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IntervalOptionsBase.Pattern Property

Gets or sets a format string that configures text for the interval axis labels and crosshair labels.

Namespace: DevExpress.XtraCharts

Assembly: DevExpress.XtraCharts.v22.2.dll

NuGet Package: DevExpress.Charts


public string Pattern { get; set; }

Property Value

Type Description

A format string.


This pattern is applied when GridLayoutMode (NumericIntervalOptions.GridLayoutMode, DateTimeScaleOptionsBase.GridLayoutMode and QualitativeScaleOptions.GridLayoutMode) is GridAndLabelCentered or GridShiftedLabelCentered. Otherwise, use the AxisLabel.TextPattern property.

Patterns can contain regular text (displayed as is) and value placeholders in braces. To format numeric and date/time values, you can apply Format Specifiers. Use a colon to separate a placeholder and its format specifier.

The following table contains the available placeholders:

Placeholder Description
{OB} Displays an opening bracket.
{CB} Displays a closing bracket.
{A1} Displays the interval start value.
{A2} Displays the interval end value.


This example demonstrates how to create a histogram chart with bins of a given width.

private void Form1_Load(object sender, EventArgs e) {
    // Load data to a chart.
    chartControl1.DataSource = LoadDataTableFromXml("..\\..\\Data\\CityWeather.xml", "CityWeather");
    Series series = new Series();
    series.ArgumentDataMember = "Temperature";
    SideBySideBarSeriesView view = series.View as SideBySideBarSeriesView;
    view.Border.Visibility = DevExpress.Utils.DefaultBoolean.True;
    view.BarWidth = 1;
    // Configure histogram options.
    XYDiagram diagram = chartControl1.Diagram as XYDiagram; 
    NumericScaleOptions scaleOptions = diagram.AxisX.NumericScaleOptions;
    scaleOptions.AggregateFunction = AggregateFunction.Histogram;
    scaleOptions.ScaleMode = ScaleMode.Interval;
    scaleOptions.IntervalOptions.DivisionMode = IntervalDivisionMode.Width;
    scaleOptions.IntervalOptions.Width = 10;
    scaleOptions.IntervalOptions.OverflowValue = 20;
    scaleOptions.IntervalOptions.UnderflowValue = -30;
    scaleOptions.IntervalOptions.Pattern = "{OB}{A1:F0} ― {A2:F0}{CB}";
    scaleOptions.IntervalOptions.OverflowValuePattern = "{OS} {A1}";
    scaleOptions.IntervalOptions.UnderflowValuePattern = "{US} {A2}";
    scaleOptions.IntervalOptions.GridLayoutMode = GridLayoutMode.GridShiftedLabelCentered;
    diagram.AxisX.GridLines.Visible = true;
    diagram.AxisX.Tickmarks.MinorVisible = false;
static DataTable LoadDataTableFromXml(string fileName, string tableName) {
    DataSet xmlDataSet = new DataSet();
    return xmlDataSet.Tables[tableName];

The following API members configure the histogram options:

Member Description
ScaleGridOptionsBase.AggregateFunction Gets or sets the value indicating the aggregate function that should be used to relieve data.
ScaleOptionsBase.ScaleMode Gets or sets the scale mode for an axis.
NumericScaleOptions.IntervalOptions Stores options for numeric axis when its ScaleMode is Interval.
NumericIntervalOptions.DivisionMode Specifies how to divide axis scale into intervals.
NumericIntervalOptions.Width Gets or sets the interval size when DivisionMode is Width.
NumericIntervalOptions.OverflowValue Gets or sets the start value for the interval that includes overflow values.
NumericIntervalOptions.UnderflowValue Gets or sets the end value for the interval that includes underflow values.
IntervalOptionsBase.Pattern Gets or sets a format string that configures text for the interval axis labels and crosshair labels.
IntervalOptionsBase.OverflowValuePattern Gets or sets a format string that configures text for the overflow interval axis labels and crosshair labels.
IntervalOptionsBase.UnderflowValuePattern Gets or sets a format string that configures text for the underflow interval axis labels and crosshair labels.
NumericIntervalOptions.GridLayoutMode Gets or sets the value that specifies the alignment of grid lines, major tickmarks and axis labels.
See Also