来自C＃的Highcharts时间序列数据以HighCharts所需的格式

Question

Highcharts requires that the series data be in this format

series : {
 data : [[x1,y1],[x2,y2],[x3,y3],[x4,y4],[x5,y5]]
}

My data is coming from ASP.net web application in the form of JSON ie

[{"time": x1, "value" : y1},{"time": x2, "value" : y2}]

In order for the data to work with Highcharts, I have to manually push the objects as an array in an empty array using JavaScript.

var tempData = [];
$.each(data, function(i, item) {
    tempData.push([item.time,item.value]);
});​
//then add the series using tempData

Ideally I would not like this to be done on the browser as it degrades the performance of the application on the client side and I am using large set of data.

On the C# side, this is what I have,

public class TimeValuePair
{
  double time {get;set;}
  double value{get;set;}
}
List<TimeValuePair> data= dataFromServer;

And I am returning the data as;

return Json(data, JsonRequestBehavior.AllowGet);

What is the proper way of dealing with this ?

Answer 1

You can use LINQ to achieve what you want in a compact way:

return new JavaScriptSerializer().Serialize(data.Select(t => new object[] {t.Time, t.Value}))

(Not sure what Json serializer you are using, so my example uses the one from System.Web.Extensions)

Answer 2

So you basically want to do this:

StringBuilder sb = new StringBuilder("series : {data : [");

foreach (var time_value_pair in data) sb.Append("[" + time_value_pair.time + "," + time_value_pair.value + "]");

sb.Append("]}");

and send sb.ToString() who whomever needs the string.