使用 JSON 对象数据填充 html table
Populating html table with JSON object data
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。现在我试图用这个 JSON 数据填充 html table。我写了一个 populatetable() 函数，但它没有正确显示数据。 CSV 到 JSON 的转换正在正常进行，如下所示 -
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);
}
如何在 html table 中正确显示此数据？
问题源于您如何从 JSON object 获取密钥。 object 没有 length 属性 并且如果不在 object 之一上调用 Object.keys() 就不能像数组一样直接遍历它的键小号::
var columns = Object.keys(obj[0]);
// gives ["ID","Name","City","Address","Designation"]
从那里您可以获得列长度并参考列数组来设置您的 header 行：
var row = $(table[0].insertRow(-1));
for (var i = 0; i < columnCount; i++) {
var headerCell = $("<th />");
headerCell.html([columns[i]]);
row.append(headerCell);
}
您还需要修改设置后续 table 行的循环，以便在为每一行创建每个单元格时查找列名：
for (var i = 0; i < obj.length; i++) {
row = $(table[0].insertRow(-1));
for (var j = 0; j < columnCount; j++) {
var cell = $("<td />");
cell.html(obj[i][columns[j]]);
row.append(cell);
}
}
这是一个带有一些模拟数据的演示：
var mockData = [{
"ID": 1,
"Name": "Kevin",
"City": "Santa Clara",
"Address": "Longmen",
"Designation": "VP Marketing"
}, {
"ID": 2,
"Name": "Tina",
"City": "São Bartolomeu",
"Address": "Bojongloa",
"Designation": "Computer Systems Analyst III"
}, {
"ID": 3,
"Name": "Kevin",
"City": "Cilolohan",
"Address": "Tai’an",
"Designation": "Paralegal"
}, {
"ID": 4,
"Name": "Rebecca",
"City": "Runović",
"Address": "Tessaoua",
"Designation": "Human Resources Manager"
}, {
"ID": 5,
"Name": "Nancy",
"City": "Merritt",
"Address": "Yur’yevets",
"Designation": "Assistant Manager"
}, {
"ID": 6,
"Name": "Anne",
"City": "Pio Duran",
"Address": "Kuala Lumpur",
"Designation": "Sales Representative"
}, {
"ID": 7,
"Name": "Scott",
"City": "Xiamao",
"Address": "Banjarmasin",
"Designation": "Computer Systems Analyst II"
}, {
"ID": 8,
"Name": "Howard",
"City": "Rzeczenica",
"Address": "Nanyo",
"Designation": "Recruiting Manager"
}, {
"ID": 9,
"Name": "Frances",
"City": "Tubuhue",
"Address": "Rambatan",
"Designation": "Senior Quality Engineer"
}, {
"ID": 10,
"Name": "Bruce",
"City": "Gandi",
"Address": "Manuel Roxas",
"Designation": "Senior Financial Analyst"
}, {
"ID": 11,
"Name": "Victor",
"City": "Liuhou",
"Address": "Sambirejo",
"Designation": "Actuary"
}, {
"ID": 12,
"Name": "Phillip",
"City": "Fubei",
"Address": "Ulset",
"Designation": "Account Representative II"
}, {
"ID": 13,
"Name": "Cheryl",
"City": "Chasŏng",
"Address": "Otok",
"Designation": "Mechanical Systems Engineer"
}, {
"ID": 14,
"Name": "Arthur",
"City": "Shimodate",
"Address": "Morada Nova",
"Designation": "Payment Adjustment Coordinator"
}, {
"ID": 15,
"Name": "Jean",
"City": "Mojo",
"Address": "Pushkino",
"Designation": "Budget/Accounting Analyst II"
}, {
"ID": 16,
"Name": "Russell",
"City": "Qīrah",
"Address": "Vista Hermosa",
"Designation": "Research Assistant III"
}, {
"ID": 17,
"Name": "Larry",
"City": "Garoua Boulaï",
"Address": "Guanchi",
"Designation": "Office Assistant I"
}, {
"ID": 18,
"Name": "Kathleen",
"City": "Thongwa",
"Address": "Awilega",
"Designation": "Social Worker"
}, {
"ID": 19,
"Name": "Michael",
"City": "Hongqi",
"Address": "Karatau",
"Designation": "Electrical Engineer"
}, {
"ID": 20,
"Name": "Anna",
"City": "Xiacang",
"Address": "K Bang",
"Designation": "Product Engineer"
}];
function populateTable(object) {
var obj = object;
var table = $("<table />");
table[0].border = "1";
var columns = Object.keys(obj[0]);
var columnCount = columns.length;
var row = $(table[0].insertRow(-1));
for (var i = 0; i < columnCount; i++) {
var headerCell = $("<th />");
headerCell.html([columns[i]]);
row.append(headerCell);
}
for (var i = 0; i < obj.length; i++) {
row = $(table[0].insertRow(-1));
for (var j = 0; j < columnCount; j++) {
var cell = $("<td />");
cell.html(obj[i][columns[j]]);
row.append(cell);
}
}
var dvTable = $("#dvCSV");
dvTable.html("");
dvTable.append(table);
}
populateTable(mockData)
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="dvCSV">
</div>
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。现在我试图用这个 JSON 数据填充 html table。我写了一个 populatetable() 函数，但它没有正确显示数据。 CSV 到 JSON 的转换正在正常进行，如下所示 - 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);
}
如何在 html table 中正确显示此数据？
问题源于您如何从 JSON object 获取密钥。 object 没有 length 属性 并且如果不在 object 之一上调用 Object.keys() 就不能像数组一样直接遍历它的键小号::
var columns = Object.keys(obj[0]);
// gives ["ID","Name","City","Address","Designation"]
从那里您可以获得列长度并参考列数组来设置您的 header 行：
var row = $(table[0].insertRow(-1));
for (var i = 0; i < columnCount; i++) {
var headerCell = $("<th />");
headerCell.html([columns[i]]);
row.append(headerCell);
}
您还需要修改设置后续 table 行的循环，以便在为每一行创建每个单元格时查找列名：
for (var i = 0; i < obj.length; i++) {
row = $(table[0].insertRow(-1));
for (var j = 0; j < columnCount; j++) {
var cell = $("<td />");
cell.html(obj[i][columns[j]]);
row.append(cell);
}
}
这是一个带有一些模拟数据的演示：
var mockData = [{
"ID": 1,
"Name": "Kevin",
"City": "Santa Clara",
"Address": "Longmen",
"Designation": "VP Marketing"
}, {
"ID": 2,
"Name": "Tina",
"City": "São Bartolomeu",
"Address": "Bojongloa",
"Designation": "Computer Systems Analyst III"
}, {
"ID": 3,
"Name": "Kevin",
"City": "Cilolohan",
"Address": "Tai’an",
"Designation": "Paralegal"
}, {
"ID": 4,
"Name": "Rebecca",
"City": "Runović",
"Address": "Tessaoua",
"Designation": "Human Resources Manager"
}, {
"ID": 5,
"Name": "Nancy",
"City": "Merritt",
"Address": "Yur’yevets",
"Designation": "Assistant Manager"
}, {
"ID": 6,
"Name": "Anne",
"City": "Pio Duran",
"Address": "Kuala Lumpur",
"Designation": "Sales Representative"
}, {
"ID": 7,
"Name": "Scott",
"City": "Xiamao",
"Address": "Banjarmasin",
"Designation": "Computer Systems Analyst II"
}, {
"ID": 8,
"Name": "Howard",
"City": "Rzeczenica",
"Address": "Nanyo",
"Designation": "Recruiting Manager"
}, {
"ID": 9,
"Name": "Frances",
"City": "Tubuhue",
"Address": "Rambatan",
"Designation": "Senior Quality Engineer"
}, {
"ID": 10,
"Name": "Bruce",
"City": "Gandi",
"Address": "Manuel Roxas",
"Designation": "Senior Financial Analyst"
}, {
"ID": 11,
"Name": "Victor",
"City": "Liuhou",
"Address": "Sambirejo",
"Designation": "Actuary"
}, {
"ID": 12,
"Name": "Phillip",
"City": "Fubei",
"Address": "Ulset",
"Designation": "Account Representative II"
}, {
"ID": 13,
"Name": "Cheryl",
"City": "Chasŏng",
"Address": "Otok",
"Designation": "Mechanical Systems Engineer"
}, {
"ID": 14,
"Name": "Arthur",
"City": "Shimodate",
"Address": "Morada Nova",
"Designation": "Payment Adjustment Coordinator"
}, {
"ID": 15,
"Name": "Jean",
"City": "Mojo",
"Address": "Pushkino",
"Designation": "Budget/Accounting Analyst II"
}, {
"ID": 16,
"Name": "Russell",
"City": "Qīrah",
"Address": "Vista Hermosa",
"Designation": "Research Assistant III"
}, {
"ID": 17,
"Name": "Larry",
"City": "Garoua Boulaï",
"Address": "Guanchi",
"Designation": "Office Assistant I"
}, {
"ID": 18,
"Name": "Kathleen",
"City": "Thongwa",
"Address": "Awilega",
"Designation": "Social Worker"
}, {
"ID": 19,
"Name": "Michael",
"City": "Hongqi",
"Address": "Karatau",
"Designation": "Electrical Engineer"
}, {
"ID": 20,
"Name": "Anna",
"City": "Xiacang",
"Address": "K Bang",
"Designation": "Product Engineer"
}];
function populateTable(object) {
var obj = object;
var table = $("<table />");
table[0].border = "1";
var columns = Object.keys(obj[0]);
var columnCount = columns.length;
var row = $(table[0].insertRow(-1));
for (var i = 0; i < columnCount; i++) {
var headerCell = $("<th />");
headerCell.html([columns[i]]);
row.append(headerCell);
}
for (var i = 0; i < obj.length; i++) {
row = $(table[0].insertRow(-1));
for (var j = 0; j < columnCount; j++) {
var cell = $("<td />");
cell.html(obj[i][columns[j]]);
row.append(cell);
}
}
var dvTable = $("#dvCSV");
dvTable.html("");
dvTable.append(table);
}
populateTable(mockData)
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="dvCSV">
</div>