Line Chart

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Short Description

The Line Chart is represented by the LineSeriesView object, which belongs to Point and Line Series Views. This view is useful when you need to show trends for several series on the same diagram, and to compare the values of several series for the same points arguments.

A Line chart is shown in the image below. Note that this chart type is based upon the XYDiagram, so it can be rotated to show lines either vertically or horizontally.

SeriesView_LineSeries.png

Chart Type Characteristics

The table below lists the main characteristics of this chart type.

Feature Value
Series View type LineSeriesView
Diagram type 2D-XYDiagram
Number of arguments per series point 1
Number of values per series point 1
NOTE

For information on which chart types can be combined with the Line Chart, refer to the Series Views Compatibility document.

Example

The following example demonstrates how to create a ChartControl with a series of the LineSeriesView type, and add this chart to a form at runtime. Before proceeding with this example, first create a Windows Forms Application in Visual Studio, and include all necessary assemblies to the References list of your project.

Then, add the following code to the Form.Load event handler.

using System;
using System.Windows.Forms;
using DevExpress.XtraCharts;
// ...

private void Form1_Load(object sender, EventArgs e) {
    // Create a new chart.
    ChartControl lineChart = new ChartControl();

    // Create a line series.
    Series series1 = new Series("Series 1", ViewType.Line);

    // Add points to it.
    series1.Points.Add(new SeriesPoint(1, 2));
    series1.Points.Add(new SeriesPoint(2, 12));
    series1.Points.Add(new SeriesPoint(3, 14));
    series1.Points.Add(new SeriesPoint(4, 17));

    // Add the series to the chart.
    lineChart.Series.Add(series1);

    // Set the numerical argument scale types for the series,
    // as it is qualitative, by default.
    series1.ArgumentScaleType = ScaleType.Numerical;

    // Access the view-type-specific options of the series.
    ((LineSeriesView)series1.View).MarkerVisibility = DevExpress.Utils.DefaultBoolean.True;
    ((LineSeriesView)series1.View).LineMarkerOptions.Kind = MarkerKind.Triangle;
    ((LineSeriesView)series1.View).LineStyle.DashStyle = DashStyle.Dash;

    // Access the type-specific options of the diagram.
    ((XYDiagram)lineChart.Diagram).EnableAxisXZooming = true;

    // Hide the legend (if necessary).
    lineChart.Legend.Visibility = DevExpress.Utils.DefaultBoolean.False;

    // Add a title to the chart (if necessary).
    lineChart.Titles.Add(new ChartTitle());
    lineChart.Titles[0].Text = "A Line Chart";

    // Add the chart to the form.
    lineChart.Dock = DockStyle.Fill;
    this.Controls.Add(lineChart);
}
TIP

A complete sample project is available in the DevExpress Code Examples database at http://www.devexpress.com/example=E1208.

See Also