Unit Code Types

For Unit code types, the CodeText property of a function must contain the full compile unit text. The unit must include the class "Calculator" in the UserFunction namespace, and must implement the ISimpleFunction interface.

To write code in Visual Basic

Dim code As String = _
"Namespace UserFunction" & vbNewLine & _
"  Class Calculator" & vbNewLine & _
"    Implements ISimpleFunction" & vbNewLine & _
  "    Public Function Calculate(x As Double) As Double _" & vbNewLine & _
  "      Implements ISimpleFunction.Calculate" & vbNewLine & _
  "      Dim x2 As Double = x*x" & vbNewLine & _
  "      if( x<0)" & vbNewLine & _
  "        return -x" & vbNewLine & _
  "      else" & vbNewLine & _
  "        return -0.5*x2" & vbNewLine & _
  "      End If" & vbNewLine & _
  "    End Function" & vbNewLine & _
  "  End Class" & vbNewLine & _
  "End Namespace"
Dim yf As C1.Win.C1Chart.YFunction = New C1.Win.C1Chart.YFunction()
yf.CodeType = C1.Win.C1Chart.FunctionCodeTypeEnum.Unit
yf.CodeLanguage = C1.Win.C1Chart.FunctionCodeLanguageEnum.VB
yf.CodeText = code
yf.MinX = -5
yf.MaxX = 5
yf.LineStyle.Color = Color.Green
yf.LineStyle.Thickness = 3
C1Chart1.ChartGroups(0).ChartData.FunctionsList.Add(yf)

To write code in C#

string code =
"namespace UserFunction" +
"{" +
"  class Calculator : ISimpleFunction" + 
"  {" +
"    public double Calculate(double x)" + 
"    {" + 
"      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.Unit;
yf.CodeText = code;
yf.MinX = -5;
yf.MaxX = 5;
yf.LineStyle.Color = Color.Green;
yf.LineStyle.Thickness = 2;
c1Chart1.ChartGroups[0].ChartData.FunctionsList.Add( yf);

Unit Code Types

See Also