ChartDirector 6.2 (.NET Edition)

Inter-Line Coloring




This example demonstrates filling the area between two lines or curves.

In ChartDirector, an InterLineLayer can be used to fill the region between any two lines. The lines can be from a LineLayer, StepLineLayer, SplineLayer, TrendLayer, or from an axis Mark. Two colors can be used for filling, depending on which line is on top.

In this example, an InterLineLayer is used to fill the region between a normal line and a spline curve. Another InterLineLayer is used to fill the region between a normal line and a mark line. The fill color differs depending on which line is on top.

Source Code Listing

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

namespace CSharpChartExplorer
{
    public class linefill : DemoModule
    {
        //Name of demo module
        public string getName() { return "Inter-Line Coloring"; }

        //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 line chart
            double[] data0 = {70, 73, 80, 90, 95, 93, 82, 77, 82, 101, 111, 115};
            double[] data1 = {90, 96, 89, 77, 82, 96, 109, 109, 99, 108, 96, 91};
            double[] data2 = {58, 34, 25, 49, 64, 10, 16, 40, 25, 49, 40, 22};

            // The labels for the line chart
            string[] labels = {"2008-01", "2008-02", "2008-03", "2008-04", "2008-05", "2008-06",
                "2008-07", "2008-08", "2008-09", "2008-10", "2008-11", "2008-12"};

            // Create a XYChart object of size 450 x 450 pixels
            XYChart c = new XYChart(450, 450);

            // Add a title to the chart using 15pt Arial Italic font.
            ChartDirector.TextBox title = c.addTitle("Inter-line Coloring", "Arial Italic", 15);

            // Add a legend box where the top-center is anchored to the horizontal center of the
            // chart, just under the title. Use horizontal layout and 10 points Arial Bold font, and
            // transparent background and border. Use line style legend key.
            LegendBox legendBox = c.addLegend(c.getWidth() / 2, title.getHeight(), false,
                "Arial Bold Italic", 10);
            legendBox.setBackground(Chart.Transparent, Chart.Transparent);
            legendBox.setAlignment(Chart.TopCenter);
            legendBox.setLineStyleKey();

            // Tentatively set the plotarea at (70, 65) and of (chart_width - 100) x (chart_height -
            // 110) in size. Use light grey (c0c0c0) border and horizontal and vertical grid lines.
            PlotArea plotArea = c.setPlotArea(70, 65, c.getWidth() - 100, c.getHeight() - 110, -1,
                -1, 0xc0c0c0, 0xc0c0c0, -1);

            // Add a title to the y axis using 12pt Arial Bold Italic font
            c.yAxis().setTitle("Axis Title Placeholder", "Arial Bold Italic", 12);

            // Add a title to the x axis using 12pt Arial Bold Italic font
            c.xAxis().setTitle("Axis Title Placeholder", "Arial Bold Italic", 12);

            // Set the axes line width to 3 pixels
            c.xAxis().setWidth(3);
            c.yAxis().setWidth(3);

            // Set the labels on the x axis.
            c.xAxis().setLabels(labels);

            // Use 8 points Arial rotated by 90 degrees as the x-axis label font
            c.xAxis().setLabelStyle("Arial", 8, Chart.TextColor, 90);

            // Add a spline curve to the chart
            SplineLayer layer0 = c.addSplineLayer(data0, 0xff0000, "Data Set 0");
            layer0.setLineWidth(2);

            // Add a normal line to the chart
            LineLayer layer1 = c.addLineLayer(data1, 0x008800, "Data Set 1");
            layer1.setLineWidth(2);

            // Color the region between the above spline curve and normal line. Use the
            // semi-transparent red (80ff000000) if the spline curve is higher than the normal line,
            // otherwise use semi-transparent green (80008800)
            c.addInterLineLayer(layer0.getLine(), layer1.getLine(), unchecked((int)0x80ff0000),
                unchecked((int)0x80008800));

            // Add another normal line to the chart
            LineLayer layer2 = c.addLineLayer(data2, 0x0000ff, "Data Set 2");
            layer2.setLineWidth(2);

            // Add a horizontal mark line to the chart at y = 40
            Mark mark = c.yAxis().addMark(40, -1, "Threshold");
            mark.setLineWidth(2);

            // Set the mark line to purple (880088) dash line. Use white (ffffff) for the mark
            // label.
            mark.setMarkColor(c.dashLineColor(0x880088), 0xffffff);

            // Put the mark label at the left side of the mark, with a purple (880088) background.
            mark.setAlignment(Chart.Left);
            mark.setBackground(0x880088);

            // Color the region between the above normal line and mark line. Use the
            // semi-transparent blue (800000ff) if the normal line is higher than the mark line,
            // otherwise use semi-transparent purple (80880088)
            c.addInterLineLayer(layer2.getLine(), mark.getLine(), unchecked((int)0x800000ff),
                unchecked((int)0x80880088));

            // Layout the legend box, so we can get its height
            c.layoutLegend();

            // Adjust the plot area size, such that the bounding box (inclusive of axes) is 10
            // pixels from the left edge, just under the legend box, 25 pixels from the right edge,
            // and 10 pixels from the bottom edge.
            c.packPlotArea(10, legendBox.getTopY() + legendBox.getHeight(), c.getWidth() - 25,
                c.getHeight() - 10);

            // After determining the exact plot area position, we may adjust the legend box and the
            // title positions so that they are centered relative to the plot area (instead of the
            // chart)
            legendBox.setPos(plotArea.getLeftX() + (plotArea.getWidth() - legendBox.getWidth()) / 2,
                legendBox.getTopY());
            title.setPos(plotArea.getLeftX() + (plotArea.getWidth() - title.getWidth()) / 2,
                title.getTopY());

            // Output the chart
            viewer.Chart = c;

            //include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("clickable", "",
                "title='{dataSetName} in {xLabel}: {value}'");
        }
    }
}

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

Public Class linefill
    Implements DemoModule

    'Name of demo module
    Public Function getName() As String Implements DemoModule.getName
        Return "Inter-Line Coloring"
    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 line chart
        Dim data0() As Double = {70, 73, 80, 90, 95, 93, 82, 77, 82, 101, 111, 115}
        Dim data1() As Double = {90, 96, 89, 77, 82, 96, 109, 109, 99, 108, 96, 91}
        Dim data2() As Double = {58, 34, 25, 49, 64, 10, 16, 40, 25, 49, 40, 22}

        ' The labels for the line chart
        Dim labels() As String = {"2008-01", "2008-02", "2008-03", "2008-04", "2008-05", _
            "2008-06", "2008-07", "2008-08", "2008-09", "2008-10", "2008-11", "2008-12"}

        ' Create a XYChart object of size 450 x 450 pixels
        Dim c As XYChart = New XYChart(450, 450)

        ' Add a title to the chart using 15pt Arial Italic font.
        Dim title As ChartDirector.TextBox = c.addTitle("Inter-line Coloring", "Arial Italic", 15)

        ' Add a legend box where the top-center is anchored to the horizontal center of the chart,
        ' just under the title. Use horizontal layout and 10 points Arial Bold font, and transparent
        ' background and border. Use line style legend key.
        Dim legendBox As LegendBox = c.addLegend(c.getWidth() / 2, title.getHeight(), False, _
            "Arial Bold Italic", 10)
        legendBox.setBackground(Chart.Transparent, Chart.Transparent)
        legendBox.setAlignment(Chart.TopCenter)
        legendBox.setLineStyleKey()

        ' Tentatively set the plotarea at (70, 65) and of (chart_width - 100) x (chart_height - 110)
        ' in size. Use light grey (c0c0c0) border and horizontal and vertical grid lines.
        Dim plotArea As PlotArea = c.setPlotArea(70, 65, c.getWidth() - 100, c.getHeight() - 110, _
            -1, -1, &Hc0c0c0, &Hc0c0c0, -1)

        ' Add a title to the y axis using 12pt Arial Bold Italic font
        c.yAxis().setTitle("Axis Title Placeholder", "Arial Bold Italic", 12)

        ' Add a title to the x axis using 12pt Arial Bold Italic font
        c.xAxis().setTitle("Axis Title Placeholder", "Arial Bold Italic", 12)

        ' Set the axes line width to 3 pixels
        c.xAxis().setWidth(3)
        c.yAxis().setWidth(3)

        ' Set the labels on the x axis.
        c.xAxis().setLabels(labels)

        ' Use 8 points Arial rotated by 90 degrees as the x-axis label font
        c.xAxis().setLabelStyle("Arial", 8, Chart.TextColor, 90)

        ' Add a spline curve to the chart
        Dim layer0 As SplineLayer = c.addSplineLayer(data0, &Hff0000, "Data Set 0")
        layer0.setLineWidth(2)

        ' Add a normal line to the chart
        Dim layer1 As LineLayer = c.addLineLayer(data1, &H008800, "Data Set 1")
        layer1.setLineWidth(2)

        ' Color the region between the above spline curve and normal line. Use the semi-transparent
        ' red (80ff000000) if the spline curve is higher than the normal line, otherwise use
        ' semi-transparent green (80008800)
        c.addInterLineLayer(layer0.getLine(), layer1.getLine(), &H80ff0000, &H80008800)

        ' Add another normal line to the chart
        Dim layer2 As LineLayer = c.addLineLayer(data2, &H0000ff, "Data Set 2")
        layer2.setLineWidth(2)

        ' Add a horizontal mark line to the chart at y = 40
        Dim mark As Mark = c.yAxis().addMark(40, -1, "Threshold")
        mark.setLineWidth(2)

        ' Set the mark line to purple (880088) dash line. Use white (ffffff) for the mark label.
        mark.setMarkColor(c.dashLineColor(&H880088), &Hffffff)

        ' Put the mark label at the left side of the mark, with a purple (880088) background.
        mark.setAlignment(Chart.Left)
        mark.setBackground(&H880088)

        ' Color the region between the above normal line and mark line. Use the semi-transparent
        ' blue (800000ff) if the normal line is higher than the mark line, otherwise use
        ' semi-transparent purple (80880088)
        c.addInterLineLayer(layer2.getLine(), mark.getLine(), &H800000ff, &H80880088)

        ' Layout the legend box, so we can get its height
        c.layoutLegend()

        ' Adjust the plot area size, such that the bounding box (inclusive of axes) is 10 pixels
        ' from the left edge, just under the legend box, 25 pixels from the right edge, and 10
        ' pixels from the bottom edge.
        c.packPlotArea(10, legendBox.getTopY() + legendBox.getHeight(), c.getWidth() - 25, _
            c.getHeight() - 10)

        ' After determining the exact plot area position, we may adjust the legend box and the title
        ' positions so that they are centered relative to the plot area (instead of the chart)
        legendBox.setPos(plotArea.getLeftX() + (plotArea.getWidth() - legendBox.getWidth()) / 2, _
            legendBox.getTopY())
        title.setPos(plotArea.getLeftX() + (plotArea.getWidth() - title.getWidth()) / 2, _
            title.getTopY())

        ' Output the chart
        viewer.Chart = c

        'include tool tip for the chart
        viewer.ImageMap = c.getHTMLImageMap("clickable", "", _
            "title='{dataSetName} in {xLabel}: {value}'")

    End Sub

End Class

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

namespace CSharpWPFDemo
{
    public class linefill : DemoModule
    {
        //Name of demo module
        public string getName() { return "Inter-Line Coloring"; }

        //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 line chart
            double[] data0 = {70, 73, 80, 90, 95, 93, 82, 77, 82, 101, 111, 115};
            double[] data1 = {90, 96, 89, 77, 82, 96, 109, 109, 99, 108, 96, 91};
            double[] data2 = {58, 34, 25, 49, 64, 10, 16, 40, 25, 49, 40, 22};

            // The labels for the line chart
            string[] labels = {"2008-01", "2008-02", "2008-03", "2008-04", "2008-05", "2008-06",
                "2008-07", "2008-08", "2008-09", "2008-10", "2008-11", "2008-12"};

            // Create a XYChart object of size 450 x 450 pixels
            XYChart c = new XYChart(450, 450);

            // Add a title to the chart using 15pt Arial Italic font.
            ChartDirector.TextBox title = c.addTitle("Inter-line Coloring", "Arial Italic", 15);

            // Add a legend box where the top-center is anchored to the horizontal center of the
            // chart, just under the title. Use horizontal layout and 10 points Arial Bold font, and
            // transparent background and border. Use line style legend key.
            LegendBox legendBox = c.addLegend(c.getWidth() / 2, title.getHeight(), false,
                "Arial Bold Italic", 10);
            legendBox.setBackground(Chart.Transparent, Chart.Transparent);
            legendBox.setAlignment(Chart.TopCenter);
            legendBox.setLineStyleKey();

            // Tentatively set the plotarea at (70, 65) and of (chart_width - 100) x (chart_height -
            // 110) in size. Use light grey (c0c0c0) border and horizontal and vertical grid lines.
            PlotArea plotArea = c.setPlotArea(70, 65, c.getWidth() - 100, c.getHeight() - 110, -1,
                -1, 0xc0c0c0, 0xc0c0c0, -1);

            // Add a title to the y axis using 12pt Arial Bold Italic font
            c.yAxis().setTitle("Axis Title Placeholder", "Arial Bold Italic", 12);

            // Add a title to the x axis using 12pt Arial Bold Italic font
            c.xAxis().setTitle("Axis Title Placeholder", "Arial Bold Italic", 12);

            // Set the axes line width to 3 pixels
            c.xAxis().setWidth(3);
            c.yAxis().setWidth(3);

            // Set the labels on the x axis.
            c.xAxis().setLabels(labels);

            // Use 8 points Arial rotated by 90 degrees as the x-axis label font
            c.xAxis().setLabelStyle("Arial", 8, Chart.TextColor, 90);

            // Add a spline curve to the chart
            SplineLayer layer0 = c.addSplineLayer(data0, 0xff0000, "Data Set 0");
            layer0.setLineWidth(2);

            // Add a normal line to the chart
            LineLayer layer1 = c.addLineLayer(data1, 0x008800, "Data Set 1");
            layer1.setLineWidth(2);

            // Color the region between the above spline curve and normal line. Use the
            // semi-transparent red (80ff000000) if the spline curve is higher than the normal line,
            // otherwise use semi-transparent green (80008800)
            c.addInterLineLayer(layer0.getLine(), layer1.getLine(), unchecked((int)0x80ff0000),
                unchecked((int)0x80008800));

            // Add another normal line to the chart
            LineLayer layer2 = c.addLineLayer(data2, 0x0000ff, "Data Set 2");
            layer2.setLineWidth(2);

            // Add a horizontal mark line to the chart at y = 40
            Mark mark = c.yAxis().addMark(40, -1, "Threshold");
            mark.setLineWidth(2);

            // Set the mark line to purple (880088) dash line. Use white (ffffff) for the mark
            // label.
            mark.setMarkColor(c.dashLineColor(0x880088), 0xffffff);

            // Put the mark label at the left side of the mark, with a purple (880088) background.
            mark.setAlignment(Chart.Left);
            mark.setBackground(0x880088);

            // Color the region between the above normal line and mark line. Use the
            // semi-transparent blue (800000ff) if the normal line is higher than the mark line,
            // otherwise use semi-transparent purple (80880088)
            c.addInterLineLayer(layer2.getLine(), mark.getLine(), unchecked((int)0x800000ff),
                unchecked((int)0x80880088));

            // Layout the legend box, so we can get its height
            c.layoutLegend();

            // Adjust the plot area size, such that the bounding box (inclusive of axes) is 10
            // pixels from the left edge, just under the legend box, 25 pixels from the right edge,
            // and 10 pixels from the bottom edge.
            c.packPlotArea(10, legendBox.getTopY() + legendBox.getHeight(), c.getWidth() - 25,
                c.getHeight() - 10);

            // After determining the exact plot area position, we may adjust the legend box and the
            // title positions so that they are centered relative to the plot area (instead of the
            // chart)
            legendBox.setPos(plotArea.getLeftX() + (plotArea.getWidth() - legendBox.getWidth()) / 2,
                legendBox.getTopY());
            title.setPos(plotArea.getLeftX() + (plotArea.getWidth() - title.getWidth()) / 2,
                title.getTopY());

            // Output the chart
            viewer.Chart = c;

            //include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("clickable", "",
                "title='{dataSetName} in {xLabel}: {value}'");
        }
    }
}

[ASP.NET Web Forms - C# version] NetWebCharts\CSharpASP\linefill.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 line chart
    double[] data0 = {70, 73, 80, 90, 95, 93, 82, 77, 82, 101, 111, 115};
    double[] data1 = {90, 96, 89, 77, 82, 96, 109, 109, 99, 108, 96, 91};
    double[] data2 = {58, 34, 25, 49, 64, 10, 16, 40, 25, 49, 40, 22};

    // The labels for the line chart
    string[] labels = {"2008-01", "2008-02", "2008-03", "2008-04", "2008-05", "2008-06", "2008-07",
        "2008-08", "2008-09", "2008-10", "2008-11", "2008-12"};

    // Create a XYChart object of size 450 x 450 pixels
    XYChart c = new XYChart(450, 450);

    // Add a title to the chart using 15pt Arial Italic font.
    ChartDirector.TextBox title = c.addTitle("Inter-line Coloring", "Arial Italic", 15);

    // Add a legend box where the top-center is anchored to the horizontal center of the chart, just
    // under the title. Use horizontal layout and 10 points Arial Bold font, and transparent
    // background and border. Use line style legend key.
    LegendBox legendBox = c.addLegend(c.getWidth() / 2, title.getHeight(), false,
        "Arial Bold Italic", 10);
    legendBox.setBackground(Chart.Transparent, Chart.Transparent);
    legendBox.setAlignment(Chart.TopCenter);
    legendBox.setLineStyleKey();

    // Tentatively set the plotarea at (70, 65) and of (chart_width - 100) x (chart_height - 110) in
    // size. Use light grey (c0c0c0) border and horizontal and vertical grid lines.
    PlotArea plotArea = c.setPlotArea(70, 65, c.getWidth() - 100, c.getHeight() - 110, -1, -1,
        0xc0c0c0, 0xc0c0c0, -1);

    // Add a title to the y axis using 12pt Arial Bold Italic font
    c.yAxis().setTitle("Axis Title Placeholder", "Arial Bold Italic", 12);

    // Add a title to the x axis using 12pt Arial Bold Italic font
    c.xAxis().setTitle("Axis Title Placeholder", "Arial Bold Italic", 12);

    // Set the axes line width to 3 pixels
    c.xAxis().setWidth(3);
    c.yAxis().setWidth(3);

    // Set the labels on the x axis.
    c.xAxis().setLabels(labels);

    // Use 8 points Arial rotated by 90 degrees as the x-axis label font
    c.xAxis().setLabelStyle("Arial", 8, Chart.TextColor, 90);

    // Add a spline curve to the chart
    SplineLayer layer0 = c.addSplineLayer(data0, 0xff0000, "Data Set 0");
    layer0.setLineWidth(2);

    // Add a normal line to the chart
    LineLayer layer1 = c.addLineLayer(data1, 0x008800, "Data Set 1");
    layer1.setLineWidth(2);

    // Color the region between the above spline curve and normal line. Use the semi-transparent red
    // (80ff000000) if the spline curve is higher than the normal line, otherwise use
    // semi-transparent green (80008800)
    c.addInterLineLayer(layer0.getLine(), layer1.getLine(), unchecked((int)0x80ff0000),
        unchecked((int)0x80008800));

    // Add another normal line to the chart
    LineLayer layer2 = c.addLineLayer(data2, 0x0000ff, "Data Set 2");
    layer2.setLineWidth(2);

    // Add a horizontal mark line to the chart at y = 40
    Mark mark = c.yAxis().addMark(40, -1, "Threshold");
    mark.setLineWidth(2);

    // Set the mark line to purple (880088) dash line. Use white (ffffff) for the mark label.
    mark.setMarkColor(c.dashLineColor(0x880088), 0xffffff);

    // Put the mark label at the left side of the mark, with a purple (880088) background.
    mark.setAlignment(Chart.Left);
    mark.setBackground(0x880088);

    // Color the region between the above normal line and mark line. Use the semi-transparent blue
    // (800000ff) if the normal line is higher than the mark line, otherwise use semi-transparent
    // purple (80880088)
    c.addInterLineLayer(layer2.getLine(), mark.getLine(), unchecked((int)0x800000ff),
        unchecked((int)0x80880088));

    // Layout the legend box, so we can get its height
    c.layoutLegend();

    // Adjust the plot area size, such that the bounding box (inclusive of axes) is 10 pixels from
    // the left edge, just under the legend box, 25 pixels from the right edge, and 10 pixels from
    // the bottom edge.
    c.packPlotArea(10, legendBox.getTopY() + legendBox.getHeight(), c.getWidth() - 25, c.getHeight()
         - 10);

    // After determining the exact plot area position, we may adjust the legend box and the title
    // positions so that they are centered relative to the plot area (instead of the chart)
    legendBox.setPos(plotArea.getLeftX() + (plotArea.getWidth() - legendBox.getWidth()) / 2,
        legendBox.getTopY());
    title.setPos(plotArea.getLeftX() + (plotArea.getWidth() - title.getWidth()) / 2, title.getTopY()
        );

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

    // Include tool tip for the chart
    WebChartViewer1.ImageMap = c.getHTMLImageMap("", "",
        "title='{dataSetName} in {xLabel}: {value}'");
}

</script>

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

[ASP.NET Web Forms - VB Version] NetWebCharts\VBNetASP\linefill.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 line chart
    Dim data0() As Double = {70, 73, 80, 90, 95, 93, 82, 77, 82, 101, 111, 115}
    Dim data1() As Double = {90, 96, 89, 77, 82, 96, 109, 109, 99, 108, 96, 91}
    Dim data2() As Double = {58, 34, 25, 49, 64, 10, 16, 40, 25, 49, 40, 22}

    ' The labels for the line chart
    Dim labels() As String = {"2008-01", "2008-02", "2008-03", "2008-04", "2008-05", "2008-06", _
        "2008-07", "2008-08", "2008-09", "2008-10", "2008-11", "2008-12"}

    ' Create a XYChart object of size 450 x 450 pixels
    Dim c As XYChart = New XYChart(450, 450)

    ' Add a title to the chart using 15pt Arial Italic font.
    Dim title As ChartDirector.TextBox = c.addTitle("Inter-line Coloring", "Arial Italic", 15)

    ' Add a legend box where the top-center is anchored to the horizontal center of the chart, just
    ' under the title. Use horizontal layout and 10 points Arial Bold font, and transparent
    ' background and border. Use line style legend key.
    Dim legendBox As LegendBox = c.addLegend(c.getWidth() / 2, title.getHeight(), False, _
        "Arial Bold Italic", 10)
    legendBox.setBackground(Chart.Transparent, Chart.Transparent)
    legendBox.setAlignment(Chart.TopCenter)
    legendBox.setLineStyleKey()

    ' Tentatively set the plotarea at (70, 65) and of (chart_width - 100) x (chart_height - 110) in
    ' size. Use light grey (c0c0c0) border and horizontal and vertical grid lines.
    Dim plotArea As PlotArea = c.setPlotArea(70, 65, c.getWidth() - 100, c.getHeight() - 110, -1, _
        -1, &Hc0c0c0, &Hc0c0c0, -1)

    ' Add a title to the y axis using 12pt Arial Bold Italic font
    c.yAxis().setTitle("Axis Title Placeholder", "Arial Bold Italic", 12)

    ' Add a title to the x axis using 12pt Arial Bold Italic font
    c.xAxis().setTitle("Axis Title Placeholder", "Arial Bold Italic", 12)

    ' Set the axes line width to 3 pixels
    c.xAxis().setWidth(3)
    c.yAxis().setWidth(3)

    ' Set the labels on the x axis.
    c.xAxis().setLabels(labels)

    ' Use 8 points Arial rotated by 90 degrees as the x-axis label font
    c.xAxis().setLabelStyle("Arial", 8, Chart.TextColor, 90)

    ' Add a spline curve to the chart
    Dim layer0 As SplineLayer = c.addSplineLayer(data0, &Hff0000, "Data Set 0")
    layer0.setLineWidth(2)

    ' Add a normal line to the chart
    Dim layer1 As LineLayer = c.addLineLayer(data1, &H008800, "Data Set 1")
    layer1.setLineWidth(2)

    ' Color the region between the above spline curve and normal line. Use the semi-transparent red
    ' (80ff000000) if the spline curve is higher than the normal line, otherwise use
    ' semi-transparent green (80008800)
    c.addInterLineLayer(layer0.getLine(), layer1.getLine(), &H80ff0000, &H80008800)

    ' Add another normal line to the chart
    Dim layer2 As LineLayer = c.addLineLayer(data2, &H0000ff, "Data Set 2")
    layer2.setLineWidth(2)

    ' Add a horizontal mark line to the chart at y = 40
    Dim mark As Mark = c.yAxis().addMark(40, -1, "Threshold")
    mark.setLineWidth(2)

    ' Set the mark line to purple (880088) dash line. Use white (ffffff) for the mark label.
    mark.setMarkColor(c.dashLineColor(&H880088), &Hffffff)

    ' Put the mark label at the left side of the mark, with a purple (880088) background.
    mark.setAlignment(Chart.Left)
    mark.setBackground(&H880088)

    ' Color the region between the above normal line and mark line. Use the semi-transparent blue
    ' (800000ff) if the normal line is higher than the mark line, otherwise use semi-transparent
    ' purple (80880088)
    c.addInterLineLayer(layer2.getLine(), mark.getLine(), &H800000ff, &H80880088)

    ' Layout the legend box, so we can get its height
    c.layoutLegend()

    ' Adjust the plot area size, such that the bounding box (inclusive of axes) is 10 pixels from
    ' the left edge, just under the legend box, 25 pixels from the right edge, and 10 pixels from
    ' the bottom edge.
    c.packPlotArea(10, legendBox.getTopY() + legendBox.getHeight(), c.getWidth() - 25, _
        c.getHeight() - 10)

    ' After determining the exact plot area position, we may adjust the legend box and the title
    ' positions so that they are centered relative to the plot area (instead of the chart)
    legendBox.setPos(plotArea.getLeftX() + (plotArea.getWidth() - legendBox.getWidth()) / 2, _
        legendBox.getTopY())
    title.setPos(plotArea.getLeftX() + (plotArea.getWidth() - title.getWidth()) / 2, _
        title.getTopY())

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

    ' Include tool tip for the chart
    WebChartViewer1.ImageMap = c.getHTMLImageMap("", "", _
        "title='{dataSetName} in {xLabel}: {value}'")

End Sub

</script>

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

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

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

        //
        // Create chart
        //
        private void createChart(RazorChartViewer viewer)
        {
            // The data for the line chart
            double[] data0 = {70, 73, 80, 90, 95, 93, 82, 77, 82, 101, 111, 115};
            double[] data1 = {90, 96, 89, 77, 82, 96, 109, 109, 99, 108, 96, 91};
            double[] data2 = {58, 34, 25, 49, 64, 10, 16, 40, 25, 49, 40, 22};

            // The labels for the line chart
            string[] labels = {"2008-01", "2008-02", "2008-03", "2008-04", "2008-05", "2008-06",
                "2008-07", "2008-08", "2008-09", "2008-10", "2008-11", "2008-12"};

            // Create a XYChart object of size 450 x 450 pixels
            XYChart c = new XYChart(450, 450);

            // Add a title to the chart using 15pt Arial Italic font.
            ChartDirector.TextBox title = c.addTitle("Inter-line Coloring", "Arial Italic", 15);

            // Add a legend box where the top-center is anchored to the horizontal center of the chart,
            // just under the title. Use horizontal layout and 10 points Arial Bold font, and transparent
            // background and border. Use line style legend key.
            LegendBox legendBox = c.addLegend(c.getWidth() / 2, title.getHeight(), false,
                "Arial Bold Italic", 10);
            legendBox.setBackground(Chart.Transparent, Chart.Transparent);
            legendBox.setAlignment(Chart.TopCenter);
            legendBox.setLineStyleKey();

            // Tentatively set the plotarea at (70, 65) and of (chart_width - 100) x (chart_height - 110)
            // in size. Use light grey (c0c0c0) border and horizontal and vertical grid lines.
            PlotArea plotArea = c.setPlotArea(70, 65, c.getWidth() - 100, c.getHeight() - 110, -1, -1,
                0xc0c0c0, 0xc0c0c0, -1);

            // Add a title to the y axis using 12pt Arial Bold Italic font
            c.yAxis().setTitle("Axis Title Placeholder", "Arial Bold Italic", 12);

            // Add a title to the x axis using 12pt Arial Bold Italic font
            c.xAxis().setTitle("Axis Title Placeholder", "Arial Bold Italic", 12);

            // Set the axes line width to 3 pixels
            c.xAxis().setWidth(3);
            c.yAxis().setWidth(3);

            // Set the labels on the x axis.
            c.xAxis().setLabels(labels);

            // Use 8 points Arial rotated by 90 degrees as the x-axis label font
            c.xAxis().setLabelStyle("Arial", 8, Chart.TextColor, 90);

            // Add a spline curve to the chart
            SplineLayer layer0 = c.addSplineLayer(data0, 0xff0000, "Data Set 0");
            layer0.setLineWidth(2);

            // Add a normal line to the chart
            LineLayer layer1 = c.addLineLayer(data1, 0x008800, "Data Set 1");
            layer1.setLineWidth(2);

            // Color the region between the above spline curve and normal line. Use the semi-transparent
            // red (80ff000000) if the spline curve is higher than the normal line, otherwise use
            // semi-transparent green (80008800)
            c.addInterLineLayer(layer0.getLine(), layer1.getLine(), unchecked((int)0x80ff0000),
                unchecked((int)0x80008800));

            // Add another normal line to the chart
            LineLayer layer2 = c.addLineLayer(data2, 0x0000ff, "Data Set 2");
            layer2.setLineWidth(2);

            // Add a horizontal mark line to the chart at y = 40
            Mark mark = c.yAxis().addMark(40, -1, "Threshold");
            mark.setLineWidth(2);

            // Set the mark line to purple (880088) dash line. Use white (ffffff) for the mark label.
            mark.setMarkColor(c.dashLineColor(0x880088), 0xffffff);

            // Put the mark label at the left side of the mark, with a purple (880088) background.
            mark.setAlignment(Chart.Left);
            mark.setBackground(0x880088);

            // Color the region between the above normal line and mark line. Use the semi-transparent
            // blue (800000ff) if the normal line is higher than the mark line, otherwise use
            // semi-transparent purple (80880088)
            c.addInterLineLayer(layer2.getLine(), mark.getLine(), unchecked((int)0x800000ff),
                unchecked((int)0x80880088));

            // Layout the legend box, so we can get its height
            c.layoutLegend();

            // Adjust the plot area size, such that the bounding box (inclusive of axes) is 10 pixels
            // from the left edge, just under the legend box, 25 pixels from the right edge, and 10
            // pixels from the bottom edge.
            c.packPlotArea(10, legendBox.getTopY() + legendBox.getHeight(), c.getWidth() - 25,
                c.getHeight() - 10);

            // After determining the exact plot area position, we may adjust the legend box and the title
            // positions so that they are centered relative to the plot area (instead of the chart)
            legendBox.setPos(plotArea.getLeftX() + (plotArea.getWidth() - legendBox.getWidth()) / 2,
                legendBox.getTopY());
            title.setPos(plotArea.getLeftX() + (plotArea.getWidth() - title.getWidth()) / 2,
                title.getTopY());

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

            // Include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("", "", "title='{dataSetName} in {xLabel}: {value}'");
        }
    }
}

[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>