Create Time-series chart

Let's create a time-series chart showing the Online sales of a SuperStore.

The chart will look as shown below:

The sample data for the above chart is shown in the table below:

Click here to view the full data.

Render the Chart

Now that you have the data handy, let's build the chart.

Create the DataHandler.ashx file and do the following:

• Include the FusionCharts.DataEngine.dll file.

• Include the FusionCharts.Visualization.dll file.

• Set response content type as "application/json".

• Create an object of CsvFileSource with file path.

• Create an object of the DataModel class.

• Add the object of CsvFileSource to the data source of data model.

• Convert the model to a data format the time series can accept.

• Write the converted data into a JSON file.

Refer to the code given below:

using FusionCharts.DataEngine;
using FusionCharts.Visualization;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace FcTest
{
    /// 

    /// Summary description for DataHandler
    /// 
    public class DataHandler : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {

            DataModel model = new DataModel();


            CsvFileSource source = new CsvFileSource("https://raw.githubusercontent.com/fusioncharts/dev_centre_docs/master/assets/datasources/fusioncharts-net/OnlineSalesSingleSeries.csv");


            model.DataSources.Add(source);


            context.Response.Write(TimeSeriesData.RenderCompatibleDataInJson(model,suppress,”chartId”));
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}
COPY

Imports FusionCharts.DataEngine
Imports FusionCharts.Visualization
Imports System
Imports System.Collections.Generic
Imports System.Linq
Imports System.Web

Namespace FcTest
    Public Class DataHandler
        Implements IHttpHandler

        Public Sub ProcessRequest(ByVal context As HttpContext)
            Dim model As DataModel = New DataModel()
            Dim source As CsvFileSource = New CsvFileSource("https://raw.githubusercontent.com/fusioncharts/dev_centre_docs/master/assets/datasources/fusioncharts-net/OnlineSalesSingleSeries.csv")
            model.DataSources.Add(source)
            context.Response.Write(TimeSeriesData.RenderCompatibleDataInJson(model,suppress,”chartId”))
        End Sub

        Public ReadOnly Property IsReusable As Boolean
            Get
                Return False
            End Get
        End Property
    End Class
End Namespace
COPY

Next, create the FirstTimeSeries.cs file and do the following:

• Include the FusionCharts.Visualization .dll file.

• Initialize the TimeSeriesChart object of the Charts class.

• Provide the data handler filename ("DataHandler.ashx") as the value of the SourcePathHandler property of the Data object of the timeSeries class.

• Provide the value of the Render() method to the Text property of Literal1.

using FusionCharts.Visualization;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Newtonsoft.Json.Converters;
using Newtonsoft.Json.Serialization;
using Newtonsoft.Json;

namespace TestProject
{
    public partial class FirstTimeSeries: System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            Charts.TimeSeriesChart timeSeries = new Charts.TimeSeriesChart("first_timeseries");
            timeSeries.Data.SourcePathHandler = "DataHandler.ashx";
            Literal1.Text = timeSeries.Render();
        }
    }
}
COPY

Imports FusionCharts.DataEngine
Imports FusionCharts.Visualization
Imports System
Imports System.Collections.Generic
Imports System.Data
Imports System.Linq
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls

Namespace FcTest
    Public Partial Class ChartTest
        Inherits System.Web.UI.Page

        Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
            Dim timeSeries As Charts.TimeSeriesChart = New Charts.TimeSeriesChart("first_timeseries")
            timeSeries.Data.SourcePathHandler = "DataHandler.ashx"
            timeSeries.Width.Pixel(700)
            timeSeries.Height.Pixel(500)
            timeSeries.SeriesName = "Country"
            timeSeries.YAxes.Plot.Add("Sales")
            Literal1.Text = timeSeries.Render()
        End Sub
    End Class
End Namespace
COPY

Next, open the FirstTimeSeries.aspx file and add the following line to it:

<asp:Literal ID="Literal1" runat="server"></asp:Literal>

Refer to the code given below:

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
  <head runat="server">
    <title></title>
    <script
      type="text/javascript"
      src="//cdn.fusioncharts.com/fusioncharts/latest/fusioncharts.js"
    ></script>
    <script
      type="text/javascript"
      src="//cdn.fusioncharts.com/fusioncharts/latest/fusioncharts.timeseries.js"
    ></script>

    <script
      type="text/javascript"
      src="//cdn.fusioncharts.com/fusioncharts/latest/themes/fusioncharts.theme.fusion.js"
    ></script>
  </head>

  <body>
    <script></script>

    <form id="form1" runat="server">
      <div>
        <asp:Literal ID="Literal1" runat="server"></asp:Literal>
      </div>
    </form>
  </body>
</html>COPY

Handling Time-Series data

The timeseries chart can deal with very large sets of data, but having too many values in your data can drastically slow down chart rendering on the browser. To counter this, the timeseries chart is designed to receive data as response through the generic handler.

In the generic handler, create an instance of the FusionCharts DataModel and apply any operation if you need. Then call the static method RenderCompatibleDataInJson of TimeSeriesData class and pass your DataModel instance as parameter. This method will return a JSON with the schema and the data. Write this JSON in your page response. After getting the JSON, the chart rendering engine will extract data and schema, and build a timeseries-compatible JSON for you.

Refer to the code given below:

/* create DataModel instance */
DataModel model = new DataModel();

CsvFileSource source = new CsvFileSource("https://raw.githubusercontent.com/fusioncharts/dev_centre_docs/master/assets/datasources/fusioncharts-net/OnlineSalesSingleSeries.csv");

model.DataSources.Add(source);

/* invoke RenderCompatibleDataInJson() static method of  TimeSeriesData class*/
/* it will return a JSON */
/* write the JSON as page response */
 context.Response.Write(TimeSeriesData.RenderCompatibleDataInJson(groupingWithAggregation));COPY

You can use Generic Handler page(.ashx) in web form application as well as MVC application.

In MVC application, if you want to fetch data through controller instead of creating a generic handler, do the following:

/* create the controller */
public ActionResult TimeSeriesDataHandler() {

/* create DataModel instance */ 
DataModel model = new DataModel();

CsvFileSource source = new CsvFileSource("https://raw.githubusercontent.com/fusioncharts/dev_centre_docs/master/assets/datasources/fusioncharts-net/OnlineSalesSingleSeries.csv");

model.DataSources.Add(source);

/* invoke RenderCompatibleDataInJson() static method of  TimeSeriesData class*/
/* it will return a json, return this json from your controller */
return Content(TimeSeriesData.RenderCompatibleDataInJson(model,suppress,”chartId”), "text/json");
}COPY

Now pass the path of this handler page or controller name(MVC) in the SourcePathHandler property (which accepts a string) of Data object.

timeSeries.Data.SourcePathHandler = "/path/to/local/DataSourceHandler.ashx";COPY