Javascript 谷歌图表在MVC中不起作用
我想用数据库中的数据创建一个谷歌图表 我有一个返回Json数据的操作,如下所示:Javascript 谷歌图表在MVC中不起作用,javascript,c#,jquery,asp.net-mvc,google-visualization,Javascript,C#,Jquery,Asp.net Mvc,Google Visualization,我想用数据库中的数据创建一个谷歌图表 我有一个返回Json数据的操作,如下所示: [{"Day":1,"Value":0.07,"Target":0.82},{"Day":2,"Value":1.00,"Target":0.82},{"Day":3,"Value":0.48,"Target":0.82},{"Day":4,"Value":0.63,"Target":0.82},{"Day":5,"Value":0.81,"Target":0.82},{"Day":6,"Value":0.18,"
[{"Day":1,"Value":0.07,"Target":0.82},{"Day":2,"Value":1.00,"Target":0.82},{"Day":3,"Value":0.48,"Target":0.82},{"Day":4,"Value":0.63,"Target":0.82},{"Day":5,"Value":0.81,"Target":0.82},{"Day":6,"Value":0.18,"Target":0.82},{"Day":7,"Value":0.67,"Target":0.82},{"Day":8,"Value":0.70,"Target":0.82},{"Day":9,"Value":0.29,"Target":0.82},{"Day":10,"Value":0.47,"Target":0.82},{"Day":11,"Value":0.03,"Target":0.82},{"Day":12,"Value":0.67,"Target":0.82},{"Day":13,"Value":0.54,"Target":0.82},{"Day":14,"Value":0.32,"Target":0.82},{"Day":15,"Value":0.66,"Target":0.82},{"Day":16,"Value":0.22,"Target":0.82},{"Day":17,"Value":0.86,"Target":0.82},{"Day":18,"Value":0.53,"Target":0.82},{"Day":19,"Value":0.12,"Target":0.82},{"Day":20,"Value":0.48,"Target":0.82},{"Day":21,"Value":0.56,"Target":0.82},{"Day":22,"Value":0.32,"Target":0.82},{"Day":23,"Value":0.70,"Target":0.82},{"Day":24,"Value":0.48,"Target":0.82},{"Day":25,"Value":0.64,"Target":0.82},{"Day":26,"Value":0.20,"Target":0.82},{"Day":27,"Value":0.02,"Target":0.82},{"Day":28,"Value":0.24,"Target":0.82},{"Day":29,"Value":0.65,"Target":0.82}]
我有一个观点:
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript">
var chartData;
google.load('visualization', '1.0', { 'packages': ['corechart'] });
google.charts.setOnLoadCallback(drawVisualization);
$.ajax({
url: '@Url.Action("GetDataGoogleChart", "Charts")',
dataType: "json",
type: "POST",
contentType: "application/json,chartset=utf-8",
cache: false,
success: function(data) {
chartData = data.d;
},
error: function() {
alert("Error loading data! Please try again.");
}
}).done(function() {
google.setOnLoadCallback(drawVisualization);
drawVisualization();
});
function drawVisualization() {
var data = google.visualization.arrayToDataTable(chartData);
var options = {
title: 'Some Title',
seriesType: 'bars',
series: { 2: { type: 'line' } }
};
var chart = new google.visualization.ComboChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
</script>
<div id="chart_div" style="width: 900px; height: 500px;"></div>
var图表数据;
load('visualization','1.0',{'packages':['corechart']});
google.charts.setOnLoadCallback(drawVisualization);
$.ajax({
url:'@url.Action(“GetDataGoogleChart”,“Charts”),
数据类型:“json”,
类型:“POST”,
contentType:“应用程序/json,图表集=utf-8”,
cache:false,
成功:功能(数据){
chartData=data.d;
},
错误:函数(){
警报(“加载数据时出错!请重试”);
}
}).done(函数(){
setOnLoadCallback(drawVisualization);
绘图可视化();
});
函数drawVisualization(){
var data=google.visualization.arrayToDataTable(chartData);
变量选项={
标题:“一些标题”,
序列类型:“条”,
系列:{2:{type:'line'}}
};
var chart=new google.visualization.ComboChart(document.getElementById('chart_div'));
图表绘制(数据、选项);
}
当我尝试打开此局部视图时,会收到以下错误消息:
未捕获引用错误:未定义google
你能帮我做这个图表吗
编辑
我的项目结构是:_Layout>MainPage>PartialView with chart
错误将我指向主页-第6行(当我单击它时,它会显示_布局-“
”的第6行,假设您的嵌入式脚本在外部Google API加载之前执行,请尝试通过将脚本包装在
$(document).ready(function() {
...
}
或者,如果您没有使用jQuery
document.addEventListener("DOMContentLoaded", function(event) {
...
});
这里发生了几件事 首先,问题中的代码混合了谷歌图表的版本 有两个脚本源可以使用 (一) Load语句如下所示
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawVisualization);
(二)
Load语句如下所示,请注意辅助名称空间charts
google.charts.load('current', {'packages': ['corechart']});
google.charts.setOnLoadCallback(drawVisualization);
后者,loader.js
,现在是首选方法
同时
如中所示,将setOnLoadCallback
与$(document.ready
结合使用也会导致问题
为了避免这种情况,可以在load语句中直接引用回调函数
$(document).ready(function(){
google.charts.load('current', {
'packages': ['corechart'],
'callback': drawVisualization
});
});
这里发生了两件事 有两个脚本源可以使用 (一) Load语句如下所示:
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawVisualization);
(二)
Load语句如下所示,请注意辅助名称空间图表
google.charts.load('current', {'packages': ['corechart']});
google.charts.setOnLoadCallback(drawVisualization);
(loader.js),现在是首选方法
正如本文所演示的,将setOnLoadCallback与$(document.ready)结合使用也会导致问题
回调函数可以在load语句中直接引用
$(document).ready(function(){
google.charts.load('current', {
'packages': ['corechart'],
'callback': drawVisualization
});
});
Amcharts的简单使用
https://www.amcharts.com/demos/
谷歌本身的文档:嗨,克里斯,我把所有脚本内容都放在$(document).ready(function(){…}仍然无法工作,我收到了相同的错误您是否100%确定正在加载Google API?检查Dev Tools>sources请用哪一行抛出错误更新您的问题。