ChartDirector 6.2 (.NET Edition)

Step Line Chart




This example demonstrates joining data points with steps. It also demonstrates irregularly spaced data points on an auto-scaled true date/time axis.

The step line layer is created using XYChart.addStepLineLayer.

Most of the sample charts in this document use enumerated x-axes. In this axis type, the data points are assumed to be evenly spread on the x-direction, so it is not necessary to supply the x values of the data points. The x-axis is treated as a series of text labels using Axis.setLabels or Axis.setLabels2. The labels can be dates/times, numbers, names, or any arbitrary text in any format. Enumerated x-axis is an easy to use yet extremely flexible axis type that is suitable for most charts.

However, for charts with data points not regularly spaced, it is necessary to supply the x values of the data points using Layer.setXData. In this case, ChartDirector can automatically determine the type and scale on the x-axis (auto-scaling).

For date/time axis, in many cases one may need to control the date/time label format. This can be done using Axis.setDateScale3.

Source Code Listing

[Windows Forms - C# version] NetWinCharts\CSharpWinCharts\stepline.cs
using System;
using ChartDirector;

namespace CSharpChartExplorer
{
    public class stepline : DemoModule
    {
        //Name of demo module
        public string getName() { return "Step Line Chart"; }

        //Number of charts produced in this demo module
        public int getNoOfCharts() { return 1; }

        //Main code for creating chart.
        //Note: the argument chartIndex is unused because this demo only has 1 chart.
        public void createChart(WinChartViewer viewer, int chartIndex)
        {
            // The data for the chart
            double[] dataY0 = {4, 4.5, 5, 5.25, 5.75, 5.25, 5, 4.5, 4, 3, 2.5, 2.5};
            DateTime[] dataX0 = {new DateTime(1997, 1, 1), new DateTime(1998, 6, 25), new DateTime(
                1999, 9, 6), new DateTime(2000, 2, 6), new DateTime(2000, 9, 21), new DateTime(2001,
                3, 4), new DateTime(2001, 6, 8), new DateTime(2002, 2, 4), new DateTime(2002, 5, 19
                ), new DateTime(2002, 8, 16), new DateTime(2002, 12, 1), new DateTime(2003, 1, 1)};

            double[] dataY1 = {7, 6.5, 6, 5, 6.5, 7, 6, 5.5, 5, 4, 3.5, 3.5};
            DateTime[] dataX1 = {new DateTime(1997, 1, 1), new DateTime(1997, 7, 1), new DateTime(
                1997, 12, 1), new DateTime(1999, 1, 15), new DateTime(1999, 6, 9), new DateTime(
                2000, 3, 3), new DateTime(2000, 8, 13), new DateTime(2001, 5, 5), new DateTime(2001,
                9, 16), new DateTime(2002, 3, 16), new DateTime(2002, 6, 1), new DateTime(2003, 1, 1
                )};

            // Create a XYChart object of size 500 x 270 pixels, with a pale blue (e0e0ff)
            // background, black border, 1 pixel 3D border effect and rounded corners
            XYChart c = new XYChart(600, 300, 0xe0e0ff, 0x000000, 1);
            c.setRoundedFrame();

            // Set the plotarea at (55, 60) and of size 520 x 200 pixels, with white (ffffff)
            // background. Set horizontal and vertical grid lines to grey (cccccc).
            c.setPlotArea(50, 60, 525, 200, 0xffffff, -1, -1, 0xcccccc, 0xcccccc);

            // Add a legend box at (55, 32) (top of the chart) with horizontal layout. Use 9pt Arial
            // Bold font. Set the background and border color to Transparent.
            c.addLegend(55, 32, false, "Arial Bold", 9).setBackground(Chart.Transparent);

            // Add a title box to the chart using 15pt Times Bold Italic font. The text is white
            // (ffffff) on a deep blue (000088) background, with soft lighting effect from the right
            // side.
            c.addTitle("Long Term Interest Rates", "Times New Roman Bold Italic", 15, 0xffffff
                ).setBackground(0x000088, -1, Chart.softLighting(Chart.Right));

            // Set the y axis label format to display a percentage sign
            c.yAxis().setLabelFormat("{value}%");

            // Add a red (ff0000) step line layer to the chart and set the line width to 2 pixels
            StepLineLayer layer0 = c.addStepLineLayer(dataY0, 0xff0000, "Country AAA");
            layer0.setXData(dataX0);
            layer0.setLineWidth(2);

            // Add a blue (0000ff) step line layer to the chart and set the line width to 2 pixels
            StepLineLayer layer1 = c.addStepLineLayer(dataY1, 0x0000ff, "Country BBB");
            layer1.setXData(dataX1);
            layer1.setLineWidth(2);

            // Output the chart
            viewer.Chart = c;

            //include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("clickable", "",
                "title='{dataSetName} change to {value}% on {x|mmm dd, yyyy}'");
        }
    }
}

[Windows Forms - VB Version] NetWinCharts\VBNetWinCharts\stepline.vb
Imports System
Imports Microsoft.VisualBasic
Imports ChartDirector

Public Class stepline
    Implements DemoModule

    'Name of demo module
    Public Function getName() As String Implements DemoModule.getName
        Return "Step Line Chart"
    End Function

    'Number of charts produced in this demo module
    Public Function getNoOfCharts() As Integer Implements DemoModule.getNoOfCharts
        Return 1
    End Function

    'Main code for creating chart.
    'Note: the argument chartIndex is unused because this demo only has 1 chart.
    Public Sub createChart(viewer As WinChartViewer, chartIndex As Integer) _
        Implements DemoModule.createChart

        ' The data for the chart
        Dim dataY0() As Double = {4, 4.5, 5, 5.25, 5.75, 5.25, 5, 4.5, 4, 3, 2.5, 2.5}
        Dim dataX0() As Date = {DateSerial(1997, 1, 1), DateSerial(1998, 6, 25), DateSerial(1999, _
            9, 6), DateSerial(2000, 2, 6), DateSerial(2000, 9, 21), DateSerial(2001, 3, 4), _
            DateSerial(2001, 6, 8), DateSerial(2002, 2, 4), DateSerial(2002, 5, 19), DateSerial( _
            2002, 8, 16), DateSerial(2002, 12, 1), DateSerial(2003, 1, 1)}

        Dim dataY1() As Double = {7, 6.5, 6, 5, 6.5, 7, 6, 5.5, 5, 4, 3.5, 3.5}
        Dim dataX1() As Date = {DateSerial(1997, 1, 1), DateSerial(1997, 7, 1), DateSerial(1997, _
            12, 1), DateSerial(1999, 1, 15), DateSerial(1999, 6, 9), DateSerial(2000, 3, 3), _
            DateSerial(2000, 8, 13), DateSerial(2001, 5, 5), DateSerial(2001, 9, 16), DateSerial( _
            2002, 3, 16), DateSerial(2002, 6, 1), DateSerial(2003, 1, 1)}

        ' Create a XYChart object of size 500 x 270 pixels, with a pale blue (e0e0ff) background,
        ' black border, 1 pixel 3D border effect and rounded corners
        Dim c As XYChart = New XYChart(600, 300, &He0e0ff, &H000000, 1)
        c.setRoundedFrame()

        ' Set the plotarea at (55, 60) and of size 520 x 200 pixels, with white (ffffff) background.
        ' Set horizontal and vertical grid lines to grey (cccccc).
        c.setPlotArea(50, 60, 525, 200, &Hffffff, -1, -1, &Hcccccc, &Hcccccc)

        ' Add a legend box at (55, 32) (top of the chart) with horizontal layout. Use 9pt Arial Bold
        ' font. Set the background and border color to Transparent.
        c.addLegend(55, 32, False, "Arial Bold", 9).setBackground(Chart.Transparent)

        ' Add a title box to the chart using 15pt Times Bold Italic font. The text is white (ffffff)
        ' on a deep blue (000088) background, with soft lighting effect from the right side.
        c.addTitle("Long Term Interest Rates", "Times New Roman Bold Italic", 15, &Hffffff _
            ).setBackground(&H000088, -1, Chart.softLighting(Chart.Right))

        ' Set the y axis label format to display a percentage sign
        c.yAxis().setLabelFormat("{value}%")

        ' Add a red (ff0000) step line layer to the chart and set the line width to 2 pixels
        Dim layer0 As StepLineLayer = c.addStepLineLayer(dataY0, &Hff0000, "Country AAA")
        layer0.setXData(dataX0)
        layer0.setLineWidth(2)

        ' Add a blue (0000ff) step line layer to the chart and set the line width to 2 pixels
        Dim layer1 As StepLineLayer = c.addStepLineLayer(dataY1, &H0000ff, "Country BBB")
        layer1.setXData(dataX1)
        layer1.setLineWidth(2)

        ' Output the chart
        viewer.Chart = c

        'include tool tip for the chart
        viewer.ImageMap = c.getHTMLImageMap("clickable", "", _
            "title='{dataSetName} change to {value}% on {x|mmm dd, yyyy}'")

    End Sub

End Class

[WPF - C#] NetWPFCharts\stepline.cs
using System;
using ChartDirector;

namespace CSharpWPFDemo
{
    public class stepline : DemoModule
    {
        //Name of demo module
        public string getName() { return "Step Line Chart"; }

        //Number of charts produced in this demo module
        public int getNoOfCharts() { return 1; }

        //Main code for creating chart.
        //Note: the argument chartIndex is unused because this demo only has 1 chart.
        public void createChart(WPFChartViewer viewer, int chartIndex)
        {
            // The data for the chart
            double[] dataY0 = {4, 4.5, 5, 5.25, 5.75, 5.25, 5, 4.5, 4, 3, 2.5, 2.5};
            DateTime[] dataX0 = {new DateTime(1997, 1, 1), new DateTime(1998, 6, 25), new DateTime(
                1999, 9, 6), new DateTime(2000, 2, 6), new DateTime(2000, 9, 21), new DateTime(2001,
                3, 4), new DateTime(2001, 6, 8), new DateTime(2002, 2, 4), new DateTime(2002, 5, 19
                ), new DateTime(2002, 8, 16), new DateTime(2002, 12, 1), new DateTime(2003, 1, 1)};

            double[] dataY1 = {7, 6.5, 6, 5, 6.5, 7, 6, 5.5, 5, 4, 3.5, 3.5};
            DateTime[] dataX1 = {new DateTime(1997, 1, 1), new DateTime(1997, 7, 1), new DateTime(
                1997, 12, 1), new DateTime(1999, 1, 15), new DateTime(1999, 6, 9), new DateTime(
                2000, 3, 3), new DateTime(2000, 8, 13), new DateTime(2001, 5, 5), new DateTime(2001,
                9, 16), new DateTime(2002, 3, 16), new DateTime(2002, 6, 1), new DateTime(2003, 1, 1
                )};

            // Create a XYChart object of size 500 x 270 pixels, with a pale blue (e0e0ff)
            // background, black border, 1 pixel 3D border effect and rounded corners
            XYChart c = new XYChart(600, 300, 0xe0e0ff, 0x000000, 1);
            c.setRoundedFrame();

            // Set the plotarea at (55, 60) and of size 520 x 200 pixels, with white (ffffff)
            // background. Set horizontal and vertical grid lines to grey (cccccc).
            c.setPlotArea(50, 60, 525, 200, 0xffffff, -1, -1, 0xcccccc, 0xcccccc);

            // Add a legend box at (55, 32) (top of the chart) with horizontal layout. Use 9pt Arial
            // Bold font. Set the background and border color to Transparent.
            c.addLegend(55, 32, false, "Arial Bold", 9).setBackground(Chart.Transparent);

            // Add a title box to the chart using 15pt Times Bold Italic font. The text is white
            // (ffffff) on a deep blue (000088) background, with soft lighting effect from the right
            // side.
            c.addTitle("Long Term Interest Rates", "Times New Roman Bold Italic", 15, 0xffffff
                ).setBackground(0x000088, -1, Chart.softLighting(Chart.Right));

            // Set the y axis label format to display a percentage sign
            c.yAxis().setLabelFormat("{value}%");

            // Add a red (ff0000) step line layer to the chart and set the line width to 2 pixels
            StepLineLayer layer0 = c.addStepLineLayer(dataY0, 0xff0000, "Country AAA");
            layer0.setXData(dataX0);
            layer0.setLineWidth(2);

            // Add a blue (0000ff) step line layer to the chart and set the line width to 2 pixels
            StepLineLayer layer1 = c.addStepLineLayer(dataY1, 0x0000ff, "Country BBB");
            layer1.setXData(dataX1);
            layer1.setLineWidth(2);

            // Output the chart
            viewer.Chart = c;

            //include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("clickable", "",
                "title='{dataSetName} change to {value}% on {x|mmm dd, yyyy}'");
        }
    }
}

[ASP.NET Web Forms - C# version] NetWebCharts\CSharpASP\stepline.aspx
(Click here on how to convert this code to code-behind style.)
<%@ Page Language="C#" Debug="true" %>
<%@ Import Namespace="ChartDirector" %>
<%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %>

<!DOCTYPE html>

<script runat="server">

//
// Page Load event handler
//
protected void Page_Load(object sender, EventArgs e)
{
    // The data for the chart
    double[] dataY0 = {4, 4.5, 5, 5.25, 5.75, 5.25, 5, 4.5, 4, 3, 2.5, 2.5};
    DateTime[] dataX0 = {new DateTime(1997, 1, 1), new DateTime(1998, 6, 25), new DateTime(1999, 9,
        6), new DateTime(2000, 2, 6), new DateTime(2000, 9, 21), new DateTime(2001, 3, 4),
        new DateTime(2001, 6, 8), new DateTime(2002, 2, 4), new DateTime(2002, 5, 19), new DateTime(
        2002, 8, 16), new DateTime(2002, 12, 1), new DateTime(2003, 1, 1)};

    double[] dataY1 = {7, 6.5, 6, 5, 6.5, 7, 6, 5.5, 5, 4, 3.5, 3.5};
    DateTime[] dataX1 = {new DateTime(1997, 1, 1), new DateTime(1997, 7, 1), new DateTime(1997, 12,
        1), new DateTime(1999, 1, 15), new DateTime(1999, 6, 9), new DateTime(2000, 3, 3),
        new DateTime(2000, 8, 13), new DateTime(2001, 5, 5), new DateTime(2001, 9, 16),
        new DateTime(2002, 3, 16), new DateTime(2002, 6, 1), new DateTime(2003, 1, 1)};

    // Create a XYChart object of size 500 x 270 pixels, with a pale blue (e0e0ff) background, black
    // border, 1 pixel 3D border effect and rounded corners
    XYChart c = new XYChart(600, 300, 0xe0e0ff, 0x000000, 1);
    c.setRoundedFrame();

    // Set the plotarea at (55, 60) and of size 520 x 200 pixels, with white (ffffff) background.
    // Set horizontal and vertical grid lines to grey (cccccc).
    c.setPlotArea(50, 60, 525, 200, 0xffffff, -1, -1, 0xcccccc, 0xcccccc);

    // Add a legend box at (55, 32) (top of the chart) with horizontal layout. Use 9pt Arial Bold
    // font. Set the background and border color to Transparent.
    c.addLegend(55, 32, false, "Arial Bold", 9).setBackground(Chart.Transparent);

    // Add a title box to the chart using 15pt Times Bold Italic font. The text is white (ffffff) on
    // a deep blue (000088) background, with soft lighting effect from the right side.
    c.addTitle("Long Term Interest Rates", "Times New Roman Bold Italic", 15, 0xffffff
        ).setBackground(0x000088, -1, Chart.softLighting(Chart.Right));

    // Set the y axis label format to display a percentage sign
    c.yAxis().setLabelFormat("{value}%");

    // Add a red (ff0000) step line layer to the chart and set the line width to 2 pixels
    StepLineLayer layer0 = c.addStepLineLayer(dataY0, 0xff0000, "Country AAA");
    layer0.setXData(dataX0);
    layer0.setLineWidth(2);

    // Add a blue (0000ff) step line layer to the chart and set the line width to 2 pixels
    StepLineLayer layer1 = c.addStepLineLayer(dataY1, 0x0000ff, "Country BBB");
    layer1.setXData(dataX1);
    layer1.setLineWidth(2);

    // Output the chart
    WebChartViewer1.Image = c.makeWebImage(Chart.PNG);

    // Include tool tip for the chart
    WebChartViewer1.ImageMap = c.getHTMLImageMap("", "",
        "title='{dataSetName} change to {value}% on {x|mmm dd, yyyy}'");
}

</script>

<html>
<body>
    <chart:WebChartViewer id="WebChartViewer1" runat="server" />
</body>
</html>

[ASP.NET Web Forms - VB Version] NetWebCharts\VBNetASP\stepline.aspx
(Click here on how to convert this code to code-behind style.)
<%@ Page Language="VB" Debug="true" %>
<%@ Import Namespace="ChartDirector" %>
<%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %>

<!DOCTYPE html>

<script runat="server">

'
' Page Load event handler
'
Protected Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)

    ' The data for the chart
    Dim dataY0() As Double = {4, 4.5, 5, 5.25, 5.75, 5.25, 5, 4.5, 4, 3, 2.5, 2.5}
    Dim dataX0() As Date = {DateSerial(1997, 1, 1), DateSerial(1998, 6, 25), DateSerial(1999, 9, 6 _
        ), DateSerial(2000, 2, 6), DateSerial(2000, 9, 21), DateSerial(2001, 3, 4), DateSerial( _
        2001, 6, 8), DateSerial(2002, 2, 4), DateSerial(2002, 5, 19), DateSerial(2002, 8, 16), _
        DateSerial(2002, 12, 1), DateSerial(2003, 1, 1)}

    Dim dataY1() As Double = {7, 6.5, 6, 5, 6.5, 7, 6, 5.5, 5, 4, 3.5, 3.5}
    Dim dataX1() As Date = {DateSerial(1997, 1, 1), DateSerial(1997, 7, 1), DateSerial(1997, 12, 1 _
        ), DateSerial(1999, 1, 15), DateSerial(1999, 6, 9), DateSerial(2000, 3, 3), DateSerial( _
        2000, 8, 13), DateSerial(2001, 5, 5), DateSerial(2001, 9, 16), DateSerial(2002, 3, 16), _
        DateSerial(2002, 6, 1), DateSerial(2003, 1, 1)}

    ' Create a XYChart object of size 500 x 270 pixels, with a pale blue (e0e0ff) background, black
    ' border, 1 pixel 3D border effect and rounded corners
    Dim c As XYChart = New XYChart(600, 300, &He0e0ff, &H000000, 1)
    c.setRoundedFrame()

    ' Set the plotarea at (55, 60) and of size 520 x 200 pixels, with white (ffffff) background. Set
    ' horizontal and vertical grid lines to grey (cccccc).
    c.setPlotArea(50, 60, 525, 200, &Hffffff, -1, -1, &Hcccccc, &Hcccccc)

    ' Add a legend box at (55, 32) (top of the chart) with horizontal layout. Use 9pt Arial Bold
    ' font. Set the background and border color to Transparent.
    c.addLegend(55, 32, False, "Arial Bold", 9).setBackground(Chart.Transparent)

    ' Add a title box to the chart using 15pt Times Bold Italic font. The text is white (ffffff) on
    ' a deep blue (000088) background, with soft lighting effect from the right side.
    c.addTitle("Long Term Interest Rates", "Times New Roman Bold Italic", 15, &Hffffff _
        ).setBackground(&H000088, -1, Chart.softLighting(Chart.Right))

    ' Set the y axis label format to display a percentage sign
    c.yAxis().setLabelFormat("{value}%")

    ' Add a red (ff0000) step line layer to the chart and set the line width to 2 pixels
    Dim layer0 As StepLineLayer = c.addStepLineLayer(dataY0, &Hff0000, "Country AAA")
    layer0.setXData(dataX0)
    layer0.setLineWidth(2)

    ' Add a blue (0000ff) step line layer to the chart and set the line width to 2 pixels
    Dim layer1 As StepLineLayer = c.addStepLineLayer(dataY1, &H0000ff, "Country BBB")
    layer1.setXData(dataX1)
    layer1.setLineWidth(2)

    ' Output the chart
    WebChartViewer1.Image = c.makeWebImage(Chart.PNG)

    ' Include tool tip for the chart
    WebChartViewer1.ImageMap = c.getHTMLImageMap("", "", _
        "title='{dataSetName} change to {value}% on {x|mmm dd, yyyy}'")

End Sub

</script>

<html>
<body>
    <chart:WebChartViewer id="WebChartViewer1" runat="server" />
</body>
</html>

[ASP.NET MVC - Controller] NetMvcCharts\Controllers\SteplineController.cs
using System;
using System.Web.Mvc;
using ChartDirector;

namespace NetMvcCharts.Controllers
{
    public class SteplineController : Controller
    {
        //
        // Default Action
        //
        public ActionResult Index()
        {
            ViewBag.Title = "Step Line Chart";
            createChart(ViewBag.Viewer = new RazorChartViewer(HttpContext, "chart1"));
            return View("~/Views/Shared/ChartView.cshtml");
        }

        //
        // Create chart
        //
        private void createChart(RazorChartViewer viewer)
        {
            // The data for the chart
            double[] dataY0 = {4, 4.5, 5, 5.25, 5.75, 5.25, 5, 4.5, 4, 3, 2.5, 2.5};
            DateTime[] dataX0 = {new DateTime(1997, 1, 1), new DateTime(1998, 6, 25), new DateTime(1999,
                9, 6), new DateTime(2000, 2, 6), new DateTime(2000, 9, 21), new DateTime(2001, 3, 4),
                new DateTime(2001, 6, 8), new DateTime(2002, 2, 4), new DateTime(2002, 5, 19),
                new DateTime(2002, 8, 16), new DateTime(2002, 12, 1), new DateTime(2003, 1, 1)};

            double[] dataY1 = {7, 6.5, 6, 5, 6.5, 7, 6, 5.5, 5, 4, 3.5, 3.5};
            DateTime[] dataX1 = {new DateTime(1997, 1, 1), new DateTime(1997, 7, 1), new DateTime(1997,
                12, 1), new DateTime(1999, 1, 15), new DateTime(1999, 6, 9), new DateTime(2000, 3, 3),
                new DateTime(2000, 8, 13), new DateTime(2001, 5, 5), new DateTime(2001, 9, 16),
                new DateTime(2002, 3, 16), new DateTime(2002, 6, 1), new DateTime(2003, 1, 1)};

            // Create a XYChart object of size 500 x 270 pixels, with a pale blue (e0e0ff) background,
            // black border, 1 pixel 3D border effect and rounded corners
            XYChart c = new XYChart(600, 300, 0xe0e0ff, 0x000000, 1);
            c.setRoundedFrame();

            // Set the plotarea at (55, 60) and of size 520 x 200 pixels, with white (ffffff) background.
            // Set horizontal and vertical grid lines to grey (cccccc).
            c.setPlotArea(50, 60, 525, 200, 0xffffff, -1, -1, 0xcccccc, 0xcccccc);

            // Add a legend box at (55, 32) (top of the chart) with horizontal layout. Use 9pt Arial Bold
            // font. Set the background and border color to Transparent.
            c.addLegend(55, 32, false, "Arial Bold", 9).setBackground(Chart.Transparent);

            // Add a title box to the chart using 15pt Times Bold Italic font. The text is white (ffffff)
            // on a deep blue (000088) background, with soft lighting effect from the right side.
            c.addTitle("Long Term Interest Rates", "Times New Roman Bold Italic", 15, 0xffffff
                ).setBackground(0x000088, -1, Chart.softLighting(Chart.Right));

            // Set the y axis label format to display a percentage sign
            c.yAxis().setLabelFormat("{value}%");

            // Add a red (ff0000) step line layer to the chart and set the line width to 2 pixels
            StepLineLayer layer0 = c.addStepLineLayer(dataY0, 0xff0000, "Country AAA");
            layer0.setXData(dataX0);
            layer0.setLineWidth(2);

            // Add a blue (0000ff) step line layer to the chart and set the line width to 2 pixels
            StepLineLayer layer1 = c.addStepLineLayer(dataY1, 0x0000ff, "Country BBB");
            layer1.setXData(dataX1);
            layer1.setLineWidth(2);

            // Output the chart
            viewer.Image = c.makeWebImage(Chart.PNG);

            // Include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("", "",
                "title='{dataSetName} change to {value}% on {x|mmm dd, yyyy}'");
        }
    }
}

[ASP.NET MVC - View] NetMvcCharts\Views\Shared\ChartView.cshtml
@{ Layout = null; }

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>@ViewBag.Title</title>
</head>
<body style="margin:5px 0px 0px 5px">
    <div style="font:bold 18pt verdana;">
        @ViewBag.Title
    </div>
    <hr style="border:solid 1px #000080" />
    <div>
        @{
            if (ViewBag.Viewer is Array)
            {
                // Display multiple charts
                for (int i = 0; i < ViewBag.Viewer.Length; ++i)
                {
                    @:@Html.Raw(ViewBag.Viewer[i].RenderHTML())
                }
            }
            else
            {
                // Display one chart only
                @:@Html.Raw(ViewBag.Viewer.RenderHTML())
            }
        }
    </div>
</body>
</html>