Php Chart.js未显示在框中
我正在制作一个连接数据库的网站，并使用Chart.js用图形显示数据，但由于某些原因，它不起作用，我不知道为什么。我的整个php文件如下所示：Php Chart.js未显示在框中,php,jquery,chart.js,Php,Jquery,Chart.js,我正在制作一个连接数据库的网站，并使用Chart.js用图形显示数据，但由于某些原因，它不起作用，我不知道为什么。我的整个php文件如下所示： <!DOCTYPE html> <!-- This is a starter template page. Use this page to start your new project from scratch. This page gets rid of all links and provides the needed marku
<!DOCTYPE html>
<!--
This is a starter template page. Use this page to start your new project from
scratch. This page gets rid of all links and provides the needed markup only.
-->
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>AdminLTE 2 | Starter</title>
<!-- Tell the browser to be responsive to screen width -->
<meta content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" name="viewport">
<!-- Bootstrap 3.3.5 -->
<link rel="stylesheet" href="bootstrap/css/bootstrap.min.css">
<!-- Font Awesome -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.4.0/css/font-awesome.min.css">
<!-- Ionicons -->
<link rel="stylesheet" href="https://code.ionicframework.com/ionicons/2.0.1/css/ionicons.min.css">
<!-- Theme style -->
<link rel="stylesheet" href="dist/css/AdminLTE.min.css">
<!-- AdminLTE Skins. We have chosen the skin-blue for this starter
page. However, you can choose any other skin. Make sure you
apply the skin class to the body tag so the changes take effect.
-->
<link rel="stylesheet" href="dist/css/skins/skin-blue.min.css">
<!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
<script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
<![endif]-->
<!--
javascript code
-->
</head>
<!--
BODY TAG OPTIONS:
=================
Apply one or more of the following classes to get the
desired effect
|---------------------------------------------------------|
| SKINS | skin-blue |
| | skin-black |
| | skin-purple |
| | skin-yellow |
| | skin-red |
| | skin-green |
|---------------------------------------------------------|
|LAYOUT OPTIONS | fixed |
| | layout-boxed |
| | layout-top-nav |
| | sidebar-collapse |
| | sidebar-mini |
|---------------------------------------------------------|
-->
<body class="hold-transition skin-blue sidebar-mini">
<div class="wrapper">
<!-- Main Header -->
<header class="main-header">
<!-- Header Navbar -->
<nav class="navbar navbar-static-top" role="navigation">
<!-- Sidebar toggle button-->
<a href="#" class="sidebar-toggle" data-toggle="offcanvas" role="button">
<span class="sr-only">Toggle navigation</span>
</a>
<!-- Navbar Right Menu -->
</nav>
</header>
<!-- Left side column. contains the logo and sidebar -->
<aside class="main-sidebar">
<!-- sidebar: style can be found in sidebar.less -->
<section class="sidebar">
<!-- search form (Optional) -->
<form action="#" method="get" class="sidebar-form">
<div class="input-group">
<input type="text" name="q" class="form-control" placeholder="Search...">
<span class="input-group-btn">
<button type="submit" onclick="search_button()" name="search" id="search-btn" class="btn btn-flat"><i class="fa fa-search"></i>
</button>
</span>
</div>
</form>
<!-- /.search form -->
<!-- Sidebar Menu -->
<!-- /.sidebar-menu -->
</section>
<!-- /.sidebar -->
</aside>
<!-- Content Wrapper. Contains page content -->
<div class="content-wrapper">
<!-- Content Header (Page header) -->
<section class="content-header">
<h1>
Greenhouse information
<small>Select a greenhouse for more info</small>
</h1>
</section>
<!-- Main content -->
<section class="content" id="maincontent">
<!-- LINE CHART -->
<div class="box box-info" style="height:400px">
<div class="box-header with-border">
<h3 class="box-title">Line Chart</h3>
</div>
<div class="box-body" style="height:400px">
<div class="chart" style="height:400px">
<canvas id="lineChart" style="height:400px"></canvas>
</div>
</div>
<!-- /.box-body -->
</div>
<!-- /.box -->
<!-- Your Page Content Here -->
</section>
<!-- /.content -->
</div>
<!-- /.content-wrapper -->
<!-- Main Footer -->
<footer class="main-footer">
<!-- To the right -->
<div class="pull-right hidden-xs">
Anything you want
</div>
<!-- Default to the left -->
<strong>Copyright © 2015 <a href="#">Company</a>.</strong> All rights reserved.
</footer>
<!-- Control Sidebar -->
<aside class="control-sidebar control-sidebar-dark">
<!-- Create the tabs -->
<ul class="nav nav-tabs nav-justified control-sidebar-tabs">
<li class="active"><a href="#control-sidebar-home-tab" data-toggle="tab"><i class="fa fa-home"></i></a></li>
<li><a href="#control-sidebar-settings-tab" data-toggle="tab"><i class="fa fa-gears"></i></a></li>
</ul>
<!-- Tab panes -->
<div class="tab-content">
<!-- Home tab content -->
<div class="tab-pane active" id="control-sidebar-home-tab">
<h3 class="control-sidebar-heading">Recent Activity</h3>
<ul class="control-sidebar-menu">
<li>
<a href="javascript::;">
<i class="menu-icon fa fa-birthday-cake bg-red"></i>
<div class="menu-info">
<h4 class="control-sidebar-subheading">Langdon's Birthday</h4>
<p>Will be 23 on April 24th</p>
</div>
</a>
</li>
</ul>
<!-- /.control-sidebar-menu -->
<h3 class="control-sidebar-heading">Tasks Progress</h3>
<ul class="control-sidebar-menu">
<li>
<a href="javascript::;">
<h4 class="control-sidebar-subheading">
Custom Template Design
<span class="label label-danger pull-right">70%</span>
</h4>
<div class="progress progress-xxs">
<div class="progress-bar progress-bar-danger" style="width: 70%"></div>
</div>
</a>
</li>
</ul>
<!-- /.control-sidebar-menu -->
</div>
<!-- /.tab-pane -->
<!-- Stats tab content -->
<div class="tab-pane" id="control-sidebar-stats-tab">Stats Tab Content</div>
<!-- /.tab-pane -->
<!-- Settings tab content -->
<div class="tab-pane" id="control-sidebar-settings-tab">
<form method="post">
<h3 class="control-sidebar-heading">General Settings</h3>
<div class="form-group">
<label class="control-sidebar-subheading">
Report panel usage
<input type="checkbox" class="pull-right" checked>
</label>
<p>
Some information about this general settings option
</p>
</div>
<!-- /.form-group -->
</form>
</div>
<!-- /.tab-pane -->
</div>
</aside>
<!-- /.control-sidebar -->
<!-- Add the sidebar's background. This div must be placed
immediately after the control sidebar -->
<div class="control-sidebar-bg"></div>
</div>
<!-- ./wrapper -->
<!-- REQUIRED JS SCRIPTS -->
<!-- jQuery 2.1.4 -->
<script src="plugins/jQuery/jQuery-2.1.4.min.js"></script>
<!-- Bootstrap 3.3.5 -->
<script src="bootstrap/js/bootstrap.min.js"></script>
<!-- AdminLTE App -->
<script src="dist/js/app.min.js"></script>
<!-- ChartJS 1.0.1 -->
<!-- <script src="../../plugins/chartjs/Chart.min.js"></script> -->
<script src="../../Chart.js-master/Chart.min.js"></script>
<!-- FastClick -->
<script src="../../plugins/fastclick/fastclick.min.js"></script>
<!-- Optionally, you can add Slimscroll and FastClick plugins.
Both of these plugins are recommended to enhance the
user experience. Slimscroll is required when using the
fixed layout. -->
<!--
PHP code for database
-->
<script>
$(function () {
var areaChartData = {
labels: ["January", "February", "March", "April", "May", "June", "July"],
datasets: [
{
label: "Electronics",
fillColor: "rgba(210, 214, 222, 1)",
strokeColor: "rgba(210, 214, 222, 1)",
pointColor: "rgba(210, 214, 222, 1)",
pointStrokeColor: "#c1c7d1",
pointHighlightFill: "#fff",
pointHighlightStroke: "rgba(220,220,220,1)",
data: [65, 59, 80, 81, 56, 55, 40]
},
{
label: "Digital Goods",
fillColor: "rgba(60,141,188,0.9)",
strokeColor: "rgba(60,141,188,0.8)",
pointColor: "#3b8bba",
pointStrokeColor: "rgba(60,141,188,1)",
pointHighlightFill: "#fff",
pointHighlightStroke: "rgba(60,141,188,1)",
data: [28, 48, 40, 19, 86, 27, 90]
}
]
};
var areaChartOptions = {
//Boolean - If we should show the scale at all
showScale: true,
//Boolean - Whether grid lines are shown across the chart
scaleShowGridLines: false,
//String - Colour of the grid lines
scaleGridLineColor: "rgba(0,0,0,.05)",
//Number - Width of the grid lines
scaleGridLineWidth: 1,
//Boolean - Whether to show horizontal lines (except X axis)
scaleShowHorizontalLines: true,
//Boolean - Whether to show vertical lines (except Y axis)
scaleShowVerticalLines: true,
//Boolean - Whether the line is curved between points
bezierCurve: true,
//Number - Tension of the bezier curve between points
bezierCurveTension: 0.3,
//Boolean - Whether to show a dot for each point
pointDot: false,
//Number - Radius of each point dot in pixels
pointDotRadius: 4,
//Number - Pixel width of point dot stroke
pointDotStrokeWidth: 1,
//Number - amount extra to add to the radius to cater for hit detection outside the drawn point
pointHitDetectionRadius: 20,
//Boolean - Whether to show a stroke for datasets
datasetStroke: true,
//Number - Pixel width of dataset stroke
datasetStrokeWidth: 2,
//Boolean - Whether to fill the dataset with a color
datasetFill: false,
//String - A legend template
legendTemplate: "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<datasets.length; i++){%><li><span style=\"background-color:<%=datasets[i].lineColor%>\"></span><%if(datasets[i].label){%><%=datasets[i].label%><%}%></li><%}%></ul>",
//Boolean - whether to maintain the starting aspect ratio or not when responsive, if set to false, will take up entire container
maintainAspectRatio: true,
//Boolean - whether to make the chart responsive to window resizing
responsive: true
};
//-------------
//- LINE CHART -
//--------------
var lineChartOptions = areaChartOptions;
var lineChartCanvas = $("#lineChart").get(0).getContext("2d");
var lineChart = new Chart(lineChartCanvas).line(areaChartData,lineChartOptions);
});
</script>
<?php
$servername = "localhost";
$database = "simsdatabase";
$username = "test";
$password = "sims";
// Create connection
$conn = new mysqli($servername, $username, $password, $database);
// Check connection
if ($conn->connect_error)
{
die("Connection failed: " . $conn->connect_error);
}
echo "Connected successfully";
$getinfo = "SELECT Name FROM greenhouse";
$names = $conn->query($getinfo);
$result = $names->fetch_assoc();
echo $result["Name"];
?>
</body>
</html>
不管我做了什么，我都不知道如何用ID折线图在画布上显示图形，有人能看出我做错了什么吗？Potatopeelings建议我在
var lineChart = new Chart(lineChartCanvas).line(areaChartData,lineChartOptions);
<script src="../../Chart.js-master/Chart.min.js"></script>
感谢您对Potatopeelings的帮助：我认为您应该看到上述代码中存在错误。该方法是用大写字母LTANKS行的帮助！更改L给了我一条要处理的错误消息，我设法弄明白了：更改L后，我得到了错误：ReferenceError:图表未定义。从那里，我看了一下，并删除了.././部分，现在它像一个梦一样工作！