GetYValue

This method is used to get the YValue for a given XValue in the series. It is applicable for Line, StepLine, Spline and QuickLine charts only.

 

Syntax:

 

Numeric Axis

             chart.Series[0].GetYValue(2);

 

DateTime Axis

chart.Series[0].GetYValue(date);

              

In the following example, once you click over the chart, a messagebox will be displayed with a YValue for the given XValue.

 

void chart_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)

{

         DateTime xValue = new DateTime(2001, 1, 8);

         Double yValue = chart.Series[0].GetYValue(xValue);

         MessageBox.Show(yValue.ToString());

}

 

If the given XValue is not under the Axis range, the method will return NaN.