Posted 23 June 2019, 11:00 pm EST
Is there a way in the GrapeCity.CalcEngine for the Evaluate method to have a custom handling of specific value in the arguments, where when the specific condition is not present to pass the arguments to an existing standard calculation and return the result from the standard calculation.
In the following function definition I would like to return 1 when a user creates a cell formula like ROWS2() with no arguments but if arguments are passed I would like to just have the existing ROWS function handle the evaluation passing it the ARGS that were passed to ROWS2.
Public Class Rows2FunctionInfo
Inherits [Function]
Public Sub New() MyBase.New("ROWS2", 0, 1, FunctionAttributes.Array) End Sub Protected Overrides Sub Evaluate(ByVal args As IArguments, ByVal result As IValue) Try If args.Count = 0 Then result.SetValue(1) Else [b]result.SetValue(GrapeCity.CalcEngine.RowFunction.Evaluate(args))
[/b] End If
Catch ex As Exception
result.SetValue(“#ERROR EVALUATING ROWS2#”)
End Try
End Sub
End Class
Is there any Documentation on implementing the GrapeCity.CalcEngine that has details on custom Function creation and tips and tricks or any additional resources for that CalcEngine?
Any Assistance would be appreciated,
Kevin
