<p id="File2" style="color: cornflowerblue; text-decoration: underline; visibility: hidden">File2 Download</p>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>
<script type="text/javascript">
$("#cancel").on("click", function () {
$('input:checked').each(function () {
$(this).closest("tr").remove();
});
});
/*$('#inputFilter').keyup(function () {
var that = this;
$.each($('tr'),
function (i, val) {
if ($(val).text().indexOf($(that).val()) == -1) {
$('#name').animate({
marginTop: 0
},
50,
function () {
$('tr').eq(i).hide();
});
} else {
$('#name').animate({
marginTop: 0
},
50,
function () {
$('tr').eq(i).show();
});
}
});
});*/
$(function () {
$("#process").bind("click", function () {
document.getElementById("File1").style.visibility = "visible";
document.getElementById("File2").style.visibility = "visible";
document.getElementById("download").style.visibility = "visible";
});
});
</script>
CSV_to_JSON.js -
$(function () {
$("#upload").bind("click", function () {
var regex = /^([a-zA-Z0-9\s_\\.\-:])+(.csv|.txt)$/;
if (regex.test($("#fileUpload").val().toLowerCase())) {
if (typeof (FileReader) != "undefined") {
var reader = new FileReader();
reader.onload = function (e) {
//var table = $("<table id='name'/>");
var lines = e.target.result.split("\n");
var result = [];
var headers = lines[0].split(",");
//alert(headers);
for (var i = 1; i < lines.length; i++) {
var obj = {};
var currentline = lines[i].split(",");
for (var j = 0; j < headers.length; j++) {
obj[headers[j]] = currentline[j];
}
result.push(obj);
}
alert(JSON.stringify(result));
populateTable(JSON.stringify(result));
}
reader.readAsText($("#fileUpload")[0].files[0]);
}
}
});
});
function populateTable(object) {
var obj = object;
var table = $("<table />");
table[0].border = "1";
var columnCount = obj[0].length;
var row = $(table[0].insertRow(-1));
for (var i = 0; i < columnCount; i++) {
var headerCell = $("<th />");
headerCell.html(obj[0][i]);
row.append(headerCell);
}
for (var i = 1; i < obj.length; i++) {
row = $(table[0].insertRow(-1));
for (var j = 0; j < columnCount; j++) {
var cell = $("<td />");
cell.html(obj[i][j]);
row.append(cell);
}
}
var dvTable = $("#dvCSV");
dvTable.html("");
dvTable.append(table);
}
这些数据如何在html表格中正确显示？
【问题讨论】：
-
在此行填充数据之前，您使用了自关闭的
table标签：var table = $("<table />");。这可能是您的数据无法正常显示的主要原因。 -
看看 Knockout.js（由 Microsoft 的 Steve Sanderson 开发）。它非常适合（比 jQuery 好得多）用于这样的目的。它使您能够对 HTML 元素使用数据绑定。
标签： javascript html json csv stringify