ChartDirector 6.2 (.NET Edition)

Multi-Symbol Line Chart




This example demonstrates a line with different symbols for different data points. It also demonstrates unevenly spaced data points on an auto-scaled true date/time axis, and automatic resizing of the plot area to fit the chart.

The chart in this example is created by using a line layer for the line, and using multiple scatter layers for different types of symbols. The scatter layers are created first using XYChart.addScatterLayer, followed by the line layer using XYChart.addLineLayer. This ensures the symbols stays on top of the line.

The ArrayMath utility, through the ArrayMath.selectEQZ and ArrayMath.sub methods, is used to select the subset of data to be used for various symbols.

Note that in this example, the data points are unevenly spaced, and the x coordinates are real date/time. The x coordinates are set into the scatter layer as the first argument to XYChart.addScatterLayer, and into the line layer using Layer.setXData. As the x-axis scale is not configured, ChartDirector auto-scales the x-axis to fit the data.

After the entire chart is configured, the XYChart.packPlotArea method is used to adjust the plot area size, so as to fit the plot area and the axes in a given bounding box.

Source Code Listing

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

namespace CSharpChartExplorer
{
    public class multisymbolline : DemoModule
    {
        //Name of demo module
        public string getName() { return "Multi-Symbol 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)
        {
            // In this example, the data points are unevenly spaced on the x-axis
            double[] dataY = {4.7, 4.7, 6.6, 2.2, 4.7, 4.0, 4.0, 5.1, 4.5, 4.5, 6.8, 4.5, 4, 2.1, 3,
                2.5, 2.5, 3.1};
            DateTime[] dataX = {new DateTime(1999, 7, 1), new DateTime(2000, 1, 1), new DateTime(
                2000, 2, 1), new DateTime(2000, 4, 1), new DateTime(2000, 5, 8), new DateTime(2000,
                7, 5), new DateTime(2001, 3, 5), new DateTime(2001, 4, 7), new DateTime(2001, 5, 9),
                new DateTime(2002, 2, 4), new DateTime(2002, 4, 4), new DateTime(2002, 5, 8),
                new DateTime(2002, 7, 7), new DateTime(2002, 8, 30), new DateTime(2003, 1, 2),
                new DateTime(2003, 2, 16), new DateTime(2003, 11, 6), new DateTime(2004, 1, 4)};

            // Data points are assigned different symbols based on point type
            double[] pointType = {0, 1, 0, 1, 2, 1, 0, 0, 1, 1, 2, 2, 1, 0, 2, 1, 2, 0};

            // Create a XYChart object of size 480 x 320 pixels. Use a vertical gradient color from
            // pale blue (e8f0f8) to sky blue (aaccff) spanning half the chart height as background.
            // Set border to blue (88aaee). Use rounded corners. Enable soft drop shadow.
            XYChart c = new XYChart(480, 320);
            c.setBackground(c.linearGradientColor(0, 0, 0, c.getHeight() / 2, 0xe8f0f8, 0xaaccff),
                0x88aaee);
            c.setRoundedFrame();
            c.setDropShadow();

            // Add a title to the chart using 15 points Arial Italic font. Set top/bottom margins to
            // 12 pixels.
            ChartDirector.TextBox title = c.addTitle("Multi-Symbol Line Chart Demo", "Arial Italic",
                15);
            title.setMargin2(0, 0, 12, 12);

            // Tentatively set the plotarea to 50 pixels from the left edge to allow for the y-axis,
            // and to just under the title. Set the width to 65 pixels less than the chart width,
            // and the height to reserve 90 pixels at the bottom for the x-axis and the legend box.
            // Use pale blue (e8f0f8) background, transparent border, and grey (888888) dotted
            // horizontal and vertical grid lines.
            c.setPlotArea(50, title.getHeight(), c.getWidth() - 65, c.getHeight() - title.getHeight(
                ) - 90, 0xe8f0f8, -1, Chart.Transparent, c.dashLineColor(0x888888, Chart.DotLine),
                -1);

            // Add a legend box where the bottom-center is anchored to the 12 pixels above the
            // bottom-center of the chart. Use horizontal layout and 8 points Arial font.
            LegendBox legendBox = c.addLegend(c.getWidth() / 2, c.getHeight() - 12, false,
                "Arial Bold", 8);
            legendBox.setAlignment(Chart.BottomCenter);

            // Set the legend box background and border to pale blue (e8f0f8) and bluish grey
            // (445566)
            legendBox.setBackground(0xe8f0f8, 0x445566);

            // Use rounded corners of 5 pixel radius for the legend box
            legendBox.setRoundedCorners(5);

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

            // Set y-axis title to use 10 points Arial Bold Italic font
            c.yAxis().setTitle("Axis Title Placeholder", "Arial Bold Italic", 10);

            // Set axis labels to use Arial Bold font
            c.yAxis().setLabelStyle("Arial Bold");
            c.xAxis().setLabelStyle("Arial Bold");

            // We add the different data symbols using scatter layers. The scatter layers are added
            // before the line layer to make sure the data symbols stay on top of the line layer.

            // We select the points with pointType = 0 (the non-selected points will be set to
            // NoValue), and use yellow (ffff00) 15 pixels high 5 pointed star shape symbols for the
            // points. (This example uses both x and y coordinates. For charts that have no x
            // explicitly coordinates, use an empty array as dataX.)
            c.addScatterLayer(Chart.CTime(dataX), new ArrayMath(dataY).selectEQZ(pointType,
                Chart.NoValue).result(), "Point Type 0", Chart.StarShape(5), 15, 0xffff00);

            // Similar to above, we select the points with pointType - 1 = 0 and use green (ff00) 13
            // pixels high six-sided polygon as symbols.
            c.addScatterLayer(Chart.CTime(dataX), new ArrayMath(dataY).selectEQZ(new ArrayMath(
                pointType).sub(1).result(), Chart.NoValue).result(), "Point Type 1",
                Chart.PolygonShape(6), 13, 0x00ff00);

            // Similar to above, we select the points with pointType - 2 = 0 and use red (ff0000) 13
            // pixels high X shape as symbols.
            c.addScatterLayer(Chart.CTime(dataX), new ArrayMath(dataY).selectEQZ(new ArrayMath(
                pointType).sub(2).result(), Chart.NoValue).result(), "Point Type 2",
                Chart.Cross2Shape(), 13, 0xff0000);

            // Finally, add a blue (0000ff) line layer with line width of 2 pixels
            LineLayer layer = c.addLineLayer(dataY, 0x0000ff);
            layer.setXData(Chart.CTime(dataX));
            layer.setLineWidth(2);

            // Adjust the plot area size, such that the bounding box (inclusive of axes) is 10
            // pixels from the left edge, just below the title, 25 pixels from the right edge, and 8
            // pixels above the legend box.
            c.packPlotArea(10, title.getHeight(), c.getWidth() - 25, c.layoutLegend().getTopY() - 8)
                ;

            // Output the chart
            viewer.Chart = c;

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

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

Public Class multisymbolline
    Implements DemoModule

    'Name of demo module
    Public Function getName() As String Implements DemoModule.getName
        Return "Multi-Symbol 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

        ' In this example, the data points are unevenly spaced on the x-axis
        Dim dataY() As Double = {4.7, 4.7, 6.6, 2.2, 4.7, 4.0, 4.0, 5.1, 4.5, 4.5, 6.8, 4.5, 4, _
            2.1, 3, 2.5, 2.5, 3.1}
        Dim dataX() As Date = {DateSerial(1999, 7, 1), DateSerial(2000, 1, 1), DateSerial(2000, 2, _
            1), DateSerial(2000, 4, 1), DateSerial(2000, 5, 8), DateSerial(2000, 7, 5), _
            DateSerial(2001, 3, 5), DateSerial(2001, 4, 7), DateSerial(2001, 5, 9), DateSerial( _
            2002, 2, 4), DateSerial(2002, 4, 4), DateSerial(2002, 5, 8), DateSerial(2002, 7, 7), _
            DateSerial(2002, 8, 30), DateSerial(2003, 1, 2), DateSerial(2003, 2, 16), DateSerial( _
            2003, 11, 6), DateSerial(2004, 1, 4)}

        ' Data points are assigned different symbols based on point type
        Dim pointType() As Double = {0, 1, 0, 1, 2, 1, 0, 0, 1, 1, 2, 2, 1, 0, 2, 1, 2, 0}

        ' Create a XYChart object of size 480 x 320 pixels. Use a vertical gradient color from pale
        ' blue (e8f0f8) to sky blue (aaccff) spanning half the chart height as background. Set
        ' border to blue (88aaee). Use rounded corners. Enable soft drop shadow.
        Dim c As XYChart = New XYChart(480, 320)
        c.setBackground(c.linearGradientColor(0, 0, 0, c.getHeight() / 2, &He8f0f8, &Haaccff), _
            &H88aaee)
        c.setRoundedFrame()
        c.setDropShadow()

        ' Add a title to the chart using 15 points Arial Italic font. Set top/bottom margins to 12
        ' pixels.
        Dim title As ChartDirector.TextBox = c.addTitle("Multi-Symbol Line Chart Demo", _
            "Arial Italic", 15)
        title.setMargin2(0, 0, 12, 12)

        ' Tentatively set the plotarea to 50 pixels from the left edge to allow for the y-axis, and
        ' to just under the title. Set the width to 65 pixels less than the chart width, and the
        ' height to reserve 90 pixels at the bottom for the x-axis and the legend box. Use pale blue
        ' (e8f0f8) background, transparent border, and grey (888888) dotted horizontal and vertical
        ' grid lines.
        c.setPlotArea(50, title.getHeight(), c.getWidth() - 65, c.getHeight() - title.getHeight() _
             - 90, &He8f0f8, -1, Chart.Transparent, c.dashLineColor(&H888888, Chart.DotLine), -1)

        ' Add a legend box where the bottom-center is anchored to the 12 pixels above the
        ' bottom-center of the chart. Use horizontal layout and 8 points Arial font.
        Dim legendBox As LegendBox = c.addLegend(c.getWidth() / 2, c.getHeight() - 12, False, _
            "Arial Bold", 8)
        legendBox.setAlignment(Chart.BottomCenter)

        ' Set the legend box background and border to pale blue (e8f0f8) and bluish grey (445566)
        legendBox.setBackground(&He8f0f8, &H445566)

        ' Use rounded corners of 5 pixel radius for the legend box
        legendBox.setRoundedCorners(5)

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

        ' Set y-axis title to use 10 points Arial Bold Italic font
        c.yAxis().setTitle("Axis Title Placeholder", "Arial Bold Italic", 10)

        ' Set axis labels to use Arial Bold font
        c.yAxis().setLabelStyle("Arial Bold")
        c.xAxis().setLabelStyle("Arial Bold")

        ' We add the different data symbols using scatter layers. The scatter layers are added
        ' before the line layer to make sure the data symbols stay on top of the line layer.

        ' We select the points with pointType = 0 (the non-selected points will be set to NoValue),
        ' and use yellow (ffff00) 15 pixels high 5 pointed star shape symbols for the points. (This
        ' example uses both x and y coordinates. For charts that have no x explicitly coordinates,
        ' use an empty array as dataX.)
        c.addScatterLayer(Chart.CTime(dataX), New ArrayMath(dataY).selectEQZ(pointType, _
            Chart.NoValue).result(), "Point Type 0", Chart.StarShape(5), 15, &Hffff00)

        ' Similar to above, we select the points with pointType - 1 = 0 and use green (ff00) 13
        ' pixels high six-sided polygon as symbols.
        c.addScatterLayer(Chart.CTime(dataX), New ArrayMath(dataY).selectEQZ(New ArrayMath( _
            pointType).sub(1).result(), Chart.NoValue).result(), "Point Type 1", _
            Chart.PolygonShape(6), 13, &H00ff00)

        ' Similar to above, we select the points with pointType - 2 = 0 and use red (ff0000) 13
        ' pixels high X shape as symbols.
        c.addScatterLayer(Chart.CTime(dataX), New ArrayMath(dataY).selectEQZ(New ArrayMath( _
            pointType).sub(2).result(), Chart.NoValue).result(), "Point Type 2", _
            Chart.Cross2Shape(), 13, &Hff0000)

        ' Finally, add a blue (0000ff) line layer with line width of 2 pixels
        Dim layer As LineLayer = c.addLineLayer(dataY, &H0000ff)
        layer.setXData(Chart.CTime(dataX))
        layer.setLineWidth(2)

        ' Adjust the plot area size, such that the bounding box (inclusive of axes) is 10 pixels
        ' from the left edge, just below the title, 25 pixels from the right edge, and 8 pixels
        ' above the legend box.
        c.packPlotArea(10, title.getHeight(), c.getWidth() - 25, c.layoutLegend().getTopY() - 8)

        ' Output the chart
        viewer.Chart = c

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

    End Sub

End Class

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

namespace CSharpWPFDemo
{
    public class multisymbolline : DemoModule
    {
        //Name of demo module
        public string getName() { return "Multi-Symbol 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)
        {
            // In this example, the data points are unevenly spaced on the x-axis
            double[] dataY = {4.7, 4.7, 6.6, 2.2, 4.7, 4.0, 4.0, 5.1, 4.5, 4.5, 6.8, 4.5, 4, 2.1, 3,
                2.5, 2.5, 3.1};
            DateTime[] dataX = {new DateTime(1999, 7, 1), new DateTime(2000, 1, 1), new DateTime(
                2000, 2, 1), new DateTime(2000, 4, 1), new DateTime(2000, 5, 8), new DateTime(2000,
                7, 5), new DateTime(2001, 3, 5), new DateTime(2001, 4, 7), new DateTime(2001, 5, 9),
                new DateTime(2002, 2, 4), new DateTime(2002, 4, 4), new DateTime(2002, 5, 8),
                new DateTime(2002, 7, 7), new DateTime(2002, 8, 30), new DateTime(2003, 1, 2),
                new DateTime(2003, 2, 16), new DateTime(2003, 11, 6), new DateTime(2004, 1, 4)};

            // Data points are assigned different symbols based on point type
            double[] pointType = {0, 1, 0, 1, 2, 1, 0, 0, 1, 1, 2, 2, 1, 0, 2, 1, 2, 0};

            // Create a XYChart object of size 480 x 320 pixels. Use a vertical gradient color from
            // pale blue (e8f0f8) to sky blue (aaccff) spanning half the chart height as background.
            // Set border to blue (88aaee). Use rounded corners. Enable soft drop shadow.
            XYChart c = new XYChart(480, 320);
            c.setBackground(c.linearGradientColor(0, 0, 0, c.getHeight() / 2, 0xe8f0f8, 0xaaccff),
                0x88aaee);
            c.setRoundedFrame();
            c.setDropShadow();

            // Add a title to the chart using 15 points Arial Italic font. Set top/bottom margins to
            // 12 pixels.
            ChartDirector.TextBox title = c.addTitle("Multi-Symbol Line Chart Demo", "Arial Italic",
                15);
            title.setMargin2(0, 0, 12, 12);

            // Tentatively set the plotarea to 50 pixels from the left edge to allow for the y-axis,
            // and to just under the title. Set the width to 65 pixels less than the chart width,
            // and the height to reserve 90 pixels at the bottom for the x-axis and the legend box.
            // Use pale blue (e8f0f8) background, transparent border, and grey (888888) dotted
            // horizontal and vertical grid lines.
            c.setPlotArea(50, title.getHeight(), c.getWidth() - 65, c.getHeight() - title.getHeight(
                ) - 90, 0xe8f0f8, -1, Chart.Transparent, c.dashLineColor(0x888888, Chart.DotLine),
                -1);

            // Add a legend box where the bottom-center is anchored to the 12 pixels above the
            // bottom-center of the chart. Use horizontal layout and 8 points Arial font.
            LegendBox legendBox = c.addLegend(c.getWidth() / 2, c.getHeight() - 12, false,
                "Arial Bold", 8);
            legendBox.setAlignment(Chart.BottomCenter);

            // Set the legend box background and border to pale blue (e8f0f8) and bluish grey
            // (445566)
            legendBox.setBackground(0xe8f0f8, 0x445566);

            // Use rounded corners of 5 pixel radius for the legend box
            legendBox.setRoundedCorners(5);

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

            // Set y-axis title to use 10 points Arial Bold Italic font
            c.yAxis().setTitle("Axis Title Placeholder", "Arial Bold Italic", 10);

            // Set axis labels to use Arial Bold font
            c.yAxis().setLabelStyle("Arial Bold");
            c.xAxis().setLabelStyle("Arial Bold");

            // We add the different data symbols using scatter layers. The scatter layers are added
            // before the line layer to make sure the data symbols stay on top of the line layer.

            // We select the points with pointType = 0 (the non-selected points will be set to
            // NoValue), and use yellow (ffff00) 15 pixels high 5 pointed star shape symbols for the
            // points. (This example uses both x and y coordinates. For charts that have no x
            // explicitly coordinates, use an empty array as dataX.)
            c.addScatterLayer(Chart.CTime(dataX), new ArrayMath(dataY).selectEQZ(pointType,
                Chart.NoValue).result(), "Point Type 0", Chart.StarShape(5), 15, 0xffff00);

            // Similar to above, we select the points with pointType - 1 = 0 and use green (ff00) 13
            // pixels high six-sided polygon as symbols.
            c.addScatterLayer(Chart.CTime(dataX), new ArrayMath(dataY).selectEQZ(new ArrayMath(
                pointType).sub(1).result(), Chart.NoValue).result(), "Point Type 1",
                Chart.PolygonShape(6), 13, 0x00ff00);

            // Similar to above, we select the points with pointType - 2 = 0 and use red (ff0000) 13
            // pixels high X shape as symbols.
            c.addScatterLayer(Chart.CTime(dataX), new ArrayMath(dataY).selectEQZ(new ArrayMath(
                pointType).sub(2).result(), Chart.NoValue).result(), "Point Type 2",
                Chart.Cross2Shape(), 13, 0xff0000);

            // Finally, add a blue (0000ff) line layer with line width of 2 pixels
            LineLayer layer = c.addLineLayer(dataY, 0x0000ff);
            layer.setXData(Chart.CTime(dataX));
            layer.setLineWidth(2);

            // Adjust the plot area size, such that the bounding box (inclusive of axes) is 10
            // pixels from the left edge, just below the title, 25 pixels from the right edge, and 8
            // pixels above the legend box.
            c.packPlotArea(10, title.getHeight(), c.getWidth() - 25, c.layoutLegend().getTopY() - 8)
                ;

            // Output the chart
            viewer.Chart = c;

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

[ASP.NET Web Forms - C# version] NetWebCharts\CSharpASP\multisymbolline.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)
{
    // In this example, the data points are unevenly spaced on the x-axis
    double[] dataY = {4.7, 4.7, 6.6, 2.2, 4.7, 4.0, 4.0, 5.1, 4.5, 4.5, 6.8, 4.5, 4, 2.1, 3, 2.5,
        2.5, 3.1};
    DateTime[] dataX = {new DateTime(1999, 7, 1), new DateTime(2000, 1, 1), new DateTime(2000, 2, 1
        ), new DateTime(2000, 4, 1), new DateTime(2000, 5, 8), new DateTime(2000, 7, 5),
        new DateTime(2001, 3, 5), new DateTime(2001, 4, 7), new DateTime(2001, 5, 9), new DateTime(
        2002, 2, 4), new DateTime(2002, 4, 4), new DateTime(2002, 5, 8), new DateTime(2002, 7, 7),
        new DateTime(2002, 8, 30), new DateTime(2003, 1, 2), new DateTime(2003, 2, 16),
        new DateTime(2003, 11, 6), new DateTime(2004, 1, 4)};

    // Data points are assigned different symbols based on point type
    double[] pointType = {0, 1, 0, 1, 2, 1, 0, 0, 1, 1, 2, 2, 1, 0, 2, 1, 2, 0};

    // Create a XYChart object of size 480 x 320 pixels. Use a vertical gradient color from pale
    // blue (e8f0f8) to sky blue (aaccff) spanning half the chart height as background. Set border
    // to blue (88aaee). Use rounded corners. Enable soft drop shadow.
    XYChart c = new XYChart(480, 320);
    c.setBackground(c.linearGradientColor(0, 0, 0, c.getHeight() / 2, 0xe8f0f8, 0xaaccff), 0x88aaee)
        ;
    c.setRoundedFrame();
    c.setDropShadow();

    // Add a title to the chart using 15 points Arial Italic font. Set top/bottom margins to 12
    // pixels.
    ChartDirector.TextBox title = c.addTitle("Multi-Symbol Line Chart Demo", "Arial Italic", 15);
    title.setMargin2(0, 0, 12, 12);

    // Tentatively set the plotarea to 50 pixels from the left edge to allow for the y-axis, and to
    // just under the title. Set the width to 65 pixels less than the chart width, and the height to
    // reserve 90 pixels at the bottom for the x-axis and the legend box. Use pale blue (e8f0f8)
    // background, transparent border, and grey (888888) dotted horizontal and vertical grid lines.
    c.setPlotArea(50, title.getHeight(), c.getWidth() - 65, c.getHeight() - title.getHeight() - 90,
        0xe8f0f8, -1, Chart.Transparent, c.dashLineColor(0x888888, Chart.DotLine), -1);

    // Add a legend box where the bottom-center is anchored to the 12 pixels above the bottom-center
    // of the chart. Use horizontal layout and 8 points Arial font.
    LegendBox legendBox = c.addLegend(c.getWidth() / 2, c.getHeight() - 12, false, "Arial Bold", 8);
    legendBox.setAlignment(Chart.BottomCenter);

    // Set the legend box background and border to pale blue (e8f0f8) and bluish grey (445566)
    legendBox.setBackground(0xe8f0f8, 0x445566);

    // Use rounded corners of 5 pixel radius for the legend box
    legendBox.setRoundedCorners(5);

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

    // Set y-axis title to use 10 points Arial Bold Italic font
    c.yAxis().setTitle("Axis Title Placeholder", "Arial Bold Italic", 10);

    // Set axis labels to use Arial Bold font
    c.yAxis().setLabelStyle("Arial Bold");
    c.xAxis().setLabelStyle("Arial Bold");

    // We add the different data symbols using scatter layers. The scatter layers are added before
    // the line layer to make sure the data symbols stay on top of the line layer.

    // We select the points with pointType = 0 (the non-selected points will be set to NoValue), and
    // use yellow (ffff00) 15 pixels high 5 pointed star shape symbols for the points. (This example
    // uses both x and y coordinates. For charts that have no x explicitly coordinates, use an empty
    // array as dataX.)
    c.addScatterLayer(Chart.CTime(dataX), new ArrayMath(dataY).selectEQZ(pointType, Chart.NoValue
        ).result(), "Point Type 0", Chart.StarShape(5), 15, 0xffff00);

    // Similar to above, we select the points with pointType - 1 = 0 and use green (ff00) 13 pixels
    // high six-sided polygon as symbols.
    c.addScatterLayer(Chart.CTime(dataX), new ArrayMath(dataY).selectEQZ(new ArrayMath(pointType
        ).sub(1).result(), Chart.NoValue).result(), "Point Type 1", Chart.PolygonShape(6), 13,
        0x00ff00);

    // Similar to above, we select the points with pointType - 2 = 0 and use red (ff0000) 13 pixels
    // high X shape as symbols.
    c.addScatterLayer(Chart.CTime(dataX), new ArrayMath(dataY).selectEQZ(new ArrayMath(pointType
        ).sub(2).result(), Chart.NoValue).result(), "Point Type 2", Chart.Cross2Shape(), 13,
        0xff0000);

    // Finally, add a blue (0000ff) line layer with line width of 2 pixels
    LineLayer layer = c.addLineLayer(dataY, 0x0000ff);
    layer.setXData(Chart.CTime(dataX));
    layer.setLineWidth(2);

    // Adjust the plot area size, such that the bounding box (inclusive of axes) is 10 pixels from
    // the left edge, just below the title, 25 pixels from the right edge, and 8 pixels above the
    // legend box.
    c.packPlotArea(10, title.getHeight(), c.getWidth() - 25, c.layoutLegend().getTopY() - 8);

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

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

</script>

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

[ASP.NET Web Forms - VB Version] NetWebCharts\VBNetASP\multisymbolline.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)

    ' In this example, the data points are unevenly spaced on the x-axis
    Dim dataY() As Double = {4.7, 4.7, 6.6, 2.2, 4.7, 4.0, 4.0, 5.1, 4.5, 4.5, 6.8, 4.5, 4, 2.1, _
        3, 2.5, 2.5, 3.1}
    Dim dataX() As Date = {DateSerial(1999, 7, 1), DateSerial(2000, 1, 1), DateSerial(2000, 2, 1), _
        DateSerial(2000, 4, 1), DateSerial(2000, 5, 8), DateSerial(2000, 7, 5), DateSerial(2001, _
        3, 5), DateSerial(2001, 4, 7), DateSerial(2001, 5, 9), DateSerial(2002, 2, 4), DateSerial( _
        2002, 4, 4), DateSerial(2002, 5, 8), DateSerial(2002, 7, 7), DateSerial(2002, 8, 30), _
        DateSerial(2003, 1, 2), DateSerial(2003, 2, 16), DateSerial(2003, 11, 6), DateSerial(2004, _
        1, 4)}

    ' Data points are assigned different symbols based on point type
    Dim pointType() As Double = {0, 1, 0, 1, 2, 1, 0, 0, 1, 1, 2, 2, 1, 0, 2, 1, 2, 0}

    ' Create a XYChart object of size 480 x 320 pixels. Use a vertical gradient color from pale blue
    ' (e8f0f8) to sky blue (aaccff) spanning half the chart height as background. Set border to blue
    ' (88aaee). Use rounded corners. Enable soft drop shadow.
    Dim c As XYChart = New XYChart(480, 320)
    c.setBackground(c.linearGradientColor(0, 0, 0, c.getHeight() / 2, &He8f0f8, &Haaccff), _
        &H88aaee)
    c.setRoundedFrame()
    c.setDropShadow()

    ' Add a title to the chart using 15 points Arial Italic font. Set top/bottom margins to 12
    ' pixels.
    Dim title As ChartDirector.TextBox = c.addTitle("Multi-Symbol Line Chart Demo", _
        "Arial Italic", 15)
    title.setMargin2(0, 0, 12, 12)

    ' Tentatively set the plotarea to 50 pixels from the left edge to allow for the y-axis, and to
    ' just under the title. Set the width to 65 pixels less than the chart width, and the height to
    ' reserve 90 pixels at the bottom for the x-axis and the legend box. Use pale blue (e8f0f8)
    ' background, transparent border, and grey (888888) dotted horizontal and vertical grid lines.
    c.setPlotArea(50, title.getHeight(), c.getWidth() - 65, c.getHeight() - title.getHeight() - _
        90, &He8f0f8, -1, Chart.Transparent, c.dashLineColor(&H888888, Chart.DotLine), -1)

    ' Add a legend box where the bottom-center is anchored to the 12 pixels above the bottom-center
    ' of the chart. Use horizontal layout and 8 points Arial font.
    Dim legendBox As LegendBox = c.addLegend(c.getWidth() / 2, c.getHeight() - 12, False, _
        "Arial Bold", 8)
    legendBox.setAlignment(Chart.BottomCenter)

    ' Set the legend box background and border to pale blue (e8f0f8) and bluish grey (445566)
    legendBox.setBackground(&He8f0f8, &H445566)

    ' Use rounded corners of 5 pixel radius for the legend box
    legendBox.setRoundedCorners(5)

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

    ' Set y-axis title to use 10 points Arial Bold Italic font
    c.yAxis().setTitle("Axis Title Placeholder", "Arial Bold Italic", 10)

    ' Set axis labels to use Arial Bold font
    c.yAxis().setLabelStyle("Arial Bold")
    c.xAxis().setLabelStyle("Arial Bold")

    ' We add the different data symbols using scatter layers. The scatter layers are added before
    ' the line layer to make sure the data symbols stay on top of the line layer.

    ' We select the points with pointType = 0 (the non-selected points will be set to NoValue), and
    ' use yellow (ffff00) 15 pixels high 5 pointed star shape symbols for the points. (This example
    ' uses both x and y coordinates. For charts that have no x explicitly coordinates, use an empty
    ' array as dataX.)
    c.addScatterLayer(Chart.CTime(dataX), New ArrayMath(dataY).selectEQZ(pointType, Chart.NoValue _
        ).result(), "Point Type 0", Chart.StarShape(5), 15, &Hffff00)

    ' Similar to above, we select the points with pointType - 1 = 0 and use green (ff00) 13 pixels
    ' high six-sided polygon as symbols.
    c.addScatterLayer(Chart.CTime(dataX), New ArrayMath(dataY).selectEQZ(New ArrayMath(pointType _
        ).sub(1).result(), Chart.NoValue).result(), "Point Type 1", Chart.PolygonShape(6), 13, _
        &H00ff00)

    ' Similar to above, we select the points with pointType - 2 = 0 and use red (ff0000) 13 pixels
    ' high X shape as symbols.
    c.addScatterLayer(Chart.CTime(dataX), New ArrayMath(dataY).selectEQZ(New ArrayMath(pointType _
        ).sub(2).result(), Chart.NoValue).result(), "Point Type 2", Chart.Cross2Shape(), 13, _
        &Hff0000)

    ' Finally, add a blue (0000ff) line layer with line width of 2 pixels
    Dim layer As LineLayer = c.addLineLayer(dataY, &H0000ff)
    layer.setXData(Chart.CTime(dataX))
    layer.setLineWidth(2)

    ' Adjust the plot area size, such that the bounding box (inclusive of axes) is 10 pixels from
    ' the left edge, just below the title, 25 pixels from the right edge, and 8 pixels above the
    ' legend box.
    c.packPlotArea(10, title.getHeight(), c.getWidth() - 25, c.layoutLegend().getTopY() - 8)

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

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

End Sub

</script>

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

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

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

        //
        // Create chart
        //
        private void createChart(RazorChartViewer viewer)
        {
            // In this example, the data points are unevenly spaced on the x-axis
            double[] dataY = {4.7, 4.7, 6.6, 2.2, 4.7, 4.0, 4.0, 5.1, 4.5, 4.5, 6.8, 4.5, 4, 2.1, 3, 2.5,
                2.5, 3.1};
            DateTime[] dataX = {new DateTime(1999, 7, 1), new DateTime(2000, 1, 1), new DateTime(2000, 2,
                1), new DateTime(2000, 4, 1), new DateTime(2000, 5, 8), new DateTime(2000, 7, 5),
                new DateTime(2001, 3, 5), new DateTime(2001, 4, 7), new DateTime(2001, 5, 9),
                new DateTime(2002, 2, 4), new DateTime(2002, 4, 4), new DateTime(2002, 5, 8),
                new DateTime(2002, 7, 7), new DateTime(2002, 8, 30), new DateTime(2003, 1, 2),
                new DateTime(2003, 2, 16), new DateTime(2003, 11, 6), new DateTime(2004, 1, 4)};

            // Data points are assigned different symbols based on point type
            double[] pointType = {0, 1, 0, 1, 2, 1, 0, 0, 1, 1, 2, 2, 1, 0, 2, 1, 2, 0};

            // Create a XYChart object of size 480 x 320 pixels. Use a vertical gradient color from pale
            // blue (e8f0f8) to sky blue (aaccff) spanning half the chart height as background. Set
            // border to blue (88aaee). Use rounded corners. Enable soft drop shadow.
            XYChart c = new XYChart(480, 320);
            c.setBackground(c.linearGradientColor(0, 0, 0, c.getHeight() / 2, 0xe8f0f8, 0xaaccff),
                0x88aaee);
            c.setRoundedFrame();
            c.setDropShadow();

            // Add a title to the chart using 15 points Arial Italic font. Set top/bottom margins to 12
            // pixels.
            ChartDirector.TextBox title = c.addTitle("Multi-Symbol Line Chart Demo", "Arial Italic", 15);
            title.setMargin2(0, 0, 12, 12);

            // Tentatively set the plotarea to 50 pixels from the left edge to allow for the y-axis, and
            // to just under the title. Set the width to 65 pixels less than the chart width, and the
            // height to reserve 90 pixels at the bottom for the x-axis and the legend box. Use pale blue
            // (e8f0f8) background, transparent border, and grey (888888) dotted horizontal and vertical
            // grid lines.
            c.setPlotArea(50, title.getHeight(), c.getWidth() - 65, c.getHeight() - title.getHeight() -
                90, 0xe8f0f8, -1, Chart.Transparent, c.dashLineColor(0x888888, Chart.DotLine), -1);

            // Add a legend box where the bottom-center is anchored to the 12 pixels above the
            // bottom-center of the chart. Use horizontal layout and 8 points Arial font.
            LegendBox legendBox = c.addLegend(c.getWidth() / 2, c.getHeight() - 12, false, "Arial Bold",
                8);
            legendBox.setAlignment(Chart.BottomCenter);

            // Set the legend box background and border to pale blue (e8f0f8) and bluish grey (445566)
            legendBox.setBackground(0xe8f0f8, 0x445566);

            // Use rounded corners of 5 pixel radius for the legend box
            legendBox.setRoundedCorners(5);

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

            // Set y-axis title to use 10 points Arial Bold Italic font
            c.yAxis().setTitle("Axis Title Placeholder", "Arial Bold Italic", 10);

            // Set axis labels to use Arial Bold font
            c.yAxis().setLabelStyle("Arial Bold");
            c.xAxis().setLabelStyle("Arial Bold");

            // We add the different data symbols using scatter layers. The scatter layers are added
            // before the line layer to make sure the data symbols stay on top of the line layer.

            // We select the points with pointType = 0 (the non-selected points will be set to NoValue),
            // and use yellow (ffff00) 15 pixels high 5 pointed star shape symbols for the points. (This
            // example uses both x and y coordinates. For charts that have no x explicitly coordinates,
            // use an empty array as dataX.)
            c.addScatterLayer(Chart.CTime(dataX), new ArrayMath(dataY).selectEQZ(pointType, Chart.NoValue
                ).result(), "Point Type 0", Chart.StarShape(5), 15, 0xffff00);

            // Similar to above, we select the points with pointType - 1 = 0 and use green (ff00) 13
            // pixels high six-sided polygon as symbols.
            c.addScatterLayer(Chart.CTime(dataX), new ArrayMath(dataY).selectEQZ(new ArrayMath(pointType
                ).sub(1).result(), Chart.NoValue).result(), "Point Type 1", Chart.PolygonShape(6), 13,
                0x00ff00);

            // Similar to above, we select the points with pointType - 2 = 0 and use red (ff0000) 13
            // pixels high X shape as symbols.
            c.addScatterLayer(Chart.CTime(dataX), new ArrayMath(dataY).selectEQZ(new ArrayMath(pointType
                ).sub(2).result(), Chart.NoValue).result(), "Point Type 2", Chart.Cross2Shape(), 13,
                0xff0000);

            // Finally, add a blue (0000ff) line layer with line width of 2 pixels
            LineLayer layer = c.addLineLayer(dataY, 0x0000ff);
            layer.setXData(Chart.CTime(dataX));
            layer.setLineWidth(2);

            // Adjust the plot area size, such that the bounding box (inclusive of axes) is 10 pixels
            // from the left edge, just below the title, 25 pixels from the right edge, and 8 pixels
            // above the legend box.
            c.packPlotArea(10, title.getHeight(), c.getWidth() - 25, c.layoutLegend().getTopY() - 8);

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

            // Include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("", "", "title='{x|mmm dd, yyyy}: {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>