我想知道如何将比较数据添加到同一个图表,我有当前的连接代码,以及下面的HTML,我想在同一个图表上比较Rainfall和Sunlight Data,它们都来自同一张表。我是否需要创建另一个get set?............................
public string chartData
{
get;
set;
}
public void renderChart()
{
DataTable dt = GetData();
data as datatable
List<int> _data = new List<int>();
foreach (DataRow row in dt.Rows)
{
_data.Add((int)row["Rainfall"]);
}
JavaScriptSerializer jss = new JavaScriptSerializer();
chartData = jss.Serialize(_data);
}
public DataTable GetData()
{
string connectionString = ConfigurationManager.ConnectionStrings["HighChartsConnectionString"].ConnectionString;
DataTable dt = new DataTable();
using (SqlConnection connection = new SqlConnection("SQLServerConnection"))
{
using (SqlCommand command = new SqlCommand("Select Rainfall,Sunlight from SalesData", connection))
{
connection.Open();
using (SqlDataReader dr = command.ExecuteReader())
{
if (dr.HasRows)
{
dt.Load(dr);
}
}
}
}
return dt;
}
$(function () {
$('#container').highcharts({
chart: {
type: 'column'
},
title: {
text: 'RainFall'
},
subtitle: {
text: ' '
},
xAxis: {
categories: [
'Amazon',
'Sudan',
'Europe'
]
},
yAxis: {
min: 0,
title: {
text: 'Rainfall in inches'
}
},
tooltip: {
headerFormat: '<span style="font-size:10px">{point.key}</span><table>',
pointFormat: '<tr><td style="color:{series.color};padding:0">{series.name}: </td>' +
'<td style="padding:0"><b>{point.y:.0f}</b></td></tr>',
footerFormat: '</table>',
shared: true,
useHTML: true
},
plotOptions: {
column: {
pointPadding: 0.2,
borderWidth: 0
}
},
series: [{
name: 'RainFall',
data: <%= chartData%>,
}]
});
});