Filter Chart Data

Filter is an operation used to isolate data values from a large dataset, based on one or more conditions. If you apply one of these operations on the DataModel, it generates a new DataModel with the filtered data.

Types of filters

The predefined filters are:

  • Null
  • Not Null
  • Equal
  • Not Equal
  • Greater
  • Greater or Equal
  • Less
  • Less or Equal
  • Between
  • Begins with
  • Contains
  • Ends with

In this article, we will create a chart by applying couple of filter operations to tabular data. To begin with, let us create a simple chart showcasing Global online sales of a SuperStore. Let's create the chart using the tabular table shown below:

In the chart, Order Date Column will be represented using x-axis, whereas Sales column will be represented in the y-axis.

Order Date Country Sales
1/1/2011 Australia 120.366
1/1/2011 Australia 55.242
1/3/2011 Australia 276.102
1/3/2011 Australia 35.883
1/4/2011 United States 16.448
1/5/2011 United States 272.736
1/5/2011 United States 11.784
1/6/2011 United States 19.536
1/7/2011 United States 6.54
1/7/2011 United States 5.48
1/8/2011 United States 76.728
1/8/2011 United States 10.43
1/10/2011 Australia 1475.095
1/10/2011 United States 9.344
1/11/2011 India 141.57
1/11/2011 United States 51.94
1/11/2011 United States 2.89
1/12/2011 United States 9.94
1/13/2011 Australia 15.93
1/14/2011 United States 1325.85
1/14/2011 United States 572.58
1/15/2011 United States 61.96
1/16/2011 United States 149.95
1/17/2011 United States 18.588
1/17/2011 Australia 18.576
1/19/2011 United States 64.864
1/20/2011 United States 181.47
1/20/2011 Australia 138.753
1/21/2011 United States 1067.94
1/21/2011 United States 6.63
1/22/2011 Australia 59.724
1/24/2011 India 59.25
1/24/2011 United States 5.94
1/26/2011 India 79.38
1/26/2011 India 342.51
1/27/2011 United States 141.96
1/27/2011 United States 489.92
1/27/2011 United States 10.68
1/28/2011 Australia 531.522
1/29/2011 United States 3.928
1/31/2011 Australia 838.593

Using the above tabular data, you can build a chart that looks like the one shown below:

FusionCharts will load here..

Apply Filter Operations

Now, let's apply filter operation to the DataModel which consists of the data shown above. In the above tabular data, the Order Date column consists of date/time values and the Country column has names of three countries. To filter the data for United States from 1/11/2011 to 1/25/2011, run the following query:

DataModel andOperator = model.Where("Order Date is between 1/11/2011 to 1/25/2011 and Country = United States");

In the above code:

  • DataModel is a class.
  • andOperator is the object which holds the resultant data.
  • Between filter operation filters the Order Date column to the specified date/time.
  • The equals operation filters the Country column to show only the rows with the value of United States.

The output after running the above query looks the following:

FusionCharts will load here..

Click here to edit the above chart.

In the above chart, x-axis represents the Order Date column, whereas y-axis represents the Sales per day.

Steps to render the above chart is given below:

Create ColumnChart.aspx.cs

Create the ColumnChart.aspx.cs file and do the following:

  • Include the FusionCharts.DataEngine and FusionCharts.Visualization .dll files.
  • Create DataTable.
  • Retrieve data using database query.
  • Set server name.
  • Set DataBase name.
  • Connect with DataBase using a connection string.
  • Create StaticSource using the DataTable.
  • Create an instance of DataModel class.
  • Add DataSource to the DataModel.
  • Instantiate Column Chart.
  • Set Chart's width and height.
  • Set DataModel instance as the data source of the chart.
  • Set category field for the chart.
  • Set series field(s) for the chart.
  • Set Chart Title.
  • Finally, use a container using <div> to render the chart.

The code is shown below:

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 FusionCharts.DataEngine;
using FusionCharts.Visualization;

namespace FusionChartsVisualisationWebFormsSamples.Samples
{
    public partial class FirstChart: System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            // Create data table
            DataTable primaryData = new DataTable();

            // Retrieve data using database query
            string query = "select [Order Data], [Sales] from dbo.SalesOrder";
            string connetionstring = null;

            // Servevr name
            string serverName = "FusionChartsServer";

            // DataBase name
            string databaseName = "FusionChartsSamplesDB";
            primaryData.Clear();

            // Connection string
            connetionstring = "Data Source=" + serverName + ";Initial Catalog=" + databaseName + ";Trusted_Connection=true;";

            using (SqlConnection con = new SqlConnection(connetionstring))
            {
                con.Open();
                using (SqlCommand command = new SqlCommand(query, con))
                using (SqlDataAdapter da = new SqlDataAdapter(command))
                {
                    da.Fill(primaryData);
                }
            }
            // Create static source with this data table
            StaticSource source = new StaticSource(primaryData);
            // Create instance of DataModel class
            DataModel model = new DataModel();
            // Add DataSource to the DataModel
            model.DataSources.Add(source);
            // Filter Applied to the tabular data
            model = model.Where("Order Date is between 1/11/2011 to 1/25/2011 and Country = United States");
            // Instantiate Column Chart
            Charts.ColumnChart column = new Charts.ColumnChart("first_chart");
            // Set Chart's width and height
            column.Width = "700";
            column.Height = "400";
            // Set DataModel instance as the data source of the chart
            column.Data.Source = model;
            // Set Chart Title
            column.Caption.Text = "Online sales of SuperStore";
            // set chart subtitle
            column.SubCaption.Text = "Online sales of SuperStore";
            // set x axis
            column.XAxis.Text = "Order Date";
            // set y axis
            column.YAxis.Text = "Sales";
            // hide chart legend
            column.Legend.Show = false;
            // Render the chart to 'Literal1' literal control
            Literal1.Text = column.Render();
        }
    }
}

Create .aspx Template

The .aspx template for the above sample is shown below:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="FirstChart.aspx.cs" Inherits="FusionChartsVisualisationWebFormsSamples.Samples.FirstChart" %>

<!DOCTYPE html>

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

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

To get the detailed description about the filter operations listed above, click here.

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