Chart.AlignDataPointsByAxisLabel Method (String, PointSortOrder)

.NET Framework (current version)

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Aligns data points using their axis labels.

Namespace:   System.Web.UI.DataVisualization.Charting
Assembly:  System.Web.DataVisualization (in System.Web.DataVisualization.dll)

public void AlignDataPointsByAxisLabel(
	string series,
	PointSortOrder sortingOrder


Type: System.String

A comma-separated list of series that should be aligned by axis label.

Type: System.Web.UI.DataVisualization.Charting.PointSortOrder

A PointSortOrder enumeration value that determines if ascending or descending sort order is used on axis labels, which in turn determines the order by which points that previously occupied the same axis space are displayed.

This method is used to align data points from different series along the X axis using their axis labels, and is applicable when:

  • Multiple series are displayed and are indexed; that is, all data points have an XValue of 0, or the IsXValueIndexed property is true.

  • All data points have non-empty axis labels, which are unique to their Series. If they are not unique, an exception will be thrown.

This situation is very common when data-binding results in the creation of multiple series, and string values are used for X-axis values.

Two issues arise when multiple, indexed series are plotted, and the X-values are set using string values:

  • It cannot be guaranteed that data points from different series with the same string X-values will be plotted at the same index along the X axis.

  • Only the axis label for the data points in the first series will be displayed, even though data points from other series with the same index have axis labels too.

By default, points are plotted in the order in which they are stored in their series. To specify a sort order, use an AlignDataPointsByAxisLabel method overload that has a sortingOrder parameter.

.NET Framework
Available since 4.0
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