For Method code types, the CodeText property of a function class must contain the body of a method that calculates the value of function and explicitly returns the value. The expected return value is of type Double. Note that VB syntax requires the inclusion of vbNewLines at the end of each statement in the code.
Dim code As String = _
"Dim x2 As Double = x*x" & vbNewLine & _
"if x<0 then " & vbNewLine & _
" return x" & vbNewLine & _
"else" & vbNewLine & _
" return 0.5*x2" & vbNewLine & _
" End If"
Dim yf As C1.Win.C1Chart.YFunction = New C1.Win.C1Chart.YFunction()
yf.CodeType = C1.Win.C1Chart.FunctionCodeTypeEnum.Method
yf.CodeLanguage = C1.Win.C1Chart.FunctionCodeLanguageEnum.VB
yf.CodeText = code
yf.MinX = -5
yf.MaxX = 5
yf.LineStyle.Color = Color.Blue
yf.LineStyle.Thickness = 3
C1Chart1.ChartGroups(0).ChartData.FunctionsList.Add(yf)
•C#
string code =
"double x2 = x*x;" +
"if( x<0)" +
" return x;" +
"else" +
" return 0.5*x2;";
C1.Win.C1Chart.YFunction yf = new C1.Win.C1Chart.YFunction();
yf.CodeType = C1.Win.C1Chart.FunctionCodeTypeEnum.Method;
yf.CodeText = code;
yf.MinX = -5;
yf.MaxX = 5;
yf.LineStyle.Color = Color.Blue;
yf.LineStyle.Thickness = 2;
c1Chart1.ChartGroups[0].ChartData.FunctionsList.Add(yf);