Instead of adding source code to the CodeText, CodeTextX or CodeTextY properties, an event delegate can be used to specify an event method to calculate the appropriate function value.
When using event delegates, the function value is calculated in event CalculateY for the YFunction class objects. For ParametricFunction class objects, two events, CalculateX and CalculateY must be set, one for each calculated coordinate. Non-null event delegates indicate that the event should be used to calculate the corresponding function value, even if the corresponding CodeText property is also specified in either the YFunction or ParametricFunction class objects. In order to use events, the programmer must provide the appropriate event handlers.
Private Sub Button_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button.Click
Dim yf As C1.Win.C1Chart.YFunction = New C1.Win.C1Chart.YFunction()
AddHandler yf.CalculateY, AddressOf Function_Calculate
yf.MinX = -5
yf.MaxX = 5
yf.LineStyle.Color = Color.DarkBlue
yf.LineStyle.Thickness = 3
C1Chart1.ChartGroups(0).ChartData.FunctionsList.Add(yf)
End Sub
Private Sub Function_Calculate(ByVal sender As Object, _
ByVal e As C1.Win.C1Chart.CalculateFunctionEventArgs)
e.Result = e.Parameter * e.Parameter * e.Parameter ' y = x*x*x
End Sub
•C#
private void button_Click(object sender, System.EventArgs e)
{
C1.Win.C1Chart.YFunction yf = new C1.Win.C1Chart.YFunction();
yf.MinX = -5;
yf.MaxX = 5;
yf.LineStyle.Color = Color.DarkBlue;
yf.LineStyle.Thickness = 2;
yf.CalculateY += new C1.Win.C1Chart.CalculateFunctionEventHandler( Function_Calculate);
c1Chart1.ChartGroups[0].ChartData.FunctionsList.Add( yf);
}
void Function_Calculate( object sender, C1.Win.C1Chart.CalculateFunctionEventArgs e)
{
e.Result = e.Parameter * e.Parameter * e.Parameter; // y = x*x*x
}