WinChartViewer.getValueAtViewPort

ChartDirector 7.1 (.NET Edition)

Usage

`[C#]`	`public double getValueAtViewPort(string id, double vpCoor [, bool isLogScale ]);`
`[VB]`	`Public Function getValueAtViewPort(id As String, vpCoor As Double [, isLogScale As Boolean ]) As Double`

Description

Converts a viewport coordinate to a value of the specified data scale.

Please refer to WinChartViewer.setFullRange on how to define a data scale.

This method always returns a numeric value. If the axis scale is a date/time scale, and you are expecting a DateTime data type, please use Chart.NTime to convert the number to the DateTime data type.

Arguments

Argument	Default	Description
id	(Mandatory)	The name of the data scale.
vpCoor	(Mandatory)	The viewport coordinate.
isLogScale	false	true if the conversion is based on a logarithmic scale. false if the conversion is based on a non-logarithmic scale.

Return Value

The value of the specified data scale at the viewport coordinate.