Change Theme

In FusionCharts.NET you can manually set the cosmetics and functional attributes for each chart and its components. This can work if you deal with only a small number of charts. As the number of charts increases, so does your hassles. FusionCharts.NET ships with predefined themes which you can use to set the visual appearance or the behavior of your chart.

FusionCharts.NET ships with the following predefined themes:

  • fusion
  • gammel
  • candy
  • zune
  • ocean
  • carbon

This article focuses on how to change the theme of a chart.

A chart configured to change the theme is shown below:

FusionCharts will load here..

To change the theme refer to the code 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 [Languages], [User] from dbo.UserPerLanguage";
            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);
            // 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 = "Most popular programming language";
            // set XAxis Text
            column.XAxis.Text = "Programming Language";
            // Set YAxis title
            column.YAxis.Text = "User";
            column.legend.Show = false;
            // add theme GAMMEL
            column.ThemeName = FusionChartsTheme.ThemeName.GAMMEL;
            column.Values.Show = true;
            Literal1.Text = column.Render();
        }
    }
}

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>

In the above code set the chart level theme as Gammel using the Themes properties of the PageLevelTheme object. By default, the theme is set as Fusion.

A chart with the Gammel theme applied is shown below:

FusionCharts will load here..

Click here to edit the above chart.

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