我正在尝试显示一个简单的图表,但未在本地主机上显示。我正在使用Codeigniter Framework + Google图表。
我想显示这个简单的图表:Chart
Data_model.php
:
defined('BASEPATH') OR exit('No direct script access allowed');
class Data_model extends CI_Model {
private $performance = 'sportoviska_zakaznici';
function __construct() {
}
function get_chart_data() {
return $this->db->query('SELECT pohlavie, count(*) as counts FROM sportoviska_zakaznici GROUP BY rok')->result_array();
}
}
Charts.php
(控制器):
class Charts extends CI_Controller {
function __Construct() {
parent::__Construct();
$this->load->helper(array('form', 'url'));
$this->load->model('data_model', 'chart');
}
public function index()
{
$data['chart_data'] = $this->chart->get_chart_data();
$this->load->view('uvodna_stranka', $data);
}
}
uvodna_stranka.php
(视图):
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8"/>
<title></title>
<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.3/jquery.min.js"></script>
<script type="text/javascript">
// Load the Visualization API and the line package.
// google.charts.load('current', {'packages':['bar', 'timeline']});
google.charts.load('current', {'packages':['corechart']});
// Set a callback to run when the Google Visualization API is loaded.
google.charts.setOnLoadCallback(drawChart);
function drawChart() {
var data = google.visualization.arrayToDataTable([
['pohlavie', 'counts'}],
<?php
foreach ($chart_data as $data) {
echo "['".$data["pohlavie"]."', ".$data["counts"]."],";
}
?>
var options = {
title: 'Company Performance'
};
var chart = new google.visualization.PieChart(document.getElementById('piechart'));
chart.draw(data, options);
}
</script>
</head>
<body>
<b>Bla bla<b>
<div id="piechart" style="width: 900px;"></div>
</body>
</html>
我正在尝试显示此MySQL表中的数据: Mysql table
当我尝试从本地主机图表访问它时,未显示。外观如下:Image
那是什么问题?
答案 0 :(得分:0)
您可以检查浏览器的控制台是否有错误(大多数情况下请按F12键)
这里有几个问题...
var data = google.visualization.arrayToDataTable([
['pohlavie', 'counts'}],
<?php
foreach ($chart_data as $data) {
echo "['".$data["pohlavie"]."', ".$data["counts"]."],";
}
?>
首先,在-> 'counts'}
之后有一个结束的花括号
删除...
接下来,数据数组没有大括号-> ]);
更改为...
var data = google.visualization.arrayToDataTable([
['pohlavie', 'counts'],
<?php
foreach ($chart_data as $data) {
echo "['".$data["pohlavie"]."', ".$data["counts"]."],";
}
?>
]);
答案 1 :(得分:0)
首先,您遇到语法问题,在 ['pohlavie','counts'} ] 中有一个右括号,甚至没有打开或有海豚我想。
然后,当您拥有数据时,就永远不会关闭该功能中的标记:
var data = google.visualization.arrayToDataTable([
['pohlavie', 'counts'}],
<?php
foreach ($chart_data as $data) {
echo "['".$data["pohlavie"]."', ".$data["counts"]."],";
}
我继续https://developers.google.com/chart/interactive/docs/drawing_charts,发现您可能应该使用以下第一个示例。就您而言,它应遵循以下内容,而不是您的 var数据:
data = new google.visualization.DataTable();
data.addColumn('string', 'pohlavie');
data.addColumn('number', 'counts');
data.addRows([
<?php
foreach ($chart_data as $data) {
echo '["'.$data["pohlavie"].'","'.$data["counts"].'"]';
}
?>
]);
请确保您应该查看google图表文档的示例。