如何在MVC4中创建动态图表
本文关键字:动态 创建 MVC4 | 更新日期: 2023-09-27 18:04:54
我有一个asp.net mvc4应用程序,我必须添加一个图表来显示数据,但浏览器中没有显示任何内容。
下面是控制器的代码,运行良好:
DAL dal = new DAL();
public ActionResult Graph2(int Day)
{
List<Greenhouse> greenhouse = dal.FindTemperatureByDay(Day);
return View("DynamicGraph", greenhouse);
}
这是我的模型类Greenhouse:
public class Greenhouse
{
[Required]
public int Id { get; set; }
public DateTime DateTime { get; set; }
public double Temperature { get; set; }
public double Humidity { get; set; }
}
这是我试图把图表的视图。
@model List<Plotting.Models.Greenhouse>
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript">
google.load("visualization", "1", { packages: ["corechart"] });
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('number','Hour');
data.addColumn('number', 'Temperature');
for (i = 0; i < greenhouse.length; i++) {
data.addRow(greenhouse[i].DateTime.Hour,greenhouse[i].Temperature);
}
var options = {
'title': 'Daily Report for Humidity',
'width': 600,
'height': 500
};
var chart = new google.visualization.ColumnChart(document.getElementById('chartdiv'));
chart.draw(data, options);
}
</script>
您应该收到错误Uncaught Error: If argument is given to addRow, it must be an array, or null
。
你的行
data.addRow(greenhouse[i].DateTime.Hour,greenhouse[i].Temperature);
应改为
data.addRow([greenhouse[i].DateTime.Hour,greenhouse[i].Temperature]);
(the []).
假设您正在正确地将数据从服务器转换为javascript。
链接到jsfield