ChartDataValue类

The ChartDataValue class provides an interface that allows values to be obtained from points in a series.

ChartDataValue Methods

Method	Description	See also
GetValue()	double Returns the value associated with the datapoint.
IsEmpty()	Boolean True if no value exists for the datapoint.
SetEmpty(boolean empty)	void Sets a datapoint on a series to be empty. Parameters: empty: Boolean, true if the datapoint is to be considered as empty, having no value
SetValue(double value)	void Sets the value of a datapoint. Parameters: value: double, the value of the datapoint; setting a value makes a datapoint non-empty